Hello,
So i am retrofitting a statasys FDM 2000.
I have it running stock but it is limited by the software and due to the complexity of the setup i am unable to use any of the existing drivers.
So inside the machine there are 3 PK268-01A stepper motors.
The machine has them wired as bipolar already so that saves me a bit of headache and has them paired off for each coil.
My problem is the motors 2 following variables.
Inductance: 56mh
resistance: 17.2Ohms
according to the gecko drive site to find the max voltage is 32 * √mh = VMAX
So my motor would max voltage is 239 but i know the original system drove it around 40V.
I tried using my DRV8825 drivers but no matter what i do the motor just vibrates back and forth.
What i have tried so far
Adjusting the motor current from low to high
try all combinations of microstepping to none at all
Adjusting the pulse width in the FW 0-5
Driving the chip with 30V 5A psu
Slowing down the steps per mm
Switching the order of the pairs of wires
Motor with load and without.
I know the driver works because when i hook up a much smaller nema 17 motor everything works.
When i move this motor to one of my larger TB6560 based drivers on 24V it works.
My current thought is to use a trinamic based driver
TMC262-BOB40
But i dont want to sink money into dead ends so to speak.
I would like to try to avoid switching out my motors in this machine if possible.
Any thoughts on why the DRV8825 failed to turn the motor and if the trinamic driver would work.
So i am retrofitting a statasys FDM 2000.
I have it running stock but it is limited by the software and due to the complexity of the setup i am unable to use any of the existing drivers.
So inside the machine there are 3 PK268-01A stepper motors.
The machine has them wired as bipolar already so that saves me a bit of headache and has them paired off for each coil.
My problem is the motors 2 following variables.
Inductance: 56mh
resistance: 17.2Ohms
according to the gecko drive site to find the max voltage is 32 * √mh = VMAX
So my motor would max voltage is 239 but i know the original system drove it around 40V.
I tried using my DRV8825 drivers but no matter what i do the motor just vibrates back and forth.
What i have tried so far
Adjusting the motor current from low to high
try all combinations of microstepping to none at all
Adjusting the pulse width in the FW 0-5
Driving the chip with 30V 5A psu
Slowing down the steps per mm
Switching the order of the pairs of wires
Motor with load and without.
I know the driver works because when i hook up a much smaller nema 17 motor everything works.
When i move this motor to one of my larger TB6560 based drivers on 24V it works.
My current thought is to use a trinamic based driver
TMC262-BOB40
But i dont want to sink money into dead ends so to speak.
I would like to try to avoid switching out my motors in this machine if possible.
Any thoughts on why the DRV8825 failed to turn the motor and if the trinamic driver would work.