Hi all,
I built a CNC from openbuilds.com (it called the “OX”). I have been having problems with it. It would miss steps and the drivers would heat up after 10-15min even after using heat sink and a cooling fan.
Here’s my setup:
X-axis motor: 1 Nema 23 (2.8A per phase)
Y-axis motor: 2 Nema 23 (2.8A per phase) attached to a single Y-axis
Z-axis motor: 1 Nema 23 (1.68A per phase)
12V, 30A power supply
Controller Board: openbuilds.com/builds/laser- … nsion.515/
After a lot of reading, I suspected it could be the Vref volts but I have checked it multiple times (with motors disconnected and the drivers in full step mode). The Vref for Nema23s have been adjusted to 1.4V and for Z-axis it has been adjusted to 0.84V. After adjustment, I put the board to do 32 microsteps and check the Vref again and it remains the same. The motors run smoothly without making any noise but after 10min or so it will miss the steps (either X-axis or Y-axis but not Z-axis) and the driver boards will get really hot even after heatsink and cooling.
Could this be happening because I have attached 2 nema23s on a single Y-axis? (I have seen people do this online but they don’t seem to have any problems) - Am I doing anything wrong here?
It is very frustrating that this thing is ruining my projects. Please help!!
P.S: I am very new to all this so please be as detailed as possible in your answers/suggestions
Thanks!