How about you guys think. Do i get any proper benefit if i use A4988 vs DRV8825
This moment my Prusa i2 is little modifield and now thinging do i get any benefits if i use DRV8825 and trow that old A4988 drivers out.
Got a really heavy yaxis and with 32x micostepping you get it alot quieter. But did not notice any extra power. You get more torque of less microstepping anyways
drv8825 seem to overheat (and shut down) less for the same current and are quieter, the precission does not seem better than a4988 even with double amount of microsteps.
http://hackaday.com/2016/08/29/how-accurate-is-microstepping-really/ a nice summary
http://hackaday.com/2016/08/29/how-accurate-is-microstepping-really/
@Josef_Jelinek yes thats also true. But the DRVs seem to be optimised for more resitance. Ive got two y axis motors. Works ok but got two big ones so induction effects got so high i cant move very fast (200mm/s) anymore without loosing steps. If someone uses them then either with one big motor or two small ones
Grab the http://www.panucatt.com/product_p/sd5984.htm – A5984 – It offers 1/32nd microstepping like the 8825, is quieter than the 8825, works with low resistance motors, and doesn’t suffer from the mixed decay problems that the 8825 has.
8825s have ripple and hissing issues for many people, I don’t recommend them.
Ok thanks much to information. I think i still keep going old 4988’s.
The a4988 is a solid little performer, there’s nothing wrong with using it. Although newer drivers like the a5984 and THB6128 do work better.
Does anyone know any stepper driver (compatible RAMPS) what can handle 3A or more currents? I think to use 2pcs Nema17 (1.68A per motor = 3.3A~) with one stepper driver.
Any driver can with very little adaptation. Just break out the step/dir signals into any external controller you want, really.
If you’re on 24v or have low inductance motors, I would wire the motors in series on one driver.