Ya never know till you try. I guess we found the limits in that configuration. I'm reworking it, but it would be so much easier with bigger motors! I'd already be racing it! Dave
@SingleRacer And that's why there is a wonderful community out there to help you with any questions you may have. I mean I am no electrical/mechanical guru at all (I struggle quite a bit), but I have been following D Max's videos and done some research of my own and slowly but surely starting to grasp the concept. You've got this man, if you want to do it, then give it a try, you can only learn from the experience.
That was such an amazing thing to see. I have to say that this would also be useful for people playing games like Elite Dangerous and space exploration games! 😀 Glad to see you back creating content! Stay awesome 😀
burnt 2 BTS7960 cuz my seat crash into my motor and i can't stop it in time. Then i brought another 4, just to discover 1 of my rotatory hall sensors acting strangely, which caused all the problems. then i switch my hall sensors with those cheapo 270 degrees POT, and my seat was just going to work, my last BTS7960 is burnt again. How lucky i can get those 2-3 bucks each with 1 week shipping. Still so frustrated feeling the project is so close to working.
Yeah, sounds like the motor wires might need to be swapped around. I had that happen too, but I did not have the tie rod on it when initially testing so it just spun around. I sawpped motor leads and then the motor and hall effect pot were in unison as they should be. Keep testing my friend! Once you get it right, you will be way happier than spending a couple grand to buy a mover. DMAX
Thanks for the comment my friend! The small stuff I'm welding is actually fun! Wish I had some formal type training but I'm getting the hang of it.. Dave
I guess loosing a 100 pounds with Thanksgiving right around the corner is out of the question. Save some time just get better Motors. Great vid Dave. Wishing you well.
You too! The main thing to this series is getting the info out there! My 3DOF is awesome, this is just for the people who are trying to do it on a super slim budget.. (super slim and Thanksgiving don't really go together) haha! Dave
Did you try with PWM cranked up to 255? 255 is like 100% of the torque of the motors you are using. Bigger motors might need less PWM ... But I also think the motors are too weak for regular use. Remember, I have about the same angles you use here in my rig ... and even with 160W each they have to work hard as I have to move 106kg mass in total. My PWM with them is set to 140. 255 throws even me out of the rig 😁 but it is also a pain for the psu then.
No I did not. I suspected this configuration would require bigger motors. But I went for it anyway with those little motors- they can move the seat around without me in it. And just a little bit with me IN it.. It was kind of a test to see just how much they can move. I copied down those settings and will give them a go in the next video.. Thanks my friend! Dave
For those wondering: I built and tried the exact same kind of design (thanks to you d max, you legend) with my regular 12V windshield wippers (some « valeo » ones, pretry cheap) and It works perfectly well for me! They move and lift my weight with no trouble!but I only weight a 150pounds so maybe that’s why. 🤷♂️
I think its probably very important to get the centre of gravity perfect with that UJoint when your in the seat, that way the motors wont have to lift your weight, but you probably also checked that, the motors probably are just not strong enough, love your vids by the way :>
What wattage are those motors? I’ve bought a pair of 24v 30watt exalto marine wiper assembly with tie rides etc. I’m worried it’s not going to be big enough
Thanks for the quesiton. They did not come with any data sheet.. but I was able to stall them out using an ATV brake around 23 amps. Since the power supplies are rated at 550 watts at 25 amps.. I think they are around the same. I would say to 'test' your motors.. Since your making a 'seat mover' they may **MAY** have enough power.. but I dont know for sure.. 30 watts is not too much.. Give it a shot.. see what happens.. I went from saturn WW motors (unknown spec) too.. and they did not have enough power to convincingly move the seat.. to the Jazzy wheelchair motors.. and the Jazzy WC motors moved it just fine.. Dave
Dear D Max, I think the problem is that you modified the motors the wrong way. I also building my motion sim, and if I use the low and high speed to drive the motor, the power consumption increased drasticly but the output torque was dropped significantly. I modified it that the ground commutator is disconnected from the chassis and soldered a wire to it instead. When I use the high speed wire with the new groundlead, the current dropped, but the motor had much more torque to it.
