Ramps 1.4 - Motor working now but not with Sprinter firmware. Help please.
August 02, 2016 05:41AM
I am making a resin printer using a dlp projector and trying to use one motor to control the z axis. I have installed the Ramps 1.4 test code. The lights are blinking but the motor is not moving. Here are the links to the ramps, power supply, motor and motor specs.


Ramps 1.4 with audrino board : [www.amazon.com]
Power Supply: [www.amazon.com]
Motor: [openbuildspartstore.com]

Motor specs: [cdn1.bigcommerce.com]


I have installed power to the bottom portion. So there is only one pair of wires for the power supply.

I would greatly appreciate the help. This is the last thing that I have to get working and then I can get to printing with it.

Edited 1 time(s). Last edit at 08/04/2016 03:16AM by Clay_printer.
Re: Ramps 1.4 - Motor not working. Help please.
August 02, 2016 12:33PM
Could be a lot of reasons, why it doesn't spin.

Current on the driver to low
Driver mounted in wrong direction
stepper cables wrong
Forgot to put microstepping jumpers under the driver
Re: Ramps 1.4 - Motor not working. Help please.
August 02, 2016 03:23PM
Thanks for the response. I do have 3 jumpers placed. I will be tweaking the current and voltage later tonight see what will happen. I don't have a multimeter yet. I am surprised that there is just nothing happening with the motor. No signs of it working at all. No sounds even. Can you please explain the first 3 that you listed and how would that be fixed. Would it be adjusting the screw on the polulu or the screw on the power supply?
Re: Ramps 1.4 - Motor not working. Help please.
August 03, 2016 03:20AM
Current adjustment is done by turning the potmeter on the driver. See more at the Wiki.
I'd go for 1.0V max. for your 1.7A steppers ( with A4988 drivers and 0.1R shunts )

I killed a few drivers, because I didn't know DRV8825 drivers had the potmeter at the opposite side of the PCB.
That's why I wrote about driver orientation...

Stepper cables usually are black, green, blue, red.
In rare cases you have a different connector ( eg. with 6 wires )

You've built a DLP resin printer and do not own a multimeter eye popping smiley
Cudos, if you get it working.
Are you using 405nm laser diodes?
Re: Ramps 1.4 - Motor not working. Help please.
August 04, 2016 03:15AM
Well, I borrowed a Multimeter from a friend and I had just adjusted the power supply and the polulu driver. Now the motor works with the Test code. Now I just need to get the sprinter code to work. Or maybe I should use Marlin. I am making top down dlp printer instead of a down up one. Much easier to make and I have set the projector as an extra screen so that creation workshop can use that as the image displayed. Instead of it reading off of my computer screen's display. If I can get the motor to work with the sprinter firmware while using it in creation workshop then I can have a print going by this weekend. Thanks for the help. Thing is now I am just trying to get it to work with the the creation workshop if you have any troubleshooting tips that would help me, please tell me. I will continue to figure it out.
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