advice, which step motor driver? - Page 1
Forum section: electronics / general

author: legacy
author_rank: Super Contributor
timestamp: June 12, 2018, 05:52:39 pm
content: hey guys?betweenlv8729andtmc-2130, what do you suggest?(if the answer is "none" of the two, please address me to the right one)micro-stepping is in the requirement's list

author: nctnico
author_rank: Super Contributor
timestamp: June 12, 2018, 06:03:39 pm
content: Be careful: stepper motors aren't as ideal to use as you might think. A servo motor with an absolute encoder might be a better solution. You'll need the absolute encoder anyway to verify the position of the stepper motor.

author: ajb
author_rank: Super Contributor
timestamp: June 12, 2018, 07:15:06 pm
content: Quote from: nctnico on June 12, 2018, 06:03:39 pmYes, and how close to ideal a motor is can vary quite widely. I've just been doing some testing for a project and I've observed a shocking difference in performance between a random NEMA 17 stepper from Amazon and one of Trinamic's microstepping-optimized motors, particularly in position ripple with 256x microstepping.I'm using one of Trinamic's integrated controller+driver chips and like the TMC2130 it has a programmable step sequencer. That allows you to customize the shape of the current waveform through a full step, to help compensate for much of the non-ideal character of cheaper motors. It's a bit tricky to program because of the way the table is compressed, and I've found a couple of table settings that seem to cause it to lose its shit, but once you get it figured out it helps a LOT. There's an appnote and a spreadsheet you can get from Trinamic to help calculate the curve, and it's fairly easy to add a few fields to make it spit out the table register values so you can just copy and paste them into your initialization code.So, generally, if you're interested in fine microstepping and are willing to put some time into calibrating the driver against the motors, I'd definitely recommend the Trinamic part.But really, to get good advice you're going to have to tell us about your application.

author: legacy
author_rank: Super Contributor
timestamp: June 12, 2018, 07:16:22 pm
content: Quote from: IonizedGears on June 12, 2018, 06:06:47 pmyes, 3d printer

author: legacy
author_rank: Super Contributor
timestamp: June 12, 2018, 07:19:01 pm
content: Quote from: ajb on June 12, 2018, 07:15:06 pmGoing to design a 3d printer with the smoothest moves possible.

author: nctnico
author_rank: Super Contributor
timestamp: June 12, 2018, 08:33:07 pm
content: Quote from: legacy on June 12, 2018, 07:19:01 pmDefinitely go for servo motors.

author: tpowell1830
author_rank: Frequent Contributor
timestamp: June 12, 2018, 10:02:22 pm
content: Take a look at Marco REp's video and he starts talking about a special stepper motor circuit/device around 7:20.Hope this helps...

author: legacy
author_rank: Super Contributor
timestamp: June 13, 2018, 08:02:25 am
content: Quote from: nctnico on June 12, 2018, 08:33:07 pmWhich one do you suggest to look at?

author: legacy
author_rank: Super Contributor
timestamp: June 13, 2018, 08:03:16 am
content: Quote from: tpowell1830 on June 12, 2018, 10:02:22 pmWow, awesome! Thanks!