Thanks for actually watching.. Yeah your right.. But fortunately, the motors I used are actually very weak in the first place.. I would recommend starting with better motors. I'm Glad you saw the issue and I see it too.. Thanks for the comment! DMAX
I know this is super late but you came to the wrong conclusion. It might be the motor need upgrade, and you did get bigger motors, but might not have been needed. You didn’t tune the PID parameters. The yellow is supposed to be super close to the green. It stalled because the pid wasn’t tuned to give a huge amount of amperage when you needed the torque. I get you’re it an electrical engineer and I am, but I don’t want you giving the wrong advice out of no fault of your own, coz you can’t know what you don’t know. There are great pid educational videos with how the parameters affect what’s going on. Search for some and you’ll have a much better solution.
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Absolutely loving the series and I've learned a lot. Thanks for part 5 D Max!
That's an awesome comment my friend! DMAX
I'm so glad my seat mover is plug and play! ':D
Well done my friend!
Oh, huge congrats to 1500 subscriber as well! :D
Yep, So easy you can do it "BLINDFOLDED" HAH! Thanks for the comment my friend! DMAX
@@RVRCloset Thanks! I did not see that one coming! Glad people are 'tuning' in.. D
Awesome video! Definitely learned a lot. The extension idea sounds like it has promise. Can’t wait to watch it in action 👍
Thanks for the comment Rob! Those little motors try so hard! All the best! DMAX
thanks for sharing. pretty dope you are teaching yourself to do all this. respect.
Thanks for the comment Mark! Hope it helps someone out! DMAX
Love the soundtrack you put in your videos
Thanks my friend! I appreciate the comment! DMAX
very cool. can't wait to see the finished product! 👍
Well that just sucks, looking forward to next episode Brother!
Ya never know till you try. I guess we found the limits in that configuration. I'm reworking it, but it would be so much easier with bigger motors! I'd already be racing it! Dave
Thanks for these videos D Max! You're a motivation for me to start building my own! 😁
Cool comment my friend! Yeah it's awesome. Just need a few of the right parts. I have a few more videos on all this stuff on the main channel DMAX
I'm just not smart enough to do something like this, D Max - but it's still fascinating to see how someone else tries to put all this together...
@SingleRacer And that's why there is a wonderful community out there to help you with any questions you may have. I mean I am no electrical/mechanical guru at all (I struggle quite a bit), but I have been following D Max's videos and done some research of my own and slowly but surely starting to grasp the concept. You've got this man, if you want to do it, then give it a try, you can only learn from the experience.
That was such an amazing thing to see. I have to say that this would also be useful for people playing games like Elite Dangerous and space exploration games! 😀 Glad to see you back creating content! Stay awesome 😀
Totally agree! Elite would be great on the sim in VR!
burnt 2 BTS7960 cuz my seat crash into my motor and i can't stop it in time.
Then i brought another 4, just to discover 1 of my rotatory hall sensors acting strangely, which caused all the problems.
then i switch my hall sensors with those cheapo 270 degrees POT, and my seat was just going to work, my last BTS7960 is burnt again.
How lucky i can get those 2-3 bucks each with 1 week shipping.
Still so frustrated feeling the project is so close to working.
Build with Sabertooths - not cheap but they do not burn.
@@ARTFLY yeah i kinda regret now, however i did brought a 24V power supply and 2 300W 1:40 24V motor... those cost a lot of my hobby money already.
@@ARTFLY Yeah I agree.. The Rolls Royce of motor controllers.. Plus the Motion Dynamics 60:1's would be my next step up..
Yeah, sounds like the motor wires might need to be swapped around. I had that happen too, but I did not have the tie rod on it when initially testing so it just spun around. I sawpped motor leads and then the motor and hall effect pot were in unison as they should be. Keep testing my friend! Once you get it right, you will be way happier than spending a couple grand to buy a mover. DMAX
Great work as always, D Max!! Thanks for sharing your process even when things don’t work out 👍 I know you’ll get it going soon!
