by Roberto, published
I do not like that.
I looked at some designs for fans mounted to the motors, but they only did the X and Y motor.
With this solution you can do the X-,Y- and Z- Axis and bring the heat outside of the printing area
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Arnaud, Thanks for the tip. (I thought there was no fluid in there and that the conductivity of the copper was the most important factor)
The reason for mounting these the way I did was that I do not want to loose build space.
So I will accept the less than optimal efficiency.
I didn't know that the motors were specced up to 80 degrees.
Anyway, the "hot" thing is a personal thing.
I do not like my electronics and motors to run more than hand-warm and these cooling thing work for that.
(It even gives some meaning to the death of 3 laptops <smile>)
I have no Idea where the pololu stepper driver is and how I can tune it so I have some googling to do there.
It is not an option I have seen in my cura settings. (but maybe I am looking but not seeing)</smile>
(better late than never reply...) You do not need to cool your motors in a stock UM. These motors are specced up to 80 degC: that is way more than hand warm. Of course you may paint your motors pink, immerse them in an oil bath or cool them down to 0 degC, but there is no engineering need for that at all.
If you think your motors are running hot, the logical thing to do is to turn down the current a little so they get less warm. You can do that on the pololu stepper driver.
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I used 2 old broken HP nc6120 and one broken HP nc 6320 because they have copper heatpipes.
Because of the available screws I had to widen one of the holes.
Furtermore I have bent a small ridge outwards.
The right hand side motor is the most easy.
Drill a small hole in the frame for the right screw and a larger one for the screw on the left.
The fit is good and the heat gets transported outside of the frame.
(I have added some distance blocks to protect the heatpipe)
The left hand side is more complicated. The headpipe needs to be bent to avoid blocking access to some switch screws.
The connection to the motor is also less than with the right hand side motor.
This can be fixed by using the paste that is used with ICs
The Z-axis motor is very comparable to the right hand side motor.
Fixed with just 2 screws.
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