I was trying to calibrate my MakerFarm Prusa i3 today & level the bed, when I ran into a strange problem. I was jogging the Y axis in pronterface to level the bed in 10 mm increments. It was moving correctly, then the next time I clicked the 10mm button, it jogged 10 mm in the opposite direction. Thought that was weird, and now it just goes whatever direction it pleases. It won’t “Y-home” anymore now either. Has anyone run into this issue? Should I reinstall pronterface?
I maxed out the current to the Y motor, and I checked belts are tight/ no slippage.
Possibly related error: I will get a “Mintemp” error even though I’ve set the bed and extruder to 0, which won’t allow the x,y, or z motors to jog anymore. I have to shut down everything and reconnect to clear it.
Mintemp errors are generally thrown if a thermistor has a short, or has become disconnected; it’s there to protect you from causing a fire.
Jogging the Y axis issue, is likely the result of a loose connection somewhere. Either a stepper driver isn’t properly seated, or the cords to your motor could be loose. Check that all your connections are secure.
The min temp error can only happen if a thermistor becomes disconnected from your board or the wiring goes “open” for any reason. A shorted thermistor would throw max temp errors. The y axis issue could be loose driver/wiring, or the driver is going bad and only pulsing one coil
No prob @ThantiK usually if you short the leads together you will get the max temp in your temp table displayed. It’s actually a half way decent test, to jump the two leads of your thermistor at the glass bead to see that it does go to the high temp error state
You guys win again… I traced all the wires through the bundles, and I found the issue. The blue wire was severed from that motor. I saw the input on the ramps board was secure, and it was coming out of the motor itself. I have no idea how this happened. Time to solder/shrink wrap repair.