Elliott Omni 00 bed adjustment

[Wade BeattyParticipant @wadebeatty78296]

Hello,

I have an Elliott Omni 00 and am not sure how to adjust the bed in the Y direction. The front of the bed is five thousands higher than the back. I see adjustment possibilities but I do not have a manual. Any advice welcome.

Regards,

Wade

[Wade BeattyParticipant @wadebeatty78296]

How to adjust Y direction on bed

[Nigel McBurney 1Participant @nigelmcburney1]

Hi I have an 00mnimill and the original hand book. For the adjustment of x and y slides the instructions are poor and ust nearly lines long,the x and y slides are adjusted by using tapered gib strips and these are adjusted by push and pul screws at each end of the gibbstrip. As there is no indication which end of the taper is thickest and its not visible,so experiment,slacken one screw a turn or two,and then screw in the screw at the other end if the slide goes tight then the second screw is at the thick end of the gibb ,unscew the second screw a little tighten up the screw at other end and and test the fit,and carry on adusting the tapered gib until the correct clearance is achieved,and there are no tight spots. Te instructions in the handbook are very brief as in the days when this mill was made ie 1960s I expect the majority were in commercial use and most users were apprentice trained, and knew what to to maintain the usual machine tools so istructions were very brief,Very often the instructions were brief, there is a diagram and six lines of instructions on horizontal spindle adjument minimum .0004 ins axial float , no max given and yet it says great care must be taken when adjusting these bearings,Regarding the vertical spindle,there are no instructionsat all for adjusting the bearings and there is only an exploded dwg on pages detailing the parts list.I do not see how the front of the bed is 5 thou higher at the front,which I assume mean the handle end, I can understand the front being lower if the vertical z axis slides were slack and the weight of the knee caused the whole lot to drop. Now the z axis vertical slides do not have tapered gib strips,they are plain and parallel,and adjusted by slackening slightly the three bolts with heads facing front,and pushing the gib sideways towards the v slide,this gib is adjusted by 2 socketgrub screws and lock nuts, Not easy to adjust,I cannot undestand why Elliotts did not use taper gibs on the z axis which are a lot easier to adjust, Elliotts could at times incorporate some cheap nd nasty features, On the sales leaflet I have which came with machine it cost £705 where as a ML7 lathe equipped ready to go was £82 or £120 equipped,so an 00 was relatively epensive.

[RobCoxParticipant @robcox]

Hi Wade,

From your description it appears to me that the table is not at 90deg to the slide on the column. You may find that the gib between the column and the knee needs adjusting which I seem to remember is a normal non tapered gib but I havent had to adjust mine in a long time so I may be wrong.

The y axis gib is tapered and is thickest at the front. Make sure the screw at the back is tight otherwise the gib may get pulled in when the table is moved towards the operator which will cause it to jam.

Rob

[Paul KempParticipant @paulkemp46892]

I also struggle to understand how the table can be high at the front, how are you measuring it? Are you are tramming off the vertical spindle? The tapered gib for the x axis has the thick end to your left stood in front of the machine in the operating position (or mine is anyway as I adjusted it last weekend). I reckon they are great little machines.

Paul.

[BazyleParticipant @bazyle]

Think hard about your description and method of measurement. Wear in the knee means the table will sag at the front.
However if this is the result of you 'tramming' by rotating an indicator held in the spindle then the actual problem is that the spindle is not vertical. Quite a lot of places where this can go out so needs careful measurement of each of the interfaces.

[Wade BeattyParticipant @wadebeatty78296]

First, thanks for all the replies. Very helpful.

I spent a bit of time setting up a couple of tests today tramming from the vertical spindle. The bed is high on the back by .005" not the front as I reported, sorry about that.

I also trammed the column from the vertical spindle and saw no movement at all on the indicator with several full up and full down cycles.

Tomorrow I will try adjusting the tapered gibs on the y axis as suggested in the replies

Thanks again

Wade

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