Hey guys...I just have a quick question on stepper motors...
I have a five hybrid (four control lines - http://datasheets.globalspec.com/ds/38/ChangzhouFullingMotor/1BED4F62-73FC-442C-B65E-1BD5DEF0DD3B) stepper motors being controlled by a pile of BS2's and propeller chips...When modeling the circuit on breadboards everything worked swimmingly. Now everything is on PCBs, and if I hook LED's up to the outputs of the H-bridge drivers all the sequences run fine. But when I hook the steppers up I just get vibrations. The system is controlled by PC and the rotation of each stepper can be controlled per-step on the C++ interface. So the amount of vibrations of the motor does correspond to the value sent from the PC.
I've tried connecting the control lines to the steppers in every possible configuration but seem to get similar results. I have a 15A atx supply powering the peripheral power to the H-bridges so there must be enough available current and it may be a long shot but I was wondering if anybody has any suggestions?
The only thing I've noticed is there only seems to be 0.3A on each of the H-bridge outputs, where the steppers are rated at 0.6A per channel. As only two of the four outputs are simultainiously energised throughout the sequence, does this mean the two energised outputs should equal 0.6A?
I know its a bit vauge, but any suggestions would be great...
Cheers
Lucas.
I have a five hybrid (four control lines - http://datasheets.globalspec.com/ds/38/ChangzhouFullingMotor/1BED4F62-73FC-442C-B65E-1BD5DEF0DD3B) stepper motors being controlled by a pile of BS2's and propeller chips...When modeling the circuit on breadboards everything worked swimmingly. Now everything is on PCBs, and if I hook LED's up to the outputs of the H-bridge drivers all the sequences run fine. But when I hook the steppers up I just get vibrations. The system is controlled by PC and the rotation of each stepper can be controlled per-step on the C++ interface. So the amount of vibrations of the motor does correspond to the value sent from the PC.
I've tried connecting the control lines to the steppers in every possible configuration but seem to get similar results. I have a 15A atx supply powering the peripheral power to the H-bridges so there must be enough available current and it may be a long shot but I was wondering if anybody has any suggestions?
The only thing I've noticed is there only seems to be 0.3A on each of the H-bridge outputs, where the steppers are rated at 0.6A per channel. As only two of the four outputs are simultainiously energised throughout the sequence, does this mean the two energised outputs should equal 0.6A?
I know its a bit vauge, but any suggestions would be great...
Cheers
Lucas.