Encoderinputs 7I77 and 2X encoder input + 2x THCAD

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03 Jun 2022 09:25 #244493 by TomOD
Hello everyone,
 
We are trying to develop a plasmacutter with 2 servomotors(X&Y) connected to the encoder 01 and 02 of the 7I77. The Z-axis is a stepper motor.
On the encoderinput 03 we have connected a THCAD that measures the Arc voltage. This works fine.
We want to connect a second THCAD to encoderinput 04 to measure the voltage of the ohmic sensing. I think we configured it not good, but when we check the  HAL watch. The encoder.04.count stays on 0.

The connections are good because when connected it to encoderinput 3 and then it counts. We also connected it to encoder05 and this one stays also on 0.

We tried everything we could but nothing helps. I hope the guys on the forum can help us.

Best regards from Belgium.

Tom

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03 Jun 2022 12:07 #244513 by tommylight
Attach the hal and ini files here so we can have a look.
Tom
:)

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05 Jun 2022 13:10 #244612 by TomOD
I will upload thes files next week. The machine is on school en I can't get acces to these files at home. In my description I made a mistake:
-Encoder 00 = X-axis
-Encoder 01 = Y-axis
-Encoder 02 = first empty but now THCAD for Ohmic sensing
-Encoder03 = THCAD for THC
-Encoder 04 = empty
-Encoder 05 = empty

We tried to make the ohmic sensing work on encoder input 4 and encoderinput 5 but it didn't want to work. Then we tried 02 and it works. but we don't know what we did wrong on encoderinput 04 and 05.

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09 Jun 2022 23:56 #244831 by andypugh

but we don't know what we did wrong on encoderinput 04 and 05.

What do you have in INI / HAL for "num_encoders" ? 
 

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10 Jun 2022 02:40 #244843 by PCW
My WAG as to why some channels aren't counting is that they are in quadrature
mode rather than counter mode.

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