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- Can not get stepper motors to move with Gecko g250x drivers
Can not get stepper motors to move with Gecko g250x drivers
21 Apr 2024 20:24 #298799
by PCW
Replied by PCW on topic Can not get stepper motors to move with Gecko g250x drivers
Might try a LED + ~220 ohm resistor on the G250 step pin
(anode to step pin) This should show the step pulses as a dim glow
(anode to step pin) This should show the step pulses as a dim glow
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- moretoyswins
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21 Apr 2024 21:53 #298801
by moretoyswins
Replied by moretoyswins on topic Can not get stepper motors to move with Gecko g250x drivers
I have searched hi and low, but don't have anything close to a 220 ohm resistor. Not much of an electronics person these days. So, I will have to get some tomorrow.
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21 Apr 2024 22:23 #298802
by PCW
Replied by PCW on topic Can not get stepper motors to move with Gecko g250x drivers
anything from 100 Ohms to 2K Ohms should be OK
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21 Apr 2024 22:44 #298803
by moretoyswins
Replied by moretoyswins on topic Can not get stepper motors to move with Gecko g250x drivers
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21 Apr 2024 23:40 #298805
by PCW
Replied by PCW on topic Can not get stepper motors to move with Gecko g250x drivers
A couple paralled 2.8Ks would work
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22 Apr 2024 03:21 #298810
by moretoyswins
Replied by moretoyswins on topic Can not get stepper motors to move with Gecko g250x drivers
I am sorry, I have tried several times to reply but I have been getting Kunena errors.
My electronics theory is lacking, and dated!
I remember something about Ohm's law and think it applies here. I would have to Google it to understand how resistance in parallel or series works.
I ordered some 220-ohm resistors, and when they arrive tomorrow, I will try the test with a resistor and LED.
I appreciate the help and insight! I will update you as soon as I can do the test.
My electronics theory is lacking, and dated!
I remember something about Ohm's law and think it applies here. I would have to Google it to understand how resistance in parallel or series works.
I ordered some 220-ohm resistors, and when they arrive tomorrow, I will try the test with a resistor and LED.
I appreciate the help and insight! I will update you as soon as I can do the test.
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23 Apr 2024 00:06 #298877
by moretoyswins
Replied by moretoyswins on topic Can not get stepper motors to move with Gecko g250x drivers
So tested my led configuration against the ground and 5v terminals TB1-1 and TB1-6 and it glows. But I get no indication of light when connected to TB1-1 and TB1-3 but I do get light connected to TB1-1 and TB1-2.
So, any ideas what I have wrong in the board config to cause that?
Thanks!
So, any ideas what I have wrong in the board config to cause that?
Thanks!
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23 Apr 2024 00:28 #298878
by tommylight
Replied by tommylight on topic Can not get stepper motors to move with Gecko g250x drivers
How are the Geckos wired to Mesa? Picture?
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23 Apr 2024 01:00 #298880
by moretoyswins
- Blue wire is Direction connected to TB1-5
- Light Brown wire is Step connected to TB1-3
- Yellow/Green wire is Ground connected to TB1-1
- Blue wire is Direction connected to 30p Terminal Block pin 27
- Light Brown wire is Step connected to 30p Terminal Block pin 28
- Yellow/Green wire is Ground connected to 30p Terminal Block pin 30
30 pin ribbon cable connections to G250X
Replied by moretoyswins on topic Can not get stepper motors to move with Gecko g250x drivers
- Blue wire is Direction connected to TB1-5
- Light Brown wire is Step connected to TB1-3
- Yellow/Green wire is Ground connected to TB1-1
- Blue wire is Direction connected to 30p Terminal Block pin 27
- Light Brown wire is Step connected to 30p Terminal Block pin 28
- Yellow/Green wire is Ground connected to 30p Terminal Block pin 30
30 pin ribbon cable connections to G250X
Attachments:
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23 Apr 2024 01:07 #298881
by PCW
Replied by PCW on topic Can not get stepper motors to move with Gecko g250x drivers
You should get a DIM glows from and LED connected from GND (TB1 pin 1)
to STEP0+, (Cathode on GND) but only when you jog X.
I would expect and LED connected to STEP0- (TB1 pin2) and GND
to glow brightly all the time as STEP0- will be high most of the time and
only go low when a step pulse occurs
You should be able to reverse the roles of STEP0+ and STEP0-
by inverting the step output. You can do this live with halshow
(Machine --> Show Hal Configuration) and setting:
hm2_7i96s.0.stepgen.00.step.invert_output
true
to STEP0+, (Cathode on GND) but only when you jog X.
I would expect and LED connected to STEP0- (TB1 pin2) and GND
to glow brightly all the time as STEP0- will be high most of the time and
only go low when a step pulse occurs
You should be able to reverse the roles of STEP0+ and STEP0-
by inverting the step output. You can do this live with halshow
(Machine --> Show Hal Configuration) and setting:
hm2_7i96s.0.stepgen.00.step.invert_output
true
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