mesa 7i76 configuring a spindle encoder

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10 years 7 months ago #71786 by andypugh
Replied by andypugh on topic mesa 7i76 configuring a spindle encoder
What doesn't work as things are now?

Open a halmeter and look at motion.spindle-revs

If that increases by 1 for one rev of the spindle you are probably all set.

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10 years 7 months ago #71789 by Clive S
Replied by Clive S on topic mesa 7i76 configuring a spindle encoder
Ok no joy with motion.spindle-revs but the voltage on the index at the 7i76 pin TB3 13 changes from 5V to 0V when the chuck is rotated

edit I am using this as single ended input

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10 years 7 months ago #71791 by andypugh
Replied by andypugh on topic mesa 7i76 configuring a spindle encoder
What do the other two inputs do?

What is the ...enc0.position pin doing?

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10 years 7 months ago #71794 by Clive S
Replied by Clive S on topic mesa 7i76 configuring a spindle encoder
quote What is the ...enc0.position pin doing?

Can't seem to find that. Do you think I have it conned ok is there any thing to add in the ini file?

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10 years 7 months ago #71796 by andypugh
Replied by andypugh on topic mesa 7i76 configuring a spindle encoder
I don't know the pin name (I don't have a 7i76). Do you have any pins that contain "enc" in the name?

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10 years 7 months ago #71798 by Clive S
Replied by Clive S on topic mesa 7i76 configuring a spindle encoder
can't see any

hm2_5i25.0.encoder.00.position




Attachment not found

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10 years 7 months ago #71800 by andypugh
Replied by andypugh on topic mesa 7i76 configuring a spindle encoder

Clive s wrote: can't see any
hm2_5i25.0.encoder.00.position



That's probably the one. ....enc0 is one of the optional MPG channels, now I think about it.
Sorry for the confusion.
Does hm2_5i25.0.encoder.00.position change value as you rotate the spindle?

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10 years 7 months ago #71802 by Clive S
Replied by Clive S on topic mesa 7i76 configuring a spindle encoder
Andy Looking at hm2_5i25.0.encoder.00.position when triggering the opto from 5V to 0V the hal meter stays on 0 and does change

I have taken my encoder disk off so that I can make sure the ir light is blocked for testing

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10 years 7 months ago #71804 by andypugh
Replied by andypugh on topic mesa 7i76 configuring a spindle encoder
It sounds like you only have one channel? And you mentioned the index earlier?

The position won't change if you only drive the index pin.

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10 years 7 months ago #71807 by Clive S
Replied by Clive S on topic mesa 7i76 configuring a spindle encoder
Andy I have just thought. the 7i76 has IDX+ and IDX- I have not grounded the IDX- also A+ and A- etc Do you think I need to ground the (0v) IDX- A- etc

which hal pin should change just with IDX connected

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