SainSmart ST330 V2 TB6560 Stepper Driver
This SainSmart stepper driver uses the TB6560 driver chip good to 3.5A and 34VDC. As with many SainSmart boards there is no schematic but there is a chinglish manual.
The first order of business was to create a schematic which, as expected, reveled an interesting feature which is not mentioned in the manual.
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| Schematic for ST330. Done with TinyCad |
The step signal sets the74HC123 retriggerable one shot. The one shot stays in its set mode as long as there are step pulses. One output of the one shot lights the run led and the other controls the motor run and idle torque. If the torque switches are left open then at run the torque is at 100% and at idle is 50%.
