Crusader II retrofit

PCW

You posted this on another posting.

One option is to tie each inhibit input (J1 pin to common (J1 pin 9)
with a 1K resistor. This will have the effect of disabling all axis by pulling pin 8 down to ground.
Then connect the ENA+ pins on the 7I77 to the drives J1 pins 10 (+15V)
and the ENA- pins to the drives inhibit input (J1 pin 8 ).
This will pullup the inhibit lines and enable the drives when analog enable is true in the hal file

Lets say thats how I believe I connected them..

Note: the first machine it was posted to was a Crusader M mine is the older Crusader II.

Jim

OK thats the enable modification
(which seems to be working since LinuxCNC can enable and disable the drives)

The problem seem to lie in the analog output connections
from the 7I77 to the drives (or perhaps HAL problem of some kind)

The next step is to trace the PID output, say pid.x.output with halmeter when you attempt to jog
if this works, ( you get a correction value proportional to the position error )
then you need to check the wiring from the 7I77s analog outputs to the drives
(as before P should be something like 1 to 5 for these initial tests (and all other 0)

OOPS looks like I neglected to connect (6) important wires. Sig and Com to each of the axis at TB5.
So off to the big city to buy more supplies.

forgetful
Jim

Hey, on the drive to town I started thinking about the connections going into the Anilam Control Box. In the picture below I will be taking the first (6) wires "AX SIG and AX COM and rerouteing them to the TB5 connections on the 7i77. How hard would it be to take all the connections and route them through the 7i77's TB8 and completely remove the Anilam Control Box.





Thanks
Jim

Get it running first then you probably can redo the rest of the circuits to the 7i77

Okay
I jury rigged another wire from the A-B in the picture above to the ENA0 - COM on TB5. And X axis jogs back and forth in continuous and also moves 1.000 on the linuxcnc readout in increment 1.0. But there is the dreaded dither while holding location. The readout moves back and forth between 1.0002 and 0.9998 while the hand wheel moves slightly back and forth..
Should I test with the current setup moving the A-B feed into the other axis and try jogging them?

As side Note:
When I powered it back up the main relay was heard to engage but the drives didn't come on....panic. After much sole searching I noticed X was on the limit as I had move X and Y out for room to access the servo cabinet. Off limit try again ?! still no servo power uuurrrrr. Oh hello the Y axis also is at the limit... no that's not it.... Oh yeah I did some manual machining last night and switched to manual on the back of the servo box... FINAL the servos came up when the power switch on linuxcnc was pressed the motors started whining (almost as load as I am) and ....... It jogged...happy day (30mins later)
Jim