LittleRP not lifting when it has resin in Petri

Forum dedicated to discussion and technical support centered around the LittleRP affordable, open source 3D resin printer.
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goopyplastic
Posts: 236
Joined: Sat Mar 29, 2014 6:16 pm
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Re: LittleRP not lifting when it has resin in Petri

Postby goopyplastic » Fri Jun 19, 2015 11:54 am

Where the motor screws loose?
After you tightened them will the motor still move without resin in the petri?
Without power turned on does the arm assembly move up and down relatively easily by hand?

goopyplastic
Posts: 236
Joined: Sat Mar 29, 2014 6:16 pm
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Re: LittleRP not lifting when it has resin in Petri

Postby goopyplastic » Fri Jun 19, 2015 2:02 pm

I feel like something is loose, can you check / tighten the 2 m5 buttonhead screws that fasten the top plate into the two rear extrusions? They are the screws on the very top of the machine.

How big is the object you are trying to print? Is it something you have printed before?

If you have or know someone who has experience soldering, you can can try removing the shield and resoldering (just hitting the current solder with the tip of the iron to remelt the solder) that go to the 4 pin motor connector and the 4 pins of the stepper driver that they connect to. Might be an intermittent connection there, if a stepper has a wire unconnected it can run rough.

Scatterplot
Posts: 119
Joined: Mon Jan 12, 2015 12:09 pm
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Re: LittleRP not lifting when it has resin in Petri

Postby Scatterplot » Fri Jun 19, 2015 5:47 pm

I'm no expert but I believe that you can damage stepper motor drivers by unplugging a stepper while it's enabled.

Have you verified you can jog the system with no resin in it since you've tightened screws/checked cables/etc?


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