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Topic: ZRIB V5 Stepper Motor Drivers getting hot. (Read 536 times) previous topic - next topic

FallenEmpire99

So I tried looking for info on the actual drivers and not the stepper motors themselves and can't seem to find any info but the image linked is the board Im running on my 3D printer and I had issues with the motors skipping so i turned the Voltage up via the pot screws till it just stopped skipping, the motors themselves dont get hot but the actual heat sinks on the driver chips are, i was wondering what could cause this and the best way to cool them since they already have heatsinks and a 5v 120mm fan in front of them, also what would the max temp be for a driver, they've never gone into auto shutdown mode and I had a print run for around 40 hours straight, but they do seem way hotter then they should, like hot enough i can only keep a finger on the heatsink for around a second or two before its to hot. new to all this stuff so sorry if its a stupid question but thanks in advance.

groundFungus

#1
Jun 03, 2018, 02:42 pm Last Edit: Jun 03, 2018, 02:42 pm by groundFungus
Those stepper drivers are most likely A4988 drivers.  Here is the Pololu page for those drivers.  On the page you will find instructions on how to properly set the stepper coil current (little pot).  If you can hold your finger on one for a couple of seconds, it is fine, but it would be best to set the current right for your motors (within the limits of the driver and or motor). 

In this ad there is a photo of the orange version of the A4988 carrier board for comparison with yours.

FallenEmpire99

Those stepper drivers are most likely A4988 drivers.  Here is the Pololu page for those drivers.  On the page you will find instructions on how to properly set the stepper coil current (little pot).  If you can hold your finger on one for a couple of seconds, it is fine, but it would be best to set the current right for your motors (within the limits of the driver and or motor). 

In this ad there is a photo of the orange version of the A4988 carrier board for comparison with yours.
Thank you so much thats exactly what i was looking for  :D

jremington

Good quality stepper motors are designed to run hot, even too hot to touch (60 to 80 C).

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