No steps Mesa 7i76e

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02 Jan 2022 18:21 #230560 by ggsxx
No steps Mesa 7i76e was created by ggsxx
Hi I'm new here and i'm Vincent. So i have been trying to get Linuxcnc to move a stepper motor to move but without success. I can get the Linuxcnc to move in all axis but the stepper don't move. I have tried wiring all 4 wires coming out of TB2 to my tb6600 driver. I tried the different ways of wiring it and changing the steps settings.I know the driver works i checked it with an arduino before installing it. I have resd and tried all the possible wiring to the driver before asking here.I tried checking the pids in all show and some get no response.Not sure if i have everything set right in the hal or ini files.   [attac
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02 Jan 2022 21:06 #230571 by PCW
Replied by PCW on topic No steps Mesa 7i76e
The HAL and INI files look OK
It sounds like an electrical issue if 15000 ns step pulses don't work

Have you tried single ended wiring:

7I76E+5V --> Drive Step+ and Drive Ena+
7I76E Step- --> Drive Step-
7I76E Dir- --> Drive Dir-
7I76E Step+ unconnected
7I76E Dir- unconnected

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02 Jan 2022 22:50 #230587 by tommylight
Replied by tommylight on topic No steps Mesa 7i76e
Also do not wire the enable on the drives until you get things working, it is technically a disable input, not enable.

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02 Jan 2022 23:16 #230590 by ggsxx
Replied by ggsxx on topic No steps Mesa 7i76e
Yes i have tried wiring it that way. That's the way i tested it with the arduino and i have not connected the enable pins.Is there a pid in halshow that would make me see if i get an output to the TB2 Step/Dir 00 ? I'm trying to borrow an oscilloscope from a friend to see if something is coming out the board.

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03 Jan 2022 01:06 #230601 by PCW
Replied by PCW on topic No steps Mesa 7i76e
Also you might try 20000 ns, some drives have very slow OPTOs

You can check the outputs by setting the step mode to quadrature
and moving very slowly (quadrature will not work with your drives but
will give square wave outputs that you can check easily with a LED or voltmeter)

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03 Jan 2022 01:56 #230602 by ggsxx
Replied by ggsxx on topic No steps Mesa 7i76e
I managed to borrow an oscilloscope and no signal are coming ou the mesa card. Is there something that would not enable the stepper signal to go out? There is 5 volts a the gnd and +5v pin of Step/Dir 00 of TB3.

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03 Jan 2022 02:00 #230604 by PCW
Replied by PCW on topic No steps Mesa 7i76e
Watchdog bite?

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03 Jan 2022 02:21 - 03 Jan 2022 02:40 #230606 by ggsxx
Replied by ggsxx on topic No steps Mesa 7i76e
I did watch and no it did not.Here are some pids taken while moving x+.
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Last edit: 03 Jan 2022 02:40 by ggsxx.

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03 Jan 2022 02:43 #230610 by PCW
Replied by PCW on topic No steps Mesa 7i76e
Did you try 20000 on the steplen?
Does the direction signal change when you jog in alternate directions?
What are the static voltages on STEP+, STEP-, DIR+, DIR- ?

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03 Jan 2022 23:47 #230694 by ggsxx
Replied by ggsxx on topic No steps Mesa 7i76e
So i did try putting 20000 on the steplen and nothing.I changed the step type to quadrature. The pid for stepgen positon-cmd doesn't change but the pid for stepgen position-fb does change. Also i'm not shure what you mean by static voltage at step+, step-,dir+,dir-.

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