Un-lobotomizing a Maho MH600T

tommylight post=278432 userid=17274Those are nice machines!
The Y moving up/down is not how it should be, Z is for that and probably the 2KW motor will be for that.
Answering your question with a question, did you check the build logs for Maho's on this forum, RotarySMP has a very detailed log here with videos:
forum.linuxcnc.org/12-milling/33035-retr...g-a-1986-maho-mh400e

Maho (and deckel) always have the ram as Z. These are technically horizontal machines, traditionally operated from the right rear side of the table. If you imagine taking a regular mill and flipping it on it back, this is what a maho is.

 

Great job !
I have a question . Where can I buy this integrated circuit " iC-NV chip" .
Looks like furnell doesn't know about this chip
What is the price ?

I have schneeberger linear guides with a built-in linear scale sin/cos 1vpp

I bought them from Elfa:
www.distrelec.biz/en/sine-converter-ic-b...v-tssop20/p/17350855

They are not particularly cheap. I probably ended up spending slightly less than sourcing three EXE:s from ebay. But cost was not really a deciding factor for me.

Can you send please a prototype complete shematic with these chips?
Are these converting uApp sin/cos signals to quadrature? What interpolation they have?

Everything is available on Github:
github.com/finngineering/sincos_interpolator
In the disclaimer I wrote that the latest design (v1.3) is untested. That is no longer completely correct. I have tested it by running one axis back and forth at varying speeds for ~10 minutes, and verified that when I drive it back to the starting position (measured with dial indicator), the position feedback is also back to zero. No issues found. Not all that thorough testing, but at least something.

I use it for 11 µApp Heidenhain scales, but it should be usable also for other types of sin/cos signals. Configuration is made by component selection and jumper solders. Its explained (for 11uApp) on the Github page.

The interpolation is selected by jumper solders between 1 and 16 (not all values available). I use interpolation 5 with 20 µm grating scales, which gives me a resolution of 1 µm (because there are 4 edges per quadrature cycle).

I missed your thread when you first started it. Nice work you are doing in this retrofit. I really like the way you have laid out your control cabinet. They always seem some oversized, untill you start adding wire

Did you pick up that the Maho gearbox control comp is here:
github.com/jin-eld/mh400e-linuxcnc

I recorded all I know about it in the githubwiki:
github.com/jin-eld/mh400e-linuxcnc/wiki

You wrote:
And still another question: What physical indications / push buttons would you recommend for the control panel? I know this is almost like asking how long a rope is, but nevertheless. I plan to get a decent pendant to use for "manual operations" and overrides, and didn't plan to add too much to the main control panel.

Which GUI will you design around?
Have you seen "tom's simple handwheel" from Tom and Peter (Talla83). This is a really well thought out pendant for a Mesa user.