Thank you B! I will keep pluggin away. I guess I am just stubborn! D
I love this series, your as cool as they come man 😎
Amazing stuff Dave I would love to learn how to weld properly. Keep up these amazing posts
Thanks for the comment my friend! The small stuff I'm welding is actually fun! Wish I had some formal type training but I'm getting the hang of it.. Dave
I guess loosing a 100 pounds with Thanksgiving right around the corner is out of the question. Save some time just get better Motors. Great vid Dave. Wishing you well.
You too! The main thing to this series is getting the info out there! My 3DOF is awesome, this is just for the people who are trying to do it on a super slim budget.. (super slim and Thanksgiving don't really go together) haha! Dave
Yiu always teach me somthing new master D Max🙏
Your too kind my friend! Great comment! DMAX
Did you try with PWM cranked up to 255? 255 is like 100% of the torque of the motors you are using. Bigger motors might need less PWM ...
But I also think the motors are too weak for regular use. Remember, I have about the same angles you use here in my rig ... and even with 160W each they have to work hard as I have to move 106kg mass in total. My PWM with them is set to 140. 255 throws even me out of the rig 😁 but it is also a pain for the psu then.
No I did not. I suspected this configuration would require bigger motors. But I went for it anyway with those little motors- they can move the seat around without me in it. And just a little bit with me IN it.. It was kind of a test to see just how much they can move. I copied down those settings and will give them a go in the next video.. Thanks my friend! Dave
For those wondering: I built and tried the exact same kind of design (thanks to you d max, you legend) with my regular 12V windshield wippers (some « valeo » ones, pretry cheap) and It works perfectly well for me!
They move and lift my weight with no trouble!but I only weight a 150pounds so maybe that’s why. 🤷♂️
Fantastic! Great to hear.. for whatever reason, those old WW motors just could not make it 'real' for me.. I appreciate the comment my friend! Dave
I think its probably very important to get the centre of gravity perfect with that UJoint when your in the seat, that way the motors wont have to lift your weight, but you probably also checked that, the motors probably are just not strong enough, love your vids by the way :>
What wattage are those motors? I’ve bought a pair of 24v 30watt exalto marine wiper assembly with tie rides etc. I’m worried it’s not going to be big enough
Thanks for the quesiton. They did not come with any data sheet.. but I was able to stall them out using an ATV brake around 23 amps. Since the power supplies are rated at 550 watts at 25 amps.. I think they are around the same. I would say to 'test' your motors.. Since your making a 'seat mover' they may **MAY** have enough power.. but I dont know for sure.. 30 watts is not too much.. Give it a shot.. see what happens.. I went from saturn WW motors (unknown spec) too.. and they did not have enough power to convincingly move the seat.. to the Jazzy wheelchair motors.. and the Jazzy WC motors moved it just fine.. Dave
if i want to make the rig spin 360 do i still need to add potentiometer on the traction loss motor?
Dear D Max, I think the problem is that you modified the motors the wrong way. I also building my motion sim, and if I use the low and high speed to drive the motor, the power consumption increased drasticly but the output torque was dropped significantly. I modified it that the ground commutator is disconnected from the chassis and soldered a wire to it instead. When I use the high speed wire with the new groundlead, the current dropped, but the motor had much more torque to it.
Thanks for actually watching.. Yeah your right.. But fortunately, the motors I used are actually very weak in the first place.. I would recommend starting with better motors. I'm Glad you saw the issue and I see it too.. Thanks for the comment! DMAX
@@DMAX_DIY Thank you for the content I really appreciate it.
I know this is super late but you came to the wrong conclusion. It might be the motor need upgrade, and you did get bigger motors, but might not have been needed.
You didn’t tune the PID parameters. The yellow is supposed to be super close to the green.
It stalled because the pid wasn’t tuned to give a huge amount of amperage when you needed the torque.
I get you’re it an electrical engineer and I am, but I don’t want you giving the wrong advice out of no fault of your own, coz you can’t know what you don’t know.
There are great pid educational videos with how the parameters affect what’s going on. Search for some and you’ll have a much better solution.