Hello,
I am experience some strange behaviour managing NEMA 17 motors with the AstroEQ. What worked a few days ago, now is stuttering/chatter as it the motor is not capable of managing the load. If I assist, the motor will work. The motors are both NEMA 17 with these specs. The chatter is sufficient to loosen set screws and hex screws.
Electrical Specification:
* Manufacturer Part Number: 17HS19-1684S1
* Motor Type: Bipolar Stepper
* Step Angle: 1.8°
* Holding Torque: 45Ncm(64oz.in)
* Rated Current/phase: 1.68A
* Phase Resistance: 1.65ohms
* Recommended Voltage: 12-24V
* Inductance : 2.8mH+/-20%(1KHz)
I have increased Vref to 1.2 from .9. Using EQMOD at 3, the motor does not stutter. At 4, the DEC motor cannot get out of the gate. The RA does not show any problem. This acts like the load is too great. When 5 days ago, the whole assembly was working fine. With any motor, V and I are important. If 12V and 2 amps is insufficient, I am seeking better motors within the limits of the AstroEQ. I have spare motor. I will see if this is just a bad motor. But, the loads are different between the RA and DEC. That is obvious. Time to do some mathematics.
Please review my setup.