No. 4501 The MEX Judges Reports

Advert

No. 4501 The MEX Judges Reports

Home Forums Exhibitions, Shows and Club Events No. 4501 The MEX Judges Reports

Viewing 25 posts - 1 through 25 (of 28 total)
  • Author
    Posts
  • #4474
    Michael Checkley
    Participant
      @michaelcheckley34085
      Advert
      #178630
      Michael Checkley
      Participant
        @michaelcheckley34085

        2014 proved to be an interesting year for my model engineering as having recently turned my hand to metal rather than just wood more commonly found on my RC models I found myself writing an article for MEW and entering my creation in to competitions at Midlands and Sandown (a challenge almost as great as the machining itself!). So after all the excitement I was looking forward to reading the judges report from MEX….

        My vice was last to be discussed in the article but not leaping to the end (honest) I read from the beginning and it did not start well….Mr Read sounded disappointed with the number of entrants this year even though there was a good selection of tooling on display in the non competition areas, hopefully this discussion may help Mr Read answer his question. It certainly is not my place (nor in my opinion Mr Read’s place) to comment or assume on the intentions of the individual when they start a project and whether they intend to use their creation to its full potential but I hope Mr Farr is enjoying dispensing copious amounts of oil from his oilcan which had had much effort put in to its finish. I must admit to suffering from the same flaw as I spent considerable time with wet and dry and polish to improve the finish of my vice even though it was destined to be covered in swarf and cutting oil as it is now! All I can say is some of us take pride in everything we do and will continue to do so.

        On to Mr Read’s comments about my effort….

        My requirement for making a vice was not born simply from the desire to build a vice but to fulfil a need for a vice that was more functional than my tool makers vice and also low profile to make the most of my vertically challenged Denford Novamill. Searching through the commercially available offerings didn’t really find anything that wouldn't gobble up the millimetres of height I had available so I was left with the task of designing my own. The design process was an iterative one chasing mm’s to give me the lowest profile and best functionality for the projects I had in mind. As a result the 10mm ACME screw was chosen and considered suitable for the job in hand and has provided sterling service over the last 12months of use (taking out its holidays to the shows). Sadly the selection of this screw cost me points as Mr Read didn’t feel it man enough for the job, but what job? Certainly suitable for what I had in mind. If I or a model engineer thinking of building this design has grander projects in mind then don’t be put off by Mr Read’s suggestion to machine something more suitable just buy the next size up from the helpful chaps at Merchant Dise and juggle with the dimensions to fit it in, if you can accommodate the extra height then even better.

        Mr Read questioned the need to make the fixed jaw separate from the base and he is correct that these two parts could be machined as one but not on my milling machine! I think it is easy to forget that not all model engineers have a workshop full of Myford’s and Bridgeport’s or even the space for them!

        Mr Read decided to apply some engineering to the fixing of the fixed jaw and stated a figure of 1850kgf for the tensile strength of an M5 screw. I’m not quite sure where this value has come from as, assuming we are practising our hobby on earth, then converting this to an SI unit we get 18148N, which seems a little high to me. Bearing in mind that Mr Read was making a point about its suitability for anything other than “light milling” then I thought I should apply some facts. If we look at published data for A2-70 screws the tensile strength is 700MPa however a more suitable mechanical property to use in this design would be the yield strength which is 490MPa giving a maximum tensile force of 6187N per bolt assuming only 2 of the 4 bolts take the load then that is 12375N, still less than Mr Read’s estimate but lets be realistic here, we are talking about thousands of Newton’s cutting force so is really irrelevant for the home workshop. What is more important is the preload within the screws from the applied torque. Exceeding this preload will cause the fixed jaw to gap from the base and thus the workpiece will move reducing the final accuracy of the finished part. If a modest torque of 2.5Nm was applied with typical coefficients of friction and lubrication taken in to account we would get a preload of 2800N per bolt, need I continue? I hope not. However for those that like to go the extra mile when tightening up a screw then you could upgrade to A4 or even a high tensile steel screw.

