Made an adjustable motor dynamometer
Added 2018-03-24 14:36:27 +0000 UTCfor repeatable load testing in the next CNC episode. To give the BLDC servo a chance I needed it to be switchable while running.
It's super simple too: The rotary switch shunts the two stepper motor phases with equal resistances between 4 and 0 ohm, the on/off switch just disconnects everything.
Comments
Might need a bigger one, not because it can't take it but because it skips steps at higher forces
Marco Reps
2018-03-25 11:58:20 +0000 UTCYes, I think that would actually make it a dynamometer, like this without measurement it is just an adjustable load
Marco Reps
2018-03-25 11:56:35 +0000 UTCCould you measure the voltage to track the performance as well perhaps?
Joseph Tavora
2018-03-25 11:47:24 +0000 UTCAssuming the poor stepper can cope, this would make a great torture test rig for cordless drills.
Joseph Tavora
2018-03-25 11:46:31 +0000 UTCUrban dictionary ruining innocent words since 1999
Marco Reps
2018-03-25 00:07:51 +0000 UTCIsn't that called docking? ;)
John McCormick
2018-03-25 00:00:27 +0000 UTCI knew that that was possible somewhere in the back of my head, but I've never actually tried it. Until now ðĪ Very satisfying
Marco Reps
2018-03-24 17:44:29 +0000 UTCNice and simple
Kean
2018-03-24 15:07:47 +0000 UTCHaha. I had 2 stepper motors mounted to a fronpanel and connected together. So whenever you turn one the other one would also turn. I gave that every visitor to play with and EVERYONE was looking for the belt at first. So funny !
Holger P Kleinert
2018-03-24 14:42:23 +0000 UTC
![Noah Productions [NP]](https://xaiju.com/istorage/42432.jpg)
