Thanks for that. You have no idea why all stepper motors have a warning on them that they shouldn't be disassembled. What you did. Did you use some non-magnetic insulation between the rotor and stator to pull the rotor out, because from what I've read, pulling the rotor out of the stepper motor will cause a loss of magnetism and then also a drop in stepper motor torque.
@@dorlock42 this motor was already out of use and may have been dead so no problems there. But it shouldn't cause any loss of magnetism itself, same as pulling a refrigerator magnet across the fridge. Obviously if damage resulted to the surface it's possible for a host of problems but the rotors are pretty hardy and I haven't experienced any problems in the past.
@@loganpoppe3494 Thank you for your prompt reply. I couldn't find much information about this anywhere right now. Somewhere someone wrote that they tried a dyno test and measured 112 in-oz of torque at low rpm. He removed the rotor for 5 seconds, then put it back in again did the dynamic test. The low speed torque was now 70 in-oz, only 62% of the pre-removal value. I don't know I have no way of checking this, but I would need to replace the bearings on a single stepper motor and this is what I'm quite worried about.
Great video. I have a problem with my stepper motor. It stalls at high speed. It feels rough in one place when turning by hand. I cam adjust it slightly by playing with the end screws and adjusting tension. Do you think it might be a slight bend in the shaft? Sounds like the same problem as yours?
It's hard to say for sure. Motors stall whenever the force back against them exceeds the torque they put out. It could be that your driver doesn't put out enough torque or that you're simply exceeding how fast it is capable of turning. Maybe an end bearing is bad or the whole thing is misaligned. The clearance between rotor and stator is just a few thousandths of an inch so it doesn't take much.
@@loganpoppe3494 Well I have sort of fixed it for now. Turned the casing around 90 degrees - and left one screw slack. Not ideal but it is much smoother now and doesn't stall.
I thought it was a great video. Thank you! Would love to see a full set up, with a drive and controller.
What are the number of turns in each coil?
Thanks for that. You have no idea why all stepper motors have a warning on them that they shouldn't be disassembled. What you did. Did you use some non-magnetic insulation between the rotor and stator to pull the rotor out, because from what I've read, pulling the rotor out of the stepper motor will cause a loss of magnetism and then also a drop in stepper motor torque.
@@dorlock42 this motor was already out of use and may have been dead so no problems there. But it shouldn't cause any loss of magnetism itself, same as pulling a refrigerator magnet across the fridge. Obviously if damage resulted to the surface it's possible for a host of problems but the rotors are pretty hardy and I haven't experienced any problems in the past.
@@loganpoppe3494 Thank you for your prompt reply. I couldn't find much information about this anywhere right now. Somewhere someone wrote that they tried a dyno test and measured 112 in-oz of torque at low rpm. He removed the rotor for 5 seconds, then put it back in again did the dynamic test. The low speed torque was now 70 in-oz, only 62% of the pre-removal value. I don't know I have no way of checking this, but I would need to replace the bearings on a single stepper motor and this is what I'm quite worried about.
Great video.
I have a problem with my stepper motor. It stalls at high speed. It feels rough in one place when turning by hand. I cam adjust it slightly by playing with the end screws and adjusting tension. Do you think it might be a slight bend in the shaft? Sounds like the same problem as yours?
It's hard to say for sure. Motors stall whenever the force back against them exceeds the torque they put out. It could be that your driver doesn't put out enough torque or that you're simply exceeding how fast it is capable of turning. Maybe an end bearing is bad or the whole thing is misaligned. The clearance between rotor and stator is just a few thousandths of an inch so it doesn't take much.
@@loganpoppe3494
Well I have sort of fixed it for now. Turned the casing around 90 degrees - and left one screw slack. Not ideal but it is much smoother now and doesn't stall.
Well done sir,great job
What about if it's not making fine letters