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I'm looking for a 7i37-COM. Does anyone have one to spare, or is there any way to get a replacement?
Can the old card be repaired? Are there still spare parts available? My old card had a short circuit.

Few ways of doing this.

The way I handled it on a 4th axis plasma build was with a magnet on the rotary and a hall effect sensor sensor to read it. Then sending the rotary back to 0 at the end of the gcode via the post processor.

It's not fool proof (power failures) but it works well enough as I just drive past the home switch then home again the one in 1000 times I have a power failure during running

Could use a 3d printed gear reducer to get a 1:4 rotation and put the sensor on that....so 720 turns into 180.

Help me solve the problem. When creating a panel in qt and embedding it in linuxcnc, a window constantly pops up with the inscription: Qtvcp encountered an error; No handler file was found.
Would you like to copy a basic handler file into your config folder?
This handler file will allow display of your screen and basic keyboard jogging. This happens every time I launch my configuration.

Installing Linuxcnc 2.9.4

Thanks! Unfortunately for turning this change allows it to run but breaks the code for this function.

I've considered picking up an absolute encoder for it. I already had the servos, so I was just trying to use them up. Each axis has a 100:1 harmonic reducer that's belt driven. The belts made the package a bit smaller and allowed me to route the cables through the center of the gear reducers. I'm not concerned about unwinding during a program. I just don't want to shut down the machine at say 400deg and then add another 320deg by always homing in the same direction.

I've got a half baked solution in mind. A while back I made a tool changer and spindle homing procedure from the home all button by calling a halui mdi command and then using g code and I think I might be able to do something similar for this.

Here's the file for the head assembly. It's a fusion archive, so hopefully it included all the components properly. If you want a different format just let me know.

drive.google.com/file/d/1jZTfEVjwmL9wT5n...b-K/view?usp=sharing