Tdeagan wrote:This could be caused by the x-axis motor not getting sufficient amperage and missing steps. The Printrboard has trim pots (one per motor,) which can be adjusted to provide more power. Turn them incrementally clockwise to get more power (don't go so far that the motor starts running hot.)
There may be other PB Simple-specific problems that I'm not familiar with relating to the string, but the motor amperage could be one thing to check.
bradleyc wrote:If your calibration cube is slipping, then your prints will slip as well. The motor is not skipping the steps, it is either motor's shaft slipping on the tube or the tube slipping on the string. Once you have the tube into the shaft exactly where you want it, put a few drops of super glue between the tube and shaft. Do this as well as securing the zip tie over it. This will help the tube grip tighter to the shaft. Sometimes you can't see the slippage, but there's microslippage that will cause your prints to screw little by little. It adds up. So after doing that, wrap two or three loops of string around your tube. Do this as tight as you can. Do this for both the X and Y axis.
If you have already done this, then the problem is a software problem and I will give you further help if it is. But try the above method first.
IAfter running a print, the motors are hot to the touch.. The x motor I can even feel heat coming through the wood it is enclosed in. Could it be a problem in the opposite direction, too much amps? It seems to only slip on really short movements in the x direction, where there is a lot of going back and forth...
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