[solved] Makelangelo 3 nema steppers run extremely hot
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Hello, due to the very good support pages I assembled the Makelangelo 3 quickly and everything seems to work fine. Board and control panel are working, stepper motors and servo running in the right directions. Power supply is a 12V/5A supply, the system is controlled by Mac OSX. But when testing the Nema 17 steppers without any mechanical load, I mentioned, that the stepper motors run extremely hot after a short time.
A second problem (perhaps with no connection to the first one): After changing the speed of 2000 mm/min in the control software, it was hard to retype these digits again, the software always tried to correct to a value of 20
At the moment I don`t dare to continue testing, I don`t want to damage this nice little machine.
Any idea?Running hot is normal. You may find that adjusting the potentiometers on the polulus will help.
There is a small screw head on each of the 6 chips on the RUMBA board. with the power off turn the screws 1/8″ or less counter clockwise. This will reduce the total amps to the motor. it should run at a lower temp. Turn it too low and the motors will shake because they don’t have enough go juice to pull the belt. If that happens turn it back up a small amount.
Small amounts have big effects here so take your time and go slowly.Sometimes the software likes to select a value in a text field and as you type it smashes the numbers. I haven’t found why this happens. I’d love some help figuring it out.
Does this help?
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