Hi there.
I’m retrofitting old (1994) cnc machine . It came disassembled. I found in this forum one electrical schematic and fits ok in what I have. Decided to move on and use MESA drivers (7i92+7i77).
At the moment a can move xyz axis and spindle (all analog +-10v) and only by the pncconfig wizard. I din't touch, too much, hal and ini files.
The problem i have is in the spindle control. The spindle has one encoder that goes direct to SPM module, so, how to get spindle feedback to 7i77? can i strip the cable and use A-A B-B and R-R to 7i77 and maintain the cable connected to SPM (maybe 5v power issues here)?
Can't figure out how the original cnc control could manage trheading comands, etc. Is the analog +-10v capable to handle with precision the spindle control without feedback?
The SPM module had connected other lines:
- enable, FG ( I assume 24v from 7i77)
- spindle in position POS (assuming 24v to 7i77), after M19 reference signal
- spindle stop, n=0 (assuming 24v to 7i77)
- M19 (assuming 24v from 7i77 to stop in reference position)
If i have spindle feedback encoder to the 7i77 don't need the avobe comands n=0 and POS? Linux cnc can handle with all this issues?
Now is time to get hands on hal and ini files, but no experience on this. First time on linux.
Tomorrow more pics about the project.
