Motors keeps vibrating but not moving

[SannyGT]

Thank you for helping

I managed to stop the vibration by increasing the motor current to 3000ma.
(P = U * I |12 * 3 = 36W of power.)
I use the 'Deltarunner glide system' to support the rods of the delta printer https://www.thingiverse.com/thing:2206030
The pros of this system is that it holds well againts the construction.
The cons of it is that it creates friction, so my stepper motor needs to work harder. I think that that was one of the problems why my stepper motor kept vibrating.

Most of the problems are finally solved!

Thanks!

[dc42]

@sannygt said in Motors keeps vibrating but not moving:

I managed to stop the vibration by increasing the motor current to 3000ma.

That doesn't sound right at all, if your motors are only rated at 1.3A, because at 3A they will get extremely hot and burn out quickly - unless you are inadvertently running them at reduced power (M913 command). I suggest you run M906 and M913 without parameters, to check what the motor current really is.

[SannyGT]

I totally agree that it is not an smart idea to double the amps in a motor that is only rated for 1.3A. Safety is priority number one here.
(My mom won't be happy at all when she hears the smoke detector in my room.)

M906: Motor current (mA) - X:3000, Y:3000, Z:3000, E:2000:2000:2000:2000:2000:2000:2000:2000:2000, idle factor 30%

M913: Motor current % of normal - X:100, Y:100, Z:100, E : 100 : 100 : 100 : 100 : 100 : 100 : 100 : 100 : 100

I am also afraid that my motor are mabye to small

• 42x42x34mm
• Rotor Intertia: 34g.cm2
• Holding torque: 28N cm
• Detent Torque: 1.6N cm

[sigxcpu]

@sannygt said in Motors keeps vibrating but not moving:

The firmware that i use is Marlin

Are you sure?

[SannyGT]

The json file says that it runs marlin

[dc42]

@sannygt said in Motors keeps vibrating but not moving:

I am also afraid that my motor are mabye to small

42x42x34mm
Rotor Intertia: 34g.cm2
Holding torque: 28N cm
Detent Torque: 1.6N cm

Those motors are OK for a small printer. I have similar motors on my Cartesian printer with 200x200mm bed, rated at 1.33A. I run Y and E at 1000mA , X and Z at 800mA.

[dc42]

@sannygt said in Motors keeps vibrating but not moving:

The json file says that it runs marlin

I expect it says that the USB input channel is configured for Marlin compatibility, which is normal.

[Phaedrux]

@sannygt I hope you aren't using printed motor mounts, because they may melt at those high currents.

I think it's likely you are getting some binding which is requiring so much torque to overcome. I suggest you recheck your mechanical setup and see if you can get things moving more smoothly.

[SannyGT]

Here are some images of my machine, maybe it can help.

I was thinking about adding ceramic Grease (fat) on the rods to reduce the friction. Should that work?

I have seen that industrial machines like lathes, CNC machines, and robot arms use it a lot. That gave me the idea to use it.

[dc42]

How hot are the motors getting? if you really are running them at 3A and they are rated for only 1.3A then they will get extremely hot quite quickly. If they don't, then the motor specification must be wrong. You could measure the resistance of a winding using a multimeter and compare it to the value on the data sheet.

[SannyGT]

Hello,

Sorry for the inactivity.

I managed to get the motors moving on rod Y and Z, only the motor on rod X is still vibrating. I reduced the amps to 1.3A now in the firmware.

I do need to borrow a multimeter sinds i only have a industrial voltage meter

But the good news is that the problems so far has been reduced

[T3P3Tony]

@sannygt try temporarily swapping the motor plugs between a working axis and X to see if the problem moves axis or stays with the existing one. What did you do to solve the issue on the other two axis?

[SannyGT]

I increased the motor current to 1800ma so it receive a bit more power

But the X motor barely moves at 3000ma. and there is barely torque on the X motor when it moves. I think that i am just gonna buy a new stepper motor to replace X motor with a bit more power.

[T3P3Tony]

@sannygt did you try the test i suggested?

[SannyGT]

Yes unfortunately there was no result,

The X motor kept vibrating so i guess the motor itself.

[T3P3Tony]

@sannygt yes sounds like that motor is faulty

[SannyGT]

Hi @T3P3Tony

I installed some brand new motors to the machines and it is working perfect now. So the problem was the motor itself.

Thanks for the suggestions everyone!