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Re: Marlin + RAMPS 1.4, spinning motors?

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Dust
Lots of questions to help diagnose your issue..

Do you have 12v wired into the 12v 5amp ramps power socket? this is used to power the steppers. is this power supply on?

Yes, it is a 12V power supply that can supply up to 4 amps.

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Dust
Is the Stepper driver plugged in the correct way? Please provide clear photo of the board as it is currently wired. See if we can see anything

I've checked it over with several people. If there were pulses being output then the stepper motor would twitch, correct? Yet there is not so much as "locked resistance", i.e. no direction supplied to the motor but power supplied to the motor.

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Dust
Is the stepper wired correctly, if you have followed any color based diagrams its probably wrong. Identify the coils and make sure coil one is on pins 1 and 2 and coil two is on pins 3 and 4 of the stepper plug. More info here

I am completely sure that the wiring is correct. My Sainsmart RAMPS 1.4 has the pins labeled as 2B, 2A, 1A, 1B, which seems to be the reverse of what one would expect, but either way I have taken this into account.

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Dust
Have you set the correct board type in your firmware (normally 33 for a ramps)

That I have.

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Dust
Have you adjusted vref (slightly different depending on your driver) eg [reprap.org] eg [reprap.org]

I have not tried this yet, at least not so methodically. I tried turning the pot numerous rotations in either directions while telling the motor to move back and forth, yet nothing happened.

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Dust
Are there 3 microstepping jumpers plugged in under your stepper drivers?

I hadn't tried that. However, I plugged in various combinations of one, two, and three steppers and got nothing each time.

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Dust

Do you have endstops configured or disabled? (If they are enabled, you cant move in the direction that is triggered) check with a m119 command to the board

I didn't really attempt to configure them, I figured that since they weren't plugged in the signal to stop the motors would never be given and the motors would run. Perhaps I am incorrect?

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Dust
And finally what type of stepper is it? as some just need to much current or voltage and aren’t suitable to be driven from a pololu type stepper driver.

The driver is an A4988, the motor is a LIN Engineering 417-15-03-14RO. 1.2 A and should work with 12 V.

Thank you for your patience =)

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