RE: [CAD_CAM_EDM_DRO] Myford Lathe Converson.

Hi Tony,

Only 200 oz/in to drive the Z of a Myford? I would have expected much more!
I've got several 350's that aren't big enough for my RF-31 mill. Thus
they'd be great for a Myford! (if I had a Myford).

What uP does your Division Master use? I'm involved with both MicroChip
F184550 chips and Atmel AT91SAM7 chips. Both have USB. I got the AT91 to
talk both ways last night via USB (device). At workwork we got the 2nd
round of prototype boards for my industrial laundry controller project in
last night, trying to get it populated today. It has USB device AND Host
('380 chip added). Nice graphics LCD display, 6-key keyboard, and enough
outputs to drive several steppers! That could make an interesting board for
a CNC project!

Best regards,

Alan KM6VV

> Bill -
>
> Not a whole lot to report as yet - I have motorized the leadscrew
> (see the pic on the CCED front page here:
> http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/ ) using a ~ 200 oz-in
> stepper mounted behind the bed - the Myford has pre-drilled & tapped
> holes along the back of the bed to mount various accessories & the
> motor mount is attached to those. Mount is a piece of Aluminium angle
> with an end plate attached - this has slotted holes to allow the
> motor position/belt tension to be adjusted. Drive to the leadscrew is
> 2:1 reduction using HTD toothed belts/pulleys.
>
> <snip>
>
> So far I haven't started on the cross-slide adaptation, but with the
> setup as is I can use my Divisionmaster controller
> (www.divisionmaster.com) to generate fine feeds and to cut accurately
> to a shoulder. This is slightly less than ideal as the DM operates in
> degrees - I have to fudge the worm ratio it thinks it is working with
> to make 10 degrees on the screen correspond to 1" of movement, or
> whatever. So at some point I want to change my firmware to give a
> sensible linear readout, and to simply convert between metric and
> imperial.
>
> Ideally, the DM firmware would also be converted to perform the
> electronic gearbox function that has been discussed elsewhere in this
> thread. As with everything, too much "work work" intervening at present.
>
> With the cross slide motorized I will probably go for Mach as the
> driver, but as I have several PCs lying around that are underpowered
> for Mach/parallel port, a solution using a USB device would certainly
> be appealing.
>
> Will post more as it develops further, but it may take some time!
>
> Regards,
> Tony