I have 2 stepper motors Nema 17 (model and data sheet : https://s3-ap-southeast-1.amazonaws.com/...20RevA.pdf).
Do you know a good cheap driver for this motor?
I tried with pololu A4988 driver, but I don't like it. It doesn't have enough Output Current and I broke it.
Thanks
Looking at the datasheet
Looking at the datasheet that you provided, your motor is rated at 1.68A per phase. The Pololu A4988 driver can deliver up to 2A per phase with proper heat dissipation. Anything above 1A requires additional heat removal. I have used the A4988 drivers to drive similar nema 17 motors with very good results. You could use the DRV8825, it can deliver up to 1.5A per phase without a heat sink.
Whatever you decide to use, make certain that you properly setup the current limiting and use heat dissipation if your application requires it. This will save you time and money in the long run.
Good Luck!
use fans, a good power
use fans, a good power supply and heatsinks. NEMA 17 is only a standard form for motors, not an indication of the torque or power used.
From what I have read
some of those chips actually sink heat to the PCB. Adding a heatsink to the top is supposedly not as profitable as blowing cool air across the bottom of the board where the heat is directed. I know the drv8835 datasheet actually calls for through hole vias to an exposed area on the bottom to radiate heat.
