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3D Printing Forum Prusa Xi3 Difficulty with motors
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Prusa Xi3 Difficulty with motors

Former Member
Former Member over 9 years ago

Hello, I am having trouble with getting my Prusa i3 motors to move. I have triple checked all of the wiring and physical components, so they are correct. I have set the correct voltage on the motor drivers to their corresponding levels (1.2 for the z axis and extruder, 0.9 for the y and x axis). All other components of the printer function well (such as the heated bed, lcd screen, and extruder heater). I disconnected the wires from all of the motors (which are nema 17 stepper) and every wire on the motor is reading that they are getting 12 Volts (there are four wires to each motor, colored red, blue, green, black). What does this mean? The printer has been turned on multiple times, and there has been no signs that they burned out (no smoke or funny smells, the motors just simply do not move). Also, I have tried both marlin firmware and repetier firmware (the latter being the provided firmware with the kit), both to no avail. I did however have my power set to 220 volts on accident for awhile before realizing the mistake and correcting it to 110. lastly, while troubleshooting to figure out what was wrong, I switched the direction of the motor driver and motor wiring on the ramps board. Do you have any suggestions for how to get the motors running, or what is the problem? Thank you in advance.

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  • Former Member
    0 Former Member over 9 years ago

    Check this, may be helpfull:

     

    http://reprap.org/wiki/Stepper_wiring

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  • Former Member
    0 Former Member over 9 years ago

    plug jumpers under a4988 drivers 12 of them 3 under each

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  • clem57
    0 clem57 over 9 years ago

    Has this worked before?

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  • Nate1616
    0 Nate1616 over 9 years ago

    What do you have your endstops set to in the firmware.  Check the endstops to see if they are reading triggered. type M119  they should read open.

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  • Former Member
    0 Former Member over 9 years ago in reply to Former Member

    I read the stepper wiring reprapwiki article, and I do not think that was the problem because the four wire steppers that came with my kit were already set up with the correct ends, so it can't be the wiring. It had never worked before. I had not put in the jumper caps until recently (i did not know what they were for, or even what they were called, until just recently). Unfortunately, right after I set up the jumper caps under each motor driver (I am confident i put them in the right way), i fried the 5v regulator in the Arduino mega 2560 after connecting the 12V power supply, and i think it also ruined the RAMPS board. I think this because I purchased a new Arduino, downloaded the firmware, and after connecting it to the RAMPS board, it wont turn on. I think this is because i tried calibrating the voltage of each motor driver (via the trimpot) before putting on the jumper caps. Could that have been the reason that the 5v regulator burned? Thank you again for your help.

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