I have a 6 wire motor that with 1.6ohm between 1-3 and 4-6. pins 2 and 5 do not seem to be connected to any other. Connecting to the easydriver does not even energize the motor based on 1-3 and 4-6. what is this?
Here are the motor specs: 2S42Q-L02442S (nothing on google, only 2S42Q results for other motors). 2.4V, 1.6ohm, 1.8step. Nema 17.
Thank you
It might be a 6 wire UNIPOLAR stepper motor.
see attached.
The CTs are meant to be connected to the motor power supply and the driver sinks the current for the other two leads at each end of each winding. There are two power connections (the CTs) and 4 motor winding connections that are switched to gnd by a driver.
HI Raschemmel,
Thank you! should not I be able to run these as a bipolar? (it does not run). Also, should not there be half resistance to the CTs from each of their leads? CTs do not seem to be connected to any leads or to each other. Maybe, I misunderstood how Unipolars work?
If the winding resistance from the "CT" to each of the two windings is not half the reisistance from winding to winding then it can't be a unipolar motor and I don't know what it is. Post a wiring list that shows 6 wires numbered any way you want to number them (because it doesn't matter) and the resistance from each to the other so we can see which wires are connected to which other wires.
mvoltin:
I have a 6 wire motor that with 1.6ohm between 1-3 and 4-6. pins 2 and 5 do not seem to be connected to any other. Connecting to the easydriver does not even energize the motor based on 1-3 and 4-6. what is this?Here are the motor specs: 2S42Q-L02442S (nothing on google, only 2S42Q results for other motors). 2.4V, 1.6ohm, 1.8step. Nema 17.
Thank you
Its probably a bipolar, happens to be wired up to a 6-wire cable with centre taps omitted.
If you get 1.6 ohms on two windings try putting about 1A through each one with
a bench supply and check that it locks the rotor with a convincing pull-out torque.
Any other problems you are having could be to do with the EasyDriver setup you
used for testing.
Hi raschemmel,
I have a 6 wire motor that with 1.6ohm between 1-3 and 4-6. pins 2 and 5 do not seem to be connected to any other. I am connecting based on 1-3 and 4-6.
Hi mark,
thank you, another bipolar works when substituting, so, the Easydriver should not be an issue. The max current on Easydriver is going in is 0.5 amps measured and not sure how it actually outputs to each winding (have not measured yet but specs say 750 each winding max). So, the current is definitely nowhere near 1 amp but still thought there should be some kind of torque resistance even with this low current. I will substitute the Easydriver with more capable controller in a week or two and see if it makes a difference.
The unknown is the rated voltage and current of the motor. Since we don't know that it seems you only option is to run it as a bipolar motor at a low voltage and monitor the current and temperature of the motor. If the rated voltage was 5V, the current would be 5/1.6= 3.1A The low winding resistance seems to suggest that it is a low voltage stepper and not designed to run at voltages like 12V.
Definitely don't run it from a voltage source with those winding resistances,
chopper drive only. Its probably about 1 to 1.5A rated if NEMA17 size, due
to thermal considerations.
So try again with the Easy Driver at ~1.5A setting. 0.5A is a puny amount for this
motor.
But did you try my 1A rotor-locking teest?