Maho MH800e Retrofit Project
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24 Oct 2025 14:50 #337064
by Cooped-Up
Replied by Cooped-Up on topic Maho MH800e Retrofit Project
I already wired in another small 12v PSU, it powers something on the heidenhain impulseformer so I'm not sure if that would introduce noise into the encoder input but I do have buck converters as well now that you mention it.
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24 Oct 2025 14:54 #337065
by Cooped-Up
Replied by Cooped-Up on topic Maho MH800e Retrofit Project
Another note on this, I don't have home limits, just the index it looks for. This could be the stem of my issue but the reference machine I am "copying" is the same setup with no limits just search for the index
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24 Oct 2025 15:17 #337070
by PCW
Replied by PCW on topic Maho MH800e Retrofit Project
I would verify that the index works by manually setting the index enable signal
for the tested joint (via the halcmd sets command) and then manually moving
the axis past the index mark to see if the index enable signal gets cleared
at the index mark.
for the tested joint (via the halcmd sets command) and then manually moving
the axis past the index mark to see if the index enable signal gets cleared
at the index mark.
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24 Oct 2025 15:34 #337074
by Cooped-Up
Replied by Cooped-Up on topic Maho MH800e Retrofit Project
that seems like an easy enough check. Ill do that after I get home from work!
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24 Oct 2025 16:58 #337075
by Cooped-Up
Replied by Cooped-Up on topic Maho MH800e Retrofit Project
So on the z axis I did manually set the z enable and jogged to where the index was and it did turn off. I then tried changing the final velocity to invert it from the starting velocity of homing to make it come back instead of continuing into the E stop limit and that did not change its behavior it still goes past and it's homing sequence to the E stop
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24 Oct 2025 20:19 #337084
by andypugh
Replied by andypugh on topic Maho MH800e Retrofit Project
You might need to force home-sw-in high, so that it always thinks it's on the switch, and then it will set the index-enable.
ie, in the HAL file:
sets joint.0.home-sw-in 1
ie, in the HAL file:
sets joint.0.home-sw-in 1
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24 Oct 2025 21:10 #337091
by Cooped-Up
Replied by Cooped-Up on topic Maho MH800e Retrofit Project
It does set the index enable currently it just sails right by it when homing
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24 Oct 2025 21:47 #337093
by PCW
Replied by PCW on topic Maho MH800e Retrofit Project
Is index-enable connected to both motion and the driver?
If the encoder index (something like hm2_cardname.0.encoder.00.index-enable)
has been set but is not ever cleared when the index location has been passed,
that suggests a hardware issue with the index signal itself.
If the encoder index (something like hm2_cardname.0.encoder.00.index-enable)
has been set but is not ever cleared when the index location has been passed,
that suggests a hardware issue with the index signal itself.
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24 Oct 2025 21:51 #337094
by Cooped-Up
Replied by Cooped-Up on topic Maho MH800e Retrofit Project
in testing the "Z" axis right now I have it passing the index point, it turns off the enable signal, seems to hesitate for a split second before continuing to the estop hard limit
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24 Oct 2025 21:57 #337095
by Cooped-Up
Replied by Cooped-Up on topic Maho MH800e Retrofit Project
watching the "DRO" the z axis zeros then moves, hits the index, zeros, and then hits the estop. I have the offset set to 0 so it should just stop correct?
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