theinfamousbob
Member
It's finally coming together. I finished the mechanical part of the xy plane (just need to mount the table) and I tested my x-axis with a breadboarded L297, 4 Microchip TC4420s (rated @ 6A, if my memory serves me correctly), and a 555 pulse gen. It works great, amazing stepping resolution even in full step. However, the TC4420s like to get quite hot if I step the motor at a higher speed. I'm not sure if I've done something wrong or just need to heatsink the TC4420s. I have the outs of the L297 directly into the TC4420s (each is a half bridge) and then a pair going to one coil.
I'm not really as good with mosfets, would I need a resistor between the source and gate?
(I don't have time to draw up a schematic right now, but I'll post one soon. After I breadboard the entire controller I'm going to have it cut a PCB for the controller, then I'll switch it over and solder it all.)
I'm not really as good with mosfets, would I need a resistor between the source and gate?
(I don't have time to draw up a schematic right now, but I'll post one soon. After I breadboard the entire controller I'm going to have it cut a PCB for the controller, then I'll switch it over and solder it all.)