Hi All. I have nearly finished my Delta printer build and received my Smoothieboard and lcd which look fantastic. Unfortunately, I had purchased the other hardware a month back, including the steppers since I had not yet decided on the smoothieboard. Problem is the company I purchased the Nema 17’s from only had 3.17v 2.5A steppers which are obviously rated more than the drivers can handle and they cannot be returned since I have milled flats in the shafts
The steppers will be driven with a 24vdc supply. Question is how much performance will I loose dropping the current in the firmware down to say 1.8A so as to not destoy the onboard drivers? I understand the early rostocks did this but then changed to lower amperage motors.
Question 2 is if the above solution will not work, I have 2 x Leadshine M325 drivers but would need to purchase another M525 driver since they M325 is no longer made. If all the stepper motors are identical will there be a problem running different drive models on the different axis’s.
Thanks for your help
Brad
Imported from wikidot
Hey.
The steppers will be driven with a 24vdc supply. Question is how much performance will I loose dropping the current in the firmware down to say 1.8A so as to not destoy the onboard drivers?
You’ll loose some, but it should end up pretty similar to having chosen the right steppers in the first place, so I wouldn’t worry about it.
Just try it 
Question 2 is if the above solution will not work, I have 2 x Leadshine M325 drivers but would need to purchase another M525 driver since they M325 is no longer made. If all the stepper motors are identical will there be a problem running different drive models on the different axis’s.
Nope that should be fine.
Cheers.
Thanks for the quick response Arthur.
I’ll limit the current below 2A for the alpha, beta and gamma stepper and see how it goes and use one of my external drivers so I can use the full 2.5A to the extruder motor.
Cheers
Brad
Got the smoothieboard wired up and have my new Delta build up and running, well air printing since the extruder has not been built yet, and everything runs perfectly. The board is fantastic and so easy to tune so thanks to the smoothie team.
I do have one queury though, can the stepper frequency be increased to dull down the hign pitched stepper whine that we all love to hate? I’m running the steppers at 1.5A max so I guess I could try and go lower. Makes the most noise when I set a print speed of 150mm/s in Cura but man does it fly, but the magnetic effector works flawlessly.
Hey.
Reducing current should reduce the sound, but may ( or may not ) result in skipped steps if you go too low.
Cheers.