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  • andypugh
  • andypugh's Avatar
05 Sep 2025 08:34
Replied by andypugh on topic Troubles to get started with SD240 Retrofit

Troubles to get started with SD240 Retrofit

Category: Turning

You can test the index-enable system by hand.

Open halshow (this is "show machine configuration" in Axis, in some other interfaces you may need to open a terminal and "halcmd loadusr halshow"

Add the x-index-enable signal to the Watch tab. I think you should see a button that allows you to set it.

Then rotate the motor by hand, and see if the index-enable signal ever goes false.

Hint, the colour scheme of halshow is eccentric. dark red = 0 / false and yellow = 1 / true
  • andypugh
  • andypugh's Avatar
05 Sep 2025 08:34
Replied by andypugh on topic Troubles to get started with SD240 Retrofit

Troubles to get started with SD240 Retrofit

Category: Turning

You can test the index-enable system by hand.

Open halshow (this is "show machine configuration" in Axis, in some other interfaces you may need to open a terminal and "halcmd loadusr halshow"

Add the x-index-enable signal to the Watch tab. I think you should see a button that allows you to set it.

Then rotate the motor by hand, and see if the index-enable signal ever goes false.

Hint, the colour scheme of halshow is eccentric. dark red = 0 / false and yellow = 1 / true
  • andypugh
  • andypugh's Avatar
05 Sep 2025 08:01
Replied by andypugh on topic Y axis A slave help request

Y axis A slave help request

Category: General LinuxCNC Questions

Are the stepper motors locked or free when they should move and don't?

There is a "quirk" in Stepconf that "Test axes" doesn't set the drive "enable" pins.
(Running the full system would, if the enables are configured)

Many stepper drivers have a "not-enable" input, which turns the drive off when high. (It's typically a waste of an IO pin with stepper motors)

If the motors are locked then the drives are enabled, and for some reason the step pulses are not being seen. If they are free then suspect the enable logic.
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