When I auto home or try to align the z axis or start a print it fails and the z axis never moves. does anyone have any idea on what’s causing this and how can I read the printers log files using the usb? Do I have to install a program?
Hi,
Does your stepper motor work and drive the threaded rods?
How can I test if they work?
Very simple, does the threaded rods turn?
Wait for @Bjoern, he’s the SV04 expert here.
Hi there,
there is no need to wait for me - testing if the stepper motors can move & if the screw rods do follow the steppers is a good starting point.
If the screw rods are not following it should help to tighten the screws of the clutch couplings that fix the screw rods to the stepper motors.
Checking if the screw rods can be turned by hand easily is also a good idea. Both rods should be turned simultaneously when the printer is powered off. While turning the rods it will be noticeable if they are bent. A little bit of mechanical resistance will be caused by the stepper motors, but in case of higher resistance a close look for dirt and foreign objects on the treads & in the lead screws could help to identify a mechanical problem source.
In case of no mechanical problems the next step should be checking for electrical problem: From the “Settings” → “Move” menu the Z-Steppers can be powered. While the stepper motors are moving an electrical multimeter should indicate an alternating voltage between two pairs of pins on each 4-pin Z-axis stepper motor plug. If the motors are not moving, but still powered on there should be a DC voltage between at least two of the four motor plug pins. In case of missing voltage the wiring between motor plug and motherboard should be checked. In case the cable connection is intact measuring the voltage on the Z-motor connectors on the motherboard will be necessary. If there is no voltage between any motor pin during motor movement or motor hold at all, the problem is loacted on the motherboard & it could be either the TMC 2209 motor driver, the respective GPU pins or the onboard connections between.
Besides from the Z-axis issue: There are no log files out of the box. USB connection to a PC could be done by installing the freeware printrun/pronterface. In case of a missing USB-driver help can be found here.
Good luck!
Björn
Hi @Bjoern ,
Regardless of this thread, Ihave a question.
Have you ever had a stepper motor fail ?
Hi mich0111,
defining a “stepper motor fail” as a situation when the stepper motor does not turn as intended:
Yes, sure. However, this happened to me during CNC milling with wrong cut data when the motor torque got insufficient. During 3D-printing I never observed this kind of fail.
Also, I never ever had a stepper motor with a blown motor coil.
Usually the motor driver circuit will die much earlier than the motor coil…
/R
Björn
Hi,
Thanks for your reply
Hi,
I have gone through your list of steps and the stepper motor works fine and the z axis moves when the z up and down button is pressed in the z axis. I then installed the program that you suggested and when I pressed home I got this error.
Error:!! STOP called because of BLTouch error - restart with M999
Printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting)
Well done - you narrowed the problem down to the CR-Touch sensor.
Here are some hints about troubleshouting - I would hesitate to re-install the firmware.
Testing the CR-Touch sensor is described here - all instructions for the BL-touch will work with the CR-touch, too.
Good luck!
Björn
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I had a loose wire on a stepper yesterday. Happened after an update so i thought it was the update. I’ve also had steppers overheat and start to skip steps and cause layer shift. This was due to over accelerating the bed y axis.
Hi,
Is it a question?
Very surprising that a firmware update causes such damage.
Sorry, i was answering the failed stepper question. Firmware didnt cause proble. But the loose wire made me think the firmware was the issue as i had to reflash the board at same time.
Ive never had a stepper itself fail but ive had many stepper wires come loose and have had misconfigured steppers cause problems.
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Hi, the CR Touch sensor constantly flashes red. I took the print head off and disconnected the touch sensor and measured the voltage and I get:
White - GND
Black - Vcc
Yellow - 3v3
Red - GND
BLUE - 1V OR 3V
The cr touch sensor also moves freely when I move it manually. Is this an issue with the sensor/cable and sould I look at getting a replacement sensor and cable?
Flashing llight is just an information that something is wrong with your CR-touch.
Did you try the M280 P0 commands when the CR-touch was still wired?
M280 P0 S160 ; Release alarm
M280 P0 S10 ; pushes the pin down
M280 P0 S90 ; pulls the pin up
M280 P0 S120 ; Self test – keeps going until you do pin up/down or release alarm
Good luck!
Björn