conversion on Myford 254

Has anyone out there done a CNC conversion on a Myford 254 with screw-cutting gearbox? If so can you get in touch so I can pinch your design ideas for mounting encoder and motor. I want to keep the gearbox so I can use the feed-shaft for cross-slide (I'm only doing the ELS version)

There is a manual here from february 2018 translated from german.

ELS

The newest is only in German but pictures needs no words

Hi Duncan,

I converted my Warco GH 1000 to part cnc use and did not use
the original lead screw that is on the machine,i made a new lead screw
that has the stepper motor fixed on a bracket that clamps to the bed
of the lathe , it appeared in an article in mew in issues 207 through to 212.
No real alterations were needed to the machine i think i had to drill and tap
about 5 holes.
Even has it's own thread on here ,not worth reading as there is nothing
constructive in it.

John

Thanks John, Warco deny ever having made a GH1000 lathe, so could you just confirm it's centre height, it looks similar to mine at 5". Looking forward to reading your articles in MEW, at least it is giving me a handle on stepper motor size

Posted by Duncan Webster 06/06/2019 12:57:16

Thanks John, Warco deny ever having made a GH1000 lathe, so could you just confirm it's centre height,
it looks similar to mine at 5". Looking forward to reading your articles in MEW, at least it is giving me a
handle on stepper motor size.

Hi Duncan,

Here are the original leaflets from 1999 as you can see the GH 1000 swings 13 3/8 inch over the
bedway and 18 1/2 in the gap.The stepper motor that drives the 10 tpi lead screw came from
Arc euro and was 350 Ncm 10 mm shaft 3.36 volt 4.2 amp /phase. As i use Compucut
an early hobby cnc system that is unipolar the output of the motor is slightly less but still
more than enough to do the job.
I see from the pages of lathes .co .uk that the Myford 254 has a protusion where the lead screw
passes through the rear mounting much like the Super 7 lathe.
I have a super 7 lathe that is also part cnc and is driven this way ,the problems in using the original
lead screw is the continual movement and wear of a cnc system as this is always going to be up the chuck
end and also the backlash in the halfnut on the machine,on a gearbox machine such as my GH 1000
there is also the additional drag of driving this around.

John

Edited By John Pace on 06/06/2019 18:33:57

Excellent, thanks, not sure why Warco disowned it! that and your article give me a lot to go on