Hi guys im new to this community!i just finished assembling of a velleman k8200 kit and i have a problem in y axe. If you listen to the video you will listen the noise of the motor and when i move it it seems that it stucks like loosing steps. The belt is too tight maybe this is a problem? Finally i saw that i should change the voltage. So i should use a plastic screwdrive in the hole of the motor? Thank you guys for your answer!
it is about voltage and not capacity…so metal shouldn’t be a problem. also you can easily measure the voltage with a voltmeter right from the screwdriver. ? well at least that is what i did on my stepsticks. (Voltage below 1.5 Volts!!)
so i have to measure the voltage and it should be below 1.5volt and if not i should screw the motor?
Sounds like the motor is under powered
,it may be the potentiometer on your stepper motor you need to turn up the voltage there, google it and see how to do it you literally need to change it 1 degree to make a difference
if someone of you guys have this printer tell me something, in instructions it says i should calibrate the motor drivers in the motherboard.i have done this, so i change the voltage from the motherboard or from the motor?
i just measured the voltage of the drivers and they are all at 0.85v. the manual says 0.42. so i have to lower. the odd is that i thoght they will be lower than 0.42
.41 to .42 as measured from the potentiometer and the Vref pin on the stepper drivers is what you should be aiming for.
.85 is WAY to high. Without caclulating id guess 2-2,5A your motors would be getting very hot as they want about 1A which is at 0.4V although I run pololu drivers so im not sure about other drivers.
Maybe this link will help you :
http://reprap.org/wiki/Calibration#Motor_Calibration