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extruder motor to hot?
Hevilp
Posts: 136🌟 Super Member 🌟
Hi,
my extruder motor did not have enough power and I followed the hints here to check the voltage.
I set the voltage to 0,8V (from ~0,55) with the potentiometer.
I started a print and it worked all fine, but after 1-2 hours the print stopped. I started another print and it was the same.
I still have problems with the extruder motor, it is going very hot, after the change of the voltage from 0,55 to 0,8.
Today I meassured again, and there comes 0,125-0,13V .
I tested the multimeter with a batterie and the values are exact.
I meassured like 100 times and turned the potentiometer and the voltage never changed really.
Something broke maybe? I can pri the 20mm testcube without problems very well, but if a print goes longer, something seems to go bad. I have no idea
my extruder motor did not have enough power and I followed the hints here to check the voltage.
I set the voltage to 0,8V (from ~0,55) with the potentiometer.
I started a print and it worked all fine, but after 1-2 hours the print stopped. I started another print and it was the same.
I still have problems with the extruder motor, it is going very hot, after the change of the voltage from 0,55 to 0,8.
Today I meassured again, and there comes 0,125-0,13V .
I tested the multimeter with a batterie and the values are exact.
I meassured like 100 times and turned the potentiometer and the voltage never changed really.
Something broke maybe? I can pri the 20mm testcube without problems very well, but if a print goes longer, something seems to go bad. I have no idea
Comments
The voltage is always around 0,130 even on the z axis, I dont understand the World...
Why Y is overtemperature? omg....
small prints are very good, but prints over 30 min, fails. An extrusion does not happend, because the extrusion motor does not push the filament.
The motor is very very hot and almost not touchable.
I will change the A4988 to TMC2130 as soon as they arrive, but there must be something wrong with motor.
I changed the stepper driver to others but it still shows 0,13 Volt, what could be the error
All values were messured on Z and Extruder and are the same always...
1,6 A on, while 0,16-0,18V
For Sure : the extruder Motor is going to Hot, the filament is too soft and not beeing pulled anymore.
It only happens to larger prints like over 45 min. I set the current to 0.7 volt.
IMPORTANT I put the printer on a new table instead on the floor. The table gets little eruptions because of the print moves and the potentio screw get turned. The voltage changed for 0.03 V because of that... Everything can happens in 3d printing
X = 0.85V
Y = 1.25V
Z = 0.85V (I set to 1.7V because of two motors we have)
E = 1.00V
It was great! I had never heared working of my printer so quiet. Except one thing. Had an issue with extruder. It was very hot, and I started getting some clicks... So, I moved back my old A4988 for extruder and added rubber between extruder and printer case. And now my extruder has normal temp.
Someone says tcm2xxx can't do high torque as a4988 can.
P.S. Be sure you are measuring right pin. I can't find any documentation for REV points for my tmc2208 pcb revision. So I just tracked VREF signal from the chip.
Can it be that the TMC2130 are not made for the extruder motor use? My motor is also getting very hot but why.. I set it to 1.00V
What about turning of the stealthchop on the extruder motor? Would that help?
Best regards,
Chris
Maybe that helps, otherwise I think it only works without the TMC2130 on the extruder motor.
Okaaay M913 E 1 did the Job, now its set to 1 but after 30min printing, I think it does only help a little, i will keep printing and see how hot the motor will get now.
UPDATE: After 1,2h printing, filament jam because of an to hot extruder motor... DONT INSTALL A TMC2130 for the extruder motor! Its not passible to run the motor with it!
Y Motor is also getting very hot....
I went back to the standard stepper driver, they are different to the A4988, they are not ajustable any more as it seems.
To my surprise, the motor is getting to hot too! I changed the PTFE Tube (I had a 1,9mm) and set the temperature of the nozzle higher (I now have a rotary fan) I think the fan is cooling the nozzle that the PETG is cooling down to and comes out to cold. After all that changes, the motor is a bit cooler and the printer works now with the PETG filament.
I try to isolate the nozzle block with that silicon isolator what came some minutes ago.
However, it seems that the extruder motor even with everything in standard is on the edge with high temperature. I think with PLA it isnt such a big problem.
The stepper motor now has about 75-80°C with the TMC2130 its 90°C. With 80°C you can see deformations on the filament allready. And jep, the 1,9mm PTFE tube gives so much resistance with the deformed filament that the motor gets hotter and hotter.
Now I think of to install a Y and extruder motor cooling. Maybe with peltier cooler? I have to inform me about that, I just got notice that it exist
@Samuel Pinches
the current I can decrease with gcode right? What do you think? How low can I go? I read about the same problem in different other printer forum. They all had hot extruder motors with the TCM 2130.
How about to set the TMC 2130 to that values:
Axis = Vref X = 0.85V - Y = 1V because its totaly hot to
- Z = 1.7V because 2 motors?
- E = 0.85V maybe to low?
Wish you all marry christmas and happy happy printingOn some other printers, there is a fan on the front of the extruder, to prevent the filament softening in the extruder. Peltier would work, but it is very energy inefficient. A heatsink on the back of the motor with a fan would be much more efficient.
One thing is not clear, isnt it right that the 1.1.8 firmware sets all currentses to 800? (peak *1.41)
Doesnt have the settings in the firmware beeing the same as set pysicaly on the TMCs? Otherwise the firmware limits the currentses.
Or would it mean I set the X to 0,85V on the TMC and the firmware which is set to the 800 would limit it only at 1121 peak current.
actually, the TMC tutorial on the wiki was written by another contributor, not me. You’re welcome to edit and correct it yourself, it’s open for everyone to add to
Update, changed back to the full TMC2130 setup, wanted to see if its passible to get a solution with reduced currencies.
Printing now the calicat on the valves x 800 y500 z900 e450 with hybrid threshold speed change on z30 and e20
The only difference is that e makes now slightly a tweeting sound but not on every print. have a good feeling that it works now. After 30min the extruder motor is warm but not very much, thats great and no sign of underpowering SPI is awesome!
Pay attention:
If a Motor reaches 100C to 125C on the inside (it will always be colder on the outside) the neodyne magnets inside will weaken, it now needs more current for the same torque permanently... leading to a even hotter motor until it stops working or the driver goes up in flames.
And:
Putting rubber between Motor and Frame is a bad idea, the metal frame is the absolute best heat sink the motor can have, if you insulate the connection your motor will get even hotter, leading to above problems.
The 450mA are working realy good, the motor is warm so you can leave the hand on it.
It was a chain reaction of deformed filament in the 1,9mm PTFE tube, a colder nozzle because of the new radial fan and a to high 800mA. The motor used to much force and got hotter and hotter and the filament got softer and softer till it got pressed away.
I will add some heatsinks on the back, a big 30mm high one and on the sides 10mm high once. Same with the Y motor. If a fan is need, I dont know. I think on the Y motor its realy no bad idea.
Thanks for the information