marcoreps
patreon
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
Marco Reps
Might need a bigger one, not because it can't take it but because it skips steps at higher forces
Marco Reps
Yes, I think that would actually make it a dynamometer, like this without measurement it is just an adjustable load
Joseph Tavora
Could you measure the voltage to track the performance as well perhaps?
Joseph Tavora
Assuming the poor stepper can cope, this would make a great torture test rig for cordless drills.
Marco Reps
Urban dictionary ruining innocent words since 1999
John McCormick
Isn't that called docking? ;)
Marco Reps
I knew that that was possible somewhere in the back of my head, but I've never actually tried it. Until now 🤗 Very satisfying
Kean
Nice and simple
Holger P Kleinert
Haha. 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 !
