Worm Drive Motor 12V 180 RPM 20Nm horrid vibration

Hi - anyone, please help. I'm on version 2 of my 2-dof sim. I bought a pair of Worm Drive Motor 12V/24V 200W, 180 RPM, 20Nm Torque (https://www.motiondynamics.com.au/worm-drive-motor-12v-24v-200w-180-rpm-20nm-torque.html)

I was really excited about mounting these into my setup - as I previously had little Toyota wiper motors. The wiper motors worked well - but overheated often

I've spent the last three days making brackets and actuator arms for the new beefy motors. It also required beefing up my power supply - ended up using two HP 400W server supplies in parallel - pushing out 64Amps.

Bracket:

Power supply in parallel:
Thought I'd post this as others might be interested.
The load share wire is front - second from bottom. Pin 19 - 12LS

My problem:
I chose motiondynamic motors as they seemed popular on the forums. After a lot of teething issues with the power supplies etc. I eventually got it all powered up and running. I was really excited about the prospect of having more power and response. However, these motors will not settle under load (same configuration as the wiper motors - which worked well, they also "wobbled" a bit, but not as bad). I'm using the "From AtoZ : 2DOF arduino wiper playseat" configuration -Arduino and moto monster controllers etc. 12V DC setup.

In idle they shake violently and even under load it's terrible. I have no idea what I did wrong. I found a bit of slack in the actuator arm - remedied that - but still no luck. The 10K single turn pot is directly mounted and is getting good feedback from the rotation.

Best way to illustrate my problem is this video.


Can anyone please help or advise?

Hi - I've moved to SMC3. The motors are holding much better now - however I can't get them to move with output testing?

They seem to do what they should - as I've done a little test by moving them off centre without power and on power up - they reset themselves to the centre position.

Attached is my configuration - I've spent hours reading through the forums - I'm sure everything is right. Also replaced my UNO and Motomonster just to be sure - no luck. Pulling my hair out - this is getting very frustrating now. Please see the attached images and let me know if I have any configs wrong. Thanks.

Yes - thank you. I figured that after rebooting Really appreciate your help and willingness to respond. You were right - the SMC3 is so much smoother and more refined and responsive.

Hi @noorbeast - hopefully this is my last question/problem. It's working more or less as it should and I'm thrilled. I have one minor issue remaining. My one motor (Axis 2a) is sluggish in the one direction only.

I really don't know if this is a mechanical or software issue. While I was making the brackets (hacksawing in the vice) the action caused one of my DC motor/geaboxes to fall off the bench onto a carpeted floor. They are very solid and it didn't make much of a noise on the fall - so I'm hoping it's still good.

I'd like to rule out a software/configuration issue before I go to the lengths of opening up the motor to inspect it. But it's strange that it would work well in one direction on not the other - if the motor was physically damaged - I would assume it would be problematic in both directions.

Not only is it slow in the one direction - it barely has any holding strength in the direction. Yet the other direction holds well and the movement is snappy.

I've included a video to explain this - You'll have to look at the far motor - the actuator arm is just peeking out - but it illustrates the movement issue. I would really appreciate your thoughts on this.

Hi - that's a brilliant idea. It will definitely determine if it's a motor or hardware issue. Will give it a go in the morning. Thanks again for your advice.

Keep in mind however that its normal for a motor to run more efficiently in one direction than the other. Its also normal for worm gears to lock more strongly in one direction than the other. But with two of the same motors one should not operate much differently than the other.

Ok - swapped the axis controls and power to the other motor. It's definitely something wrong with the config or electronics as the behaviour is the same on the other motor. Works perfectly in one direction - but sluggish and little power in the opposite direction. It seems to get progressively worse with each rotation too. That's really weird and has me totally confused. Surely if it was the H-bridge - it would exhibit this behaviour in both directions? I will try swapping it out - just to be sure. But @noorbeast - if you have any other suggestions, I'm all ears. I've attached a video of the behaviour and a screenshot from the SMC3 utility. It's a relief that I've ruled out a motor problem, but frustrating that my sim is still out of action.

Ok - problem solved. Faulty Monster motor bridge (H-bridge). And that was a brand new one . Anyhow swapped it out and all is working as it should. It was really strange that it only worked well in one direction (the faulty one.)