*A lovejoy is a sloppy/backlash prone connection type.* It is specifically designed to allow a little slop/misalignment in drive systems. Perhaps if you had one that was tapered and compressed together, you could be rid of that excessive backlash at the cost of inducing a thrust load on both the motor and cycloid drive. *Hopefully, you have the cycloid at enough of a gear ratio to make it very back-driving resistant* to help reduce the negative effects of the slop of a love joy. *It would have been better to turn the whole mechanism on it's face, and float the motor in with a more direct coupler.* The spindle motors for our mills are loosely mounted up, then spun to self center. You tighten the motor bolts while it's spinning, so the jolt of stopping doesn't throw it back out of alignment. That is a good place where a lovejoy coupler is used: it allows a little slop, but the spindles don't need to hold accurate position. The +/- 1.5deg they vaguely hold is plenty for a tool change, but way too soft and loose for an A-axis that needs to hold position to resist chatter and cutting forces. A lot of the industrial machines where I work have a coupler system with 2 plates and bolts between. The plates are cross planar to the shaft. In normal operation, they act very rigid and direct. But in the event of a bad crash, the plates are thin enough to bend/buckle. I don't know the name for that type of coupler.
From a local company that repairs kuka robots. This one was leaking oil and the standard procedure is replacement. I bought it with the equivalent of 270$ or so! 🤩
@@LikeFactoryMade thanks for sharing this i have to copy you, the idea is too good :-). i managed to get Spinea TS-200-169-E for a very good price new old stock this model i found had a 24mm keyed input shaft not splines so i may be able to bolt the motor direct. Only negative is it has quite a high reduction ratio at 169:1 but that gives lots of torque, what reduction ratio is the one you have? if i can use a fast servo maybe 2000-3000rpm it will be fast enough hopefully. I think it should be fine for this speed as the manufacturer data says 4500 rpm input speed max but with possible lost motion of up to 1arc min. but 4500rpm reduced is 26 rotations per min so full rotation in about 160deg per second max speed which is a bit fast maybe unless in a rapid? now my problem is to find a piece of steel large enough for the housing, maybe i will model in fusion 3d print then make a casting. i was also thinking about making the design so it can accommodate a 5th axis bolted to the TS200 but the 5th would have to be more compact in depth and have a built in servo so much more expensive choice. for now i am still rebuilding my machine, i need to edit some more videos i recorded and share them but i have been too focused on the rebuild ;-)
@@weldchip Not sure about the ratio that mine has, didn't had time yet to do the proper tunning of the clearpath servo and the linuxcnc configuration. I will found out then. I was told its something like 90:1 but don't know exactly. Yours is much bigger, you could use it to build a 5th axis trunion :D
@@LikeFactoryMade the ts 140 can be 33:1, 57:1, 87:1, 115:1, 139:1, so maybe it is 87:1 for you. The indication of the reduction ratio is in the model number so it would be something like ts140E-87.
arata prea preeeaa blanaa :))))))) sunt totusi curios cati 150.000 de euro a costat tot din atelierul asta... deocamdata am doar o freza 3020T , un ender 3 si o bormasina de 70 de lei :)))))) pana la 30 sper sa am si eu atelier ca asta ca sa fac brate Kuka si catei Spot
Cam la 30 de ani am inceput sa adun scule, abia atunci mi-am luat strungul. A urmat TIG si apoi freza, si dintr-o ocazie masina de rectificat care sa fost relativ ieftina. Imparti 150k la 5, si cam acolo e. Fara garaj. Dar in 6 ani, se aduna. Important e ca ai inceput. Desi la inceput erau tentante, eu am evitat routerele pentru ca stiam ca vreau sa pot freza otel.
good video but I didn't like being subjected to your taste in music for two minutes at the beginning. (and you wouldn't like mine either, I am sure). good video otherwuse.
instantly subscribed! only non-3D-printed cycloidal drive I've seen on youtube, and it's massive! thank you
*A lovejoy is a sloppy/backlash prone connection type.* It is specifically designed to allow a little slop/misalignment in drive systems. Perhaps if you had one that was tapered and compressed together, you could be rid of that excessive backlash at the cost of inducing a thrust load on both the motor and cycloid drive.
*Hopefully, you have the cycloid at enough of a gear ratio to make it very back-driving resistant* to help reduce the negative effects of the slop of a love joy.
*It would have been better to turn the whole mechanism on it's face, and float the motor in