        I stumped the judges with why this configuration lends itself well to a CNC milling machine but given the good grasp of the concept by the folk who frequent this forum when the project was first discussed I will keep the reasoning brief….The reason for having a fixed near jaw rather than the rearward jaw being fixed as found in most commercial vice is that any movement from this fixed near jaw in the Y direction on the mill will be a positive movement making writing and visualising a CNC program easier and reduce error. The same theory can be applied to the endstop in the X direction and this can be fixed to either side of the vice as with a ‘normal’ vice.

        Ok, so I think a point was being made to include Judges notes! Being new to the scene I didn’t appreciate the need for them but I do now and will include them in future and even more so if it is something of my own design to justify those design decisions. Although, does the builder of someone else's design need to justify the design to the judges also? Food for thought maybe……

        #178631
        Michael Checkley
        Participant
          @michaelcheckley34085

          ……..

          To conclude, my experience of entering the competitions was an enjoyable one and I proudly exhibit my two certificates on the wall of my workshop for when my club mates pop around for a brew and chat about all things modelling. Sadly this result has been shadowed by the knowledge that the criteria used for the judging at MEX may well have not been that well structured and consistent for the different entries. I found Mr Read’s article to be less constructive than I had hoped and I’m a little disappointed in the editorial team of Model Engineer for not stepping in and describing a more professional approach to the judging.

          From earlier discussions about the decline of MEX I was quite excited by the idea of this show being the centre of excellence for model engineering competitions. If this is to be the case then I would suggest that the judging is given some thought and better justification for the decisions made is given. In my opinion the judging of tooling should be based on the complexity of the problem being solved and how well the tooling solves that problem as well as the normal quality of work and finish e.t.c, I don’t think this criteria or even one close was applied at MEX.

          #178643
          Diane Carney
          Moderator
            @dianecarney30678

            In defence of the Judges – and, possibly the 'Editorial team' (i.e. me) – the person judging cannot possibly know to what use the tooling is intended to be put if there is nothing to tell him. You have, to some extent, asnwered your own question by recognising that Judges Notes are an important part of the entry, which is why it is mentioned on the entry form and also why we "bang on about it" whenever we publish Judges Reports in either magazine. If some aspect of the entry is not obvious to a judge he can only make assumptions and base those on his own experience/knowledge. Points are awarded for a number of different 'aspects' of the entry; in the case of a model it is, perhaps, a little more obvious what they are than in the case of an item of tooling but I would argue that it is very well structured indeed. I am sure that the value and success of the problem solving is very much taken into account – as far as it can be understood by simply looking at the entry. The page space for the report is, of course, limited and we do try to present good sized photographs when reporting on the exhibition. The judges try to give a very fair appraisal of how they have marked when reporting in the magazine and I can say for certain that all criticism is deffinitely intended to be constructive. It is a difficult job.
            I am glad you chose to enter the vice and sincerely hope you will enter your work again in future. It was much admired!

            Diane

            #178644
            Another JohnS
            Participant
              @anotherjohns

              Michael;

              First – well done with your effort.

              Second – it takes courage to enter, and to judge. I look forward to viewing your next entry. Life is a learning experience, and without criticism and encouragement and a door to walk through (for further knowledge!) life would be boring indeed. (that applies to both entrants and judges, and to editors, too)

              Off to dinner, then into my workshop! Got to get that CNC drill operation perfected. John.

              #178651
              JasonB
              Moderator
                @jasonb

                Having enjoyed a 2 hour talk by one of the ME judges about how they go about things I can agree with Diane that it is a structured process with as set number of points available for various criteria such as suitability of materials, design, workmanship, etc.

                Maybe the need for some notes was not as clear as it could have been, I'm sure if a design brief had been included and also some of those calculations you have just shown then the judge may have been better able to assess the vice on teh basis it was designed for.

                Hopefully this will not put you off and you will be better armed for your next entry.

                J

                PS I did feel teh number in that class as well as IC and stationary engines was down from previous years.

                #178656
                Michael Checkley
                Participant
                  @michaelcheckley34085

                  To pick up on the discussion about judges notes, I have had a look at my application form and it states "Are you supplying Judges notes Yes or No" I actually ticked yes thinking my drawings would fit this description, clearly not looking back on it but there is nothing in the guidance notes section describing what is expected in the judges notes or the importance to include them. For people new to the competition scene I dont think it is adequate to rely on "banging on" about judges notes in previous reports as we may not have read all the back issues. If the judging is going to go to pot without them and there is an opportunity to revise the guidance notes on the form then I would suggest a few words are added here to describe what is needed/expected.

                  Criticism is certainly welcome, my work is reviewed on a daily basis so I certainly get my fare share. In this case I didnt find that all the comments made in the article covering all the entries were appropriate and didnt do much to encourage future entries which is a lost opportunity given that numbers are falling. I havnt been put off competing and I`m busy working on this years entry which will hopefully be ready for my more local model engineering shows.

                  John – Is it just me or is there something quite rewarding about watching a pattern of holes being drilled with a well perfected drilling operation?

                  #178662
                  Chris Trice
                  Participant
                    @christrice43267

                    While I wouldn't discourage competition, what people build should be built to satisfy themselves rather than other people. As you've found, your excellent vice satisfied YOUR needs perfectly.

                    #178704
                    Another JohnS
                    Participant
                      @anotherjohns

                      John – Is it just me or is there something quite rewarding about watching a pattern of holes being drilled with a well perfected drilling operation?

                      Michael – the operation I currently enjoy the most is watching a mesh of holes get drilled in plastic; a few holes a second, all precisely placed. Ah! the little pleasures of life. Now to get myself off to work through the snow and cold – reality hits hard sometimes!

                      John.

                      #178718
                      Neil Wyatt
                      Moderator
                        @neilwyatt

                        I'm too close to the process to make fair comment on what has been said, but I will say that if you look back at MEs before the 1970s, some of the judges reports don't offer 'constructive criticism' – for some poor souls it was more of an all-out character assassination!

                        Chief judge, Ivan Law wrote a piece for MEW issue 95 on 'Judging Tools and Workshop Appliances' for anyone who has access to the archive.

                        It probably would be a good idea to have more advice for entrants on what supporting information is helpful – the one time I entered a competition, I struggled with not knowing what to use. Luckily the quality of my entry saved me from the embarrassment of an award

                        Speaking to Ivan at the show, he was at pains to say how we wished there was a lot more 'ordinary tooling' entered. He said he didn't expect much that was made for day to day workshop use to be of medal-winning standard. He felt that most show-goers wanted to see well-made, functional tools that inspired them to have go, rather than than polished and perfect tools that look like they belong in a brass case and never get used.

                        Neil

                        #178728
                        John Stevenson 1
                        Participant
                          @johnstevenson1
                          Posted by Neil Wyatt on 06/02/2015 14:32:42:

                          Speaking to Ivan at the show, he was at pains to say how we wished there was a lot more 'ordinary tooling' entered. He said he didn't expect much that was made for day to day workshop use to be of medal-winning standard. He felt that most show-goers wanted to see well-made, functional tools that inspired them to have go, rather than than polished and perfect tools that look like they belong in a brass case and never get used.

                          Neil

                          .

                          Something I have said for a long while, even said it on here and been shot down in flames for it so very nice to see someone as respected and experienced as Ivan saying the exact same thing.

                          A lot of 'novel' tooling is often quite rough as it's not known whether or not it will function as required. If it does function OK then it tends to get used unless a MKII is needed.

                          I actually threw a piece away like that this week. OK wouldn't have made an article as all it was was a drilling jig for doing 3 M5 holes.

                          Made from 5 pieces of rough cut steel flat and welded with the proverbial Pigeon $hit [ lesser crested variety ], no matter what it looked like it worked and probably at a rough guess earned me upwards of £2000 in it life.

                          Even if it had been a jig for something useful and recognisable in the home shop it would still have been rough cut and welded up.

