That motor weighs a couple of pounds too it is like a brick. I don't know if you could tell or not by just watching the video but it was screaming! Then it jumped up right before the video ended when it rotor locked. I turn it up until the motor stalls at high speed. In the first video I am using a 555 timer to generate clock pulses I feed directly into the step input of the driver. Here are a couple videos of my stepper motor driver going. But you're going to have to figure out what you need for your motor. 25 ohm resistors to get me 2 amps per phase current. You will likely pay through the nose getting the right parts for this, more than the IC itself cost! So pay special attention when selecting these for your drivers. Try to use non-inductive resistors for these as well. The formula for determining the proper value for your resistors can be found in the Toshiba datasheet for the TB6560AHQ driver IC on page 10 section 6.

You will note there is no value given for those on the schematic because what you use depends on what motor you plan on running off the driver.

There are two components I would like to make special mention of on my drivers, the current sense resistors, R5 and R6. Everything else on the board is a passive device, resistors, capacitors, DIP switches, you don't need the LEDs but I would have had to have tied off those unused gates if I didn't include them anyways so I threw them on there. If you want you can skip the diodes by the voltage regulator. I include reverse bias diodes because I have loads of diodes and they never hurt to have. My driver board also has its own on board voltage regulator a 7805. Just make sure your pinout matches it, or adjust your board layout accordingly.įinally I used a 74LS14 as a buffer to square up my signals because optoisolators can be a little sloppy in that department. I'm sure any dual optoisolator will do just fine in its place though. I used Toshiba TLP521-2 because I found them for cheap someplace and they had specs I liked. The next part of note is the optical isolators. You don't have to mess with surface mount, you can put a heatsink on it easily, they do everything you can possibly ask for with a hobby CNC stepper motor driver. Apparently since I got mine the price has dropped even lower to $4.20 a piece. I got mine at Mouser I think it was for $4.79 each. The main component of this circuit is the Toshiba TB6560AHQ Stepper Motor Driver IC.

Fritzing stepper motor