Welcome! Log In Create A New Profile

Pololu's overheating?

Posted by tom10122

tom10122

Pololu's overheating?
August 12, 2013 07:45PM

Registered: 11 years ago
Posts: 68

I am new to ramps, I can print 5 min items fine but after the first 5 min they skip steps and the extruder sometimes will just twitch , no heatsinks just a fan right on top of them . Is the heat the problem?

Reply Quote

Komb'

Re: Pololu's overheating?
August 12, 2013 07:52PM

Registered: 12 years ago
Posts: 198

I've never run the Pololu's without a heat sink. Ecept for when an erant wire or such would knock one off. usually resulting in the loss of the Pololu.

I don't think you can get enough heat disipation without a heatsink. Even if the voltage is perfectly set.

Reply Quote

lajos

Re: Pololu's overheating?
August 12, 2013 07:53PM

Registered: 11 years ago
Posts: 180

The stepper drivers can overheat. Try lowering the motor current.

Adding a heatsink would also help.

Reply Quote

jamesdanielv

Re: Pololu's overheating?
August 12, 2013 08:24PM

Registered: 13 years ago
Posts: 1,797

add a fan to flow over the board. the board has a large gnd pad area that pulls heat away from the chipset. a fan will be the most effective thing you can get over the chipset. using heatsinks may allow running without a fan, but fan is still the #1 failsafe. the polulu board acts like a heat sink also.

Reply Quote

tom10122

Re: Pololu's overheating?
August 12, 2013 08:56PM

Registered: 11 years ago
Posts: 68

i have a fan and it still skips steps

Reply Quote

jamesdanielv

Re: Pololu's overheating?
August 13, 2013 01:10AM

Registered: 13 years ago
Posts: 1,797

what voltage are you running, what type of motors and at what speed are you running your machine at?