I believe have figured it all out!
I have stepper motors on my 3DP12 that have not a laser etched labels with the date codes.
Known Data for "Date code only Steppers" 1.8º 200 steps 5.5ohms coil resistance.
Doing some mathematical calculations of known information about the unknown Stepper motor.
I have came up with an ideal of some of the Specs for the "Date code only Steppers".
1.8º 200 steps ~900ma 5.5ohms coil resistance puts us in the neighborhood of 48~54 mN/m torque.
With this information I believe that the steppers are being under driven with only .425 V-Ref.
By my calculations .9 * 8 *.1 = V-Ref .720 will test on The Controller that already has one burnt out a4982SLPT Driver chip.
******************* SOME TESTING TIME LATTER ********************
After completing the initial setup of a spare Controller to test my theories I connected the Stepper and tested with a V-Ref Voltage of .700v
Testing with 1mm steps first then changing to 10mm steps.
I cannot believe I have been running this 3D Printer with only about 1/2 the required V-Ref voltage needed.
And it only took 1 year for it to mess up and force me to start testing to see why it was acting up an going so wrong.
Originally I used the setting that were on the controller having this 2nd 3D Printer working so well.
Did not think that the controller adjustments was incorrectly done as It was purchased used from E-Bay and work so well on every print.
Until last week when it suddenly started to print with only the Y-Axis shifting the layers...
I have stepper motors on my 3DP12 that have not a laser etched labels with the date codes.
Known Data for "Date code only Steppers" 1.8º 200 steps 5.5ohms coil resistance.
Doing some mathematical calculations of known information about the unknown Stepper motor.
I have came up with an ideal of some of the Specs for the "Date code only Steppers".
1.8º 200 steps ~900ma 5.5ohms coil resistance puts us in the neighborhood of 48~54 mN/m torque.
With this information I believe that the steppers are being under driven with only .425 V-Ref.
By my calculations .9 * 8 *.1 = V-Ref .720 will test on The Controller that already has one burnt out a4982SLPT Driver chip.
******************* SOME TESTING TIME LATTER ********************
After completing the initial setup of a spare Controller to test my theories I connected the Stepper and tested with a V-Ref Voltage of .700v
Testing with 1mm steps first then changing to 10mm steps.
I cannot believe I have been running this 3D Printer with only about 1/2 the required V-Ref voltage needed.
And it only took 1 year for it to mess up and force me to start testing to see why it was acting up an going so wrong.
Originally I used the setting that were on the controller having this 2nd 3D Printer working so well.
Did not think that the controller adjustments was incorrectly done as It was purchased used from E-Bay and work so well on every print.
Until last week when it suddenly started to print with only the Y-Axis shifting the layers...