cnc Bosch cc100m retrofit

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.

hi welcome
all German so i guess i try !

die SPM braucht diese Signale als freigabe von der Controll software
das heist deine Remap M6 sollte diese signale zur SPM geben

ist da ein Wechselarm angeschlossen oder nur ein ATC

schau dir mal das an
forum.linuxcnc.org/20-g-code/33837-m19-spindle-orient

die SPM bekommt dan noch diese anforderung mit
Spindle in position
Spindle off

@tom ist just the ATC logic SPM module not the Servo controller the M19 is the enable

Hi.
SW+ and SW- is the analog input for speed reference. +- 10v.

My deckel FP4nc use the same

Regards
Henk

its now a quite time as he dident sned more Images i guess he solved the problem on its own

I’m around the wires…
When the SPM is enabled, 24v on FG, the spindle starts drifting/vibrating. There is a tiny screw to adjust the rotation, when enabled with no voltage (sw+ sw-). Maybe some MESA voltage offset to adjust this behavior.

If I connect 24v to M19 terminal, led n=0 turns on and led POS turns on also, spindle rotates always to the same angular position and holds with torque, so this is the reference to ATC (later…). If disconnect 24v on M19 the spindle, slowly, continues slowly drifting.
So at the moment I need wiring 2 outputs and 2 inputs from 7i77 (enable, M19, n=0 and POS).

The main issue here (i think) is about the spindle angular/position feedback to 7i77. The spindle encoder (1000 lines TTL) is connected to the SPM. Doesn’t work not connected. Tapping cycle with no kind of feedback?? Or, the +-voltage from 7i77 must be so precise, so fine tuning that assures the correct rpm?

I’ve also measured the voltage on n=ns terminal (it wasn’t used). When the spindle is on high rpm the voltage is low and low rpm the voltage is high. Don’t know if could be used to confirm rpm.

So at the moment my doubts are about the spindle feedback and I’m looking to something kinda terminal/window to see and test the inputs and outputs on 7i77. There is some app to install and see this?
I haven't started messing with the ini and hal files yet

You have standoffs behind those mesa boards?

Just simple nylon spacers