                          Might just grab this original jig out the skip and enter it at the next show, with judges notes of course wink

                          Can't see it getting a medal though. crying

                          #178740
                          Bazyle
                          Participant
                            @bazyle

                            At our club a while back we have had a couple of judges explain their requirements. Our members were well put off entering though in the past we have had medal winners.
                            Basicly a damn fine modeller who makes a damn fine model is not in the running like they might have been 40 years ago. It is not in the mindset of say a retired toolmaker to provide a plie of paperwork and nor should it be.

                            The good thing about MEX used to be that the medals rather than place system can reward in relation to actual quality rather than in relation to what happened to be competing that year.

                            Now you have to be an acedemic who researches a prototype that has never been seen before including interviewing the original designer 100 years dead, produce your own drawings that are superior to the original works drawings, not correcting any flaws of course, smelt your own ore for the castings and document the whole build in 3D interactive video.

                            #178741
                            Roger Williams 2
                            Participant
                              @rogerwilliams2

                              John, well said.

                              #178747
                              roy entwistle
                              Participant
                                @royentwistle24699

                                Gentlemen and Dianne I feel I must support Neil Read He was as a judge asked to provide his opinion of work submitted That is what he has done Give his opinion I have read Mr read's comments in ME and find them fair and in no way degrading What I don't understand is why this thread was started in the first place

                                Just my opinion

                                Roy

                                #178755
                                Nicholas Farr
                                Participant
                                  @nicholasfarr14254

                                  Hi Michael, I thought your vice was very well made and presented, but I did fail to realise what was different from other vices that I've seen before. However, I could see that a lot more effort must have been put into your vice than I had put into my oilcan and could not understand why my entry received a higher award than yours, but then I'm not a judge. With regards to judges notes, I have always thought, rightly or wrongly, that they should be of your own interpretation to explain your own methods and reasons for the final exhibit so that anyone judging your work is not left thinking such things as; "I wonder why it was made this way" or "Why isn't it as specified on the drawing" ect. When you've created something of your own design, maybe this is more important so that the whys and wherefores are explained. I try to keep my notes as concise as possible but to the point and believe photos help to do this. The statement about my oilcan not ever seeing oil or dispensing it is likely to be true, by myself that is, but it has functioned with clean water and I have started to make a second one that I not going polish up. As for spending it's days in a display cabinet, I have not got one. Yet !

                                  I started to make my oilcan from Morgens article out of curiosity without any intention of entering it into the MEX as I was finishing off my tapping and drilling machine which I entered into the loan section, but still supplied judges notes although it would not be judged, but some visitors like to know how you do things and why and what you use. during the time I was making it, it dawned on me that I could also enter this in the loan section, but I got carried away with cleaning it and making it a bit tidy, I decided to give it a go in the completion as I thought it really did look too nice to use.

                                  Awards are always nice to receive whatever level they are, but I've never entered any of the competitions expecting one. I like to think the best thing that I could achieve is that at least one person has picked up an idea from any of my exhibits, be it to reuse a piece of material that they would have binned or a particular adaptation for something sitting in their workshop or they may go home thinking that if I can do it they might be able to do it to and maybe improve it also.

                                  Please don't be put off by your competition entry efforts and look at it as a learning curve for the next one.

                                  Regards Nick.

                                  #178756
                                  Neil Wyatt
                                  Moderator
                                    @neilwyatt

                                    I don't knock anyone who can produce something like Alan Jackson's Stepperhead. I note it won Gold AND is regularly used, and I think anyone would accept it's the sort of complexity and quality to deserve that, but it isn't overfinished.

                                    The sort of things Ivan and I discussed were like those seen in some old MEs – tools with all the non-functional flat surfaces scraped. Looks great, but has no impact on the function of the tool whatsoever.

                                    Neil

                                    #178760
                                    martin perman 1
                                    Participant
                                      @martinperman1

                                      The problem with judging competitions is that its subjective, no one person looks at something the same way as others, even if they are given guide lines to follow these are interpreted differently. In my main hobby there is judging for the best engine, one week a heap of rubbish wins and the following week another engine wins because it is nice and shiny because that is what the judge wanted.

                                      Martin P

                                      #178763
                                      Michael Checkley
                                      Participant
                                        @michaelcheckley34085

                                        Hi Nick, thankyou for your comments and advice on judges notes, I will certainly be including them for the reasons you mentioned in the future. Your oilcan was extremely well made and well worth your award, if it was mine I would use it. smiley

                                        Incase the thread changes direction slightly please dont misunderstand that I was unhappy with the award I received as it was quite the opposite and I am extremely pleased to receive a commendation from MEX in my first year of competition. So, to answer Roy's question the reason why I started this thread was that Mr Read had made some incorrect assumptions about my work and also some incorrect statements about its functionality. Yes, I know, this could have been avoided to some extent with judges notes but I I'm still not convinced that all the issues would have been covered and perhaps the judge should have used a bit more engineers judgment to assess its functionality.

                                        It has been mentioned in every presentation I have attended and on here that competition entries are falling. There is clearly an issue as people are still making the same effort to display their pride and joy and choosing not to enter the comps, perhaps a similar experience to my own has been a contributing factor for others.

                                        My love for wet and dry and metal polish wont allow me to accept that an entry should loose marks because it has been unnecessarily polished to within an inch of its life and afterall there must be a category in the judging for quality of finish….

                                        #178764
                                        Neil Wyatt
                                        Moderator
                                          @neilwyatt

                                          > My love for wet and dry and metal polish wont allow me to accept that an entry should loose marks because it has been unnecessarily polished to within an inch of its life and afterall there must be a category in the judging for quality of finish….

                                          I don't think they should lose marks, but they shouldn't GAIN marks over a tool with an appropriate finish.

                                          I note that Giancarlo's spectacular model locos which are finished in bright metal are judged as general engineering models, not in the loco classes where they would lose many marks for a non-realistic finish.

                                          Now don't start me on model boats with brass belaying pins…

                                          Neil

                                          #178773
                                          John Stevenson 1
                                          Participant
                                            @johnstevenson1

                                            Wots wrong with brass belaying pins ?

                                            I think they look nice and shiny and pretty and…………………………..

                                            #178774
                                            Harold Hall 1
                                            Participant
                                              @haroldhall1

                                              I have been prompted on occasions, even when I was editor, to comment on the awards given for workshop equipment, but to be honest have chickened out. Even this year, with both magazines commenting on the small number of entrants, an ongoing situation for very many years.

                                              However, it was this thread that made up me finally make up my mind to offer some comments. Even so, I do not intend to comment on what has already been said but to offer my thoughts on the subject.

                                              Deciding to enter two non tooling items into the 2012 exhibition which I thought were just possibly candidates for a bronze, I also considered it was about time I took note of my plea, as editor, and enter three from the many workshop tools I had made. I had no excuse, I had to go to take the two I wanted to enter. To be honest, I entered the others just to see what happened, I had little hope in receiving a medal, perhaps a bronze for one maybe.

                                              The items were a Dividing head, Rotary Table and Mini boring head gaining Very highly commended, Highly commended and Commended in that order, no medals. This is not sour grapes on my part, I was very pleased with my results as my two other items both got silver medals and in quite diverse classes Horology and Horse Drawn Carriages.

                                              Comparing the Tip Cart with the workshop equipment entries cannot be done reasonably as they are so very different, the Cart being mostly hand made. The clock though not that different to my workshop equipment. What then are the differences. Lets just consider the Dividing head

                                              The clock made to a provided design.
                                              The dividing head made to my design.

                                              Making the clock was much like making most other clocks. Note I do say most.
                                              Making the dividing head had its own problem areas.

                                              The clock was very time consuming.
                                              The dividing head much less so.

                                              The clock was made to a high standard of finish.
                                              The dividing head did not need a lot of attention with regard to finish

                                              The clock works well
                                              The dividing head works well even providing more divisions than the Commercial Semi Universal dividing head and with very much greater scope for direct dividing, typically. using gear wheels, both from the lathe and elsewhere.

                                              Where does this get me regarding the judging criteria, well here are a few pointers.
                                              1. Was the exhibit designed by the exhibitor.
                                              2. If so does it follow closely to other designs, or is it unique.
                                              3. Is the item commercially available, if so how does it compare.
                                              4. How well will it perform its intended tasks. Is it robust enough for example.
                                              5. How easy, or difficult, will it be to perform its intended tasks.
                                              6. What machines did the exhibitor have to make the item.
                                              7. How difficult, or easy, would it have been to manufacture on the available machines.
                                              8. Is it using the best, or at least adequate, materials for the exhibits purpose. No dovetail slides made out of aluminium for example, and I have seen it.
                                              9. If there is some appreciable non metalworking aspect to the exhibit, a wooden storage case for example, should this be scored or not.
                                              10. Would it have taken a long timeto make the item, needing patience.
                                              11. Now to a debatable subject. FINISH.

                                              If done on a points system how many for each consideration. All 1-10 or say Finish getting more than design.

                                              Here I may be getting myself into deep water. But, typically, I consider that most stationary steam engines (and I've made five)are much the same, in terms of the difficulty in making them, with of course the little extra problem area here and there. Most workshop items are a one off, OK with a lot of standard machining operations but setups can be very very difficult to chose and work to.

                                              It was in this area that the awards I had for my workshop items puzzled me. The Mini boring head, fitted into a well made finger jointed box, the head finished to a good standard and the machining required being much more complex than most would tackle without guidance and certainly much more difficult than the other two items which most would tackle. This was awarded just a Commended certificate. Incidentally, I did send details of the complexity with the exhibit.

                                              If you would like to see the mini boring head and the setups for making it see my website here–**LINK**

                                              I will close to say again, this is not sour grapes on my part just some comments to see if something can be done to encourage more to participate in this class. Could not the standard for a bronze medal be dropped a little so more could consider they were in with a chance. A medal is nice but a piece of paper much less so.

                                              Harold

                                              #178777
                                              Harold Hall 1
                                              Participant
                                                @haroldhall1

                                                I should have added that I am not judging the judges, I am sure they were working to the criteria of the day.

                                                Harold

                                                #178778
                                                Alan Hopwood
                                                Participant
                                                  @alanhopwood63369

                                                  I've read this thread with considerable interest, as most of my model engineering is based on making tools. I attended Sandown for the first time this year, and was a bit disappointed with the tooling section of the competition. I felt that there was a both a lack of numbers of entries, and a lack of complexity. Mind you, our own (Harrogate) exhibition has been very poorly supported by tooling of late.

                                                  As could be seen from my GHT display, I'm no exponent of the wet and dry school of finish. If it does the job required, and the edges don't cut the hands too often, then it's a good tool.

                                                  Poor old Neil Read is taking a bit of a kicking lately, what with the drill expert having a go about his inability to off hand grind a drill within tolerance, and then for, what I took to be reasonable comments, his critique of a milling vice.

                                                  Regards,

                                                  Alan.

                                                  #178805
                                                  roy entwistle
                                                  Participant
                                                    @royentwistle24699

                                                    I still consider it bad manners to criticize judges referees umpires etc

                                                    Roy

                                                    #178807
                                                    Nick_G
                                                    Participant
                                                      @nick_g
                                                      Posted by roy entwistle on 07/02/2015 09:08:01:

                                                      I still consider it bad manners to criticize judges referees umpires etc

                                                      Roy

                                                      Ditto. I agree.!

                                                      I know very little about engineering. But to do so in ANY genre be it sport, art, jam making or engineering will most likely be seen as 'Throwing ones toys out of their pram' frown

                                                      "It's just not cricket ole boy. It's not the British way" !!! wink

                                                      Nick

                                                    Viewing 25 posts - 1 through 25 (of 28 total)
                                                    • Please log in to reply to this topic. Registering is free and easy using the links on the menu at the top of this page.

                                                    Advert

                                                    Latest Replies

                                                    Viewing 25 topics - 1 through 25 (of 25 total)
                                                    Viewing 25 topics - 1 through 25 (of 25 total)

                                                    View full reply list.

                                                    Advert

                                                    Newsletter Sign-up