Cool DRV: Difference between revisions

Latest revision as of 04:44, 26 October 2013

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-CoolDRV is a [[RAMPS]]-compatible open source stepper motor driver.
+#REDIRECT [[Stepper Motor Driver]]
-Kliment @Reprap IRC said, "I still think if you are only using 2.5A steppers on RAMPS then you should rather go with a drv8825-based design. That would be a drop-in for RAMPS. The ones I designed are available at https://github.com/kliment/cooldrv, GPLv3 licensed, and can be purchased at
-http://www.reprapdiscount.com/electronics/36-drv-8825-designed-by-kliment-pololu-compatible-driver.html
-They can definitely manage a 2.5A stepper with microstepping. Since their BOM cost is in the single-digit dollars, I definitely recommend you try them first. Their current control is at 0.25V/A, so you want to set them to 2.5A*sqrt(2)/2*0.25V/A = 0.44V. Remember, for a 2.5A stepper with microstepping, you only need sqrt(2)/2 of its max current in each coil, so 1.77A for a 2.5A stepper. The ones from Pololu are closed source and have slightly worse thermal design, but they should be able to keep up with your steppers too."