MesaCT and 7i76eu Issues with generated configuration

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LearningLinuxCNC
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04 Dec 2025 02:06 #339710 by LearningLinuxCNC

MesaCT and 7i76eu Issues with generated configuration was created by LearningLinuxCNC

It could be that I am an imbecile. However when I used MesaCT as installed per the instructions here using apt gnipsel.com/linuxcnc/mesact/install.html#install-with-apt. I did not get an anywhere near working configuration out of the tool. The stepper configurations were very incomplete. The feedback loop was not closed in fact the PID output was not even sent to the mesa stepper driver.

I will post up my configuration files from the output shortly.

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LearningLinuxCNC
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04 Dec 2025 22:57 #339748 by LearningLinuxCNC

Replied by LearningLinuxCNC on topic MesaCT and 7i76eu Issues with generated configuration

Here is a generated HAL file X axis configuration.

# Axis: X Joint: 0 Output: 2
# PID Setup
setp pid.x.Pgain [JOINT_0](P)
setp pid.x.Igain [JOINT_0](I)
setp pid.x.Dgain [JOINT_0](D)
setp pid.x.bias [JOINT_0](BIAS)
setp pid.x.FF0 [JOINT_0](FF0)
setp pid.x.FF1 [JOINT_0](FF1)
setp pid.x.FF2 [JOINT_0](FF2)
setp pid.x.deadband [JOINT_0](DEADBAND)
setp pid.x.maxoutput [JOINT_0](MAX_OUTPUT)
setp pid.x.error-previous-target True

# joint-0 enable chain
net joint-0-index-enable <=> pid.x.index-enable
net joint-0-index-enable <=> joint.0.index-enable

net joint-0-enable <= joint.0.amp-enable-out
net joint-0-enable => pid.x.enable

# position command and feedback
net joint-0-pos-cmd <= joint.0.motor-pos-cmd
net joint-0-pos-cmd => pid.x.command

net joint-0-pos-fb <= hm2_[MESA](BOARD).0.stepgen.00.position-fb
net joint-0-pos-fb => joint.0.motor-pos-fb
net joint-0-pos-fb => pid.x.feedback

# PID Output
net joint.0.output <= pid.x.output

# Axis: Z Joint: 1 Output: 3

This is what I had to change it to in order to make it work properly.

# Axis: X Joint: 0 Output: 2
# PID Setup
setp pid.x.Pgain [JOINT_0](P)
setp pid.x.Igain [JOINT_0](I)
setp pid.x.Dgain [JOINT_0](D)
setp pid.x.bias [JOINT_0](BIAS)
setp pid.x.FF0 [JOINT_0](FF0)
setp pid.x.FF1 [JOINT_0](FF1)
setp pid.x.FF2 [JOINT_0](FF2)
setp pid.x.deadband [JOINT_0](DEADBAND)
setp pid.x.maxoutput [JOINT_0](MAX_OUTPUT)
setp pid.x.error-previous-target True
setp pid.x.maxerror 0.0005

# joint-0 enable chain
net joint-0-index-enable <=> pid.x.index-enable
net joint-0-index-enable <=> joint.0.index-enable

net joint-0-enable <= joint.0.amp-enable-out
net joint-0-enable => pid.x.enable
net joint-0-enable => hm2_[MESA](BOARD).0.stepgen.02.enable

# position command and feedback
net joint-0-pos-cmd <= joint.0.motor-pos-cmd
net joint-0-pos-cmd => pid.x.command
net joint-0-vel-cmd <= joint.0.vel-cmd


net joint-0-pos-fb <= hm2_[MESA](BOARD).0.stepgen.02.position-fb
net joint-0-pos-fb => joint.0.motor-pos-fb
net joint-0-pos-fb => pid.x.feedback

# PID Output
net joint.0.output <= pid.x.output
net joint.0.output => hm2_[MESA](BOARD).0.stepgen.02.velocity-cmd

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