Motor for Chester Champion Mill

[John CoatesParticipant @johncoates48577]

Posted by John Stevenson on 13/09/2017 11:05:32:

But hey guess what the deep pocketed tight arsed punters reckon its too expensive and so insist on buying the older generation DC package where they have had to cut corners to meet a price.

You bugger! Almost spilled my tea and coughed and spluttered over my keyboard after reading that!

[not done it yetParticipant @notdoneityet]

brushed DC motors on machine tools will be a distant memory.

Not so. There are still many machines on the market, aimed at first time buyers, generally. Often those that are in the market, but unaware of the deficiencies of some machines, particularly the motor/controller combinations.

[Nick_GParticipant @nick_g]

Posted by not done it yet on 13/09/2017 12:24:20:

Not so. There are still many machines on the market,

.

I didn't say there wasn't. I meant their days were numbered.

Unless of course they have a revival like the Bay City Rollers did.

Nick

[not done it yetParticipant @notdoneityet]

I meant their days were numbered.

You may well have done, but there are lots of them out there, and will be for several years – unless their horrible, not fit for purpose motors/control boards are replaced, before being offered for sale, or these cheap under-designed machines are scrapped.

In the meantime, there will be a lot of unsuspecting buyers (perhaps as JS suggests, or maybe new starters that just don't have the funds for a bright shiny new machine). Ethics, really – whether you support the unsuspecting innocent buyer or the possibly unscrupulous seller pushing off his rubbish machine to an unsuspecting buyer.

I rest my case. It does not, and will not, affect me. I would be very wary of buying second hand chinese and would even avoid new chinese at that end of the market.

But please don't quote me and then include dealers or distributors in your apparent reply to my quoted post. I did not mention them at all.

[Michael GilliganParticipant @michaelgilligan61133]

'not done it yet'

As a disinterested [not unininterested] observer of this thread … may I ask a favour ?

When you are quoting others, could you please do so in the conventional manner [i.e. by using the Quote button and thereby including the timestamp etc. of the source posting] instead of just pasting an emboldened phrase taken from some prior post. … Extracts are fine, but the timestamp identifies the source.

It's a small thing, but it does make it easier to follow the thread.

Thanks

MichaelG.

[Nick_GParticipant @nick_g]

Posted by not done it yet on 13/09/2017 14:12:47:

But please don't quote me and then include dealers or distributors in your apparent reply to my quoted post. I did not mention them at all.

.

I wouldn't know.? – As to date I don't own any far eastern machinery.

Nick

[Gray62Participant @gray62]

For those of you who may be interested, the 'nominal supply voltage in the UK is now harmonised with Europe and is quoted as 230V +10% -6% which means the voltage you measure in your property on a single phase supply can be anywhere between 216v and 253v and still be within permissible limits. My supply normally sits around 242V but I have seen it drop to 235 at peak load times, we are however quite close to the sub station so variation is usually small.

[SillyOldDufferModerator @sillyoldduffer]

Posted by John Stevenson on 13/09/2017 11:05:32:

Posted by not done it yet on 13/09/2017 08:07:52:

…

…

But hey guess what the deep pocketed tight arsed punters reckon

…

Deeply offended by that I am. To be clear I 'm not only tight arsed and deep pocketed, I have short arms as well. When first married my wife and I shared something truly beautiful. But then she spent it.

Dave

[David Standing 1Participant @davidstanding1]

Posted by Nick_G on 13/09/2017 16:36:11:

Posted by not done it yet on 13/09/2017 14:12:47:

But please don't quote me and then include dealers or distributors in your apparent reply to my quoted post. I did not mention them at all.

.

I wouldn't know.? – As to date I don't own any far eastern machinery.

Nick

Stop that right now

[Neil WyattModerator @neilwyatt]

Posted by duncan webster on 13/09/2017 00:30:40:

this problem comes up time and again on the forum, burned out motors and control boards.

Come on Neil, time for an article in MEW on how to replace the horrible DC motor on your Chinese mill or lathe with a three phase squirrel cage VFD drive motor

Keep up at the back Duncan! This has been on the website for three years:

3-phase-conversion-and-other-alternative-methods-of-powering-a-mini-lathe/18752

I'd stress that I blew my motor by trying to take extended cuts at 6 11/2" diameter in cast iron at 60rpm. No one told me that could overheat a mini-lathe…

The board blew in response to a long thread of swarf snaking into the control box, a bit of an unlikely event, but mine was a 1998 machine and 'modern' ones have a rubber gasket blocking the hole.

Personally I don't think the brushed DC motors with the second generation boards have anything wrong with them IF you understand that they must not be allowed to overheat.

The new brushless motors are more pricey, but better as they have more intelligent controllers and really can't be sdescribed as 'horrible' in any way.

Neil

[Mark Lawson 1Participant @marklawson1]

Posted by John Stevenson on 13/09/2017 11:05:32:

Posted by not done it yet on 13/09/2017 08:07:52:

But hey guess what the deep pocketed tight arsed punters reckon its too expensive and so insist on buying the older generation DC package where they have had to cut corners to meet a price.

 

 

Brushless motors were not an option at the time I bought my mill regardless of how deep my pockets, I don’t have to justify anything to you least of all what I spend.

 

Hi Silly old duffer, my mill is used a few times per month; it’s used mainly for alloy and occasionally a bit of brass I build 1/6 scale RC tanks mainly from kit and either modify parts or scratch build them, I never mill steel or stainless the largest tool I use is a 13mm end mill but mainly 6,8 and 10mm with a .5mm cut.

If I’m going to be spending £300 on replacement motor and board then I’m going to be buying brushless as opposed to these motors.

 

 

Edited By Mark Lawson 1 on 13/09/2017 22:09:26

[Mark Lawson 1Participant @marklawson1]

Pictures of the original motor the latest is the same type

This is what I’m working on at the moment

[Ian S CParticipant @iansc]

That is a DC motor with brushes. At 5200 rpm its no induction motor on 50 HZ.

A web site that I had a look at said that Chester removed the Chinese control board , and replaced them with boards made in USA.

Tony Durkin, Sales engineer at Chester Machine Tools has a forum on line where you can ask questions, and forward ideas.

Ian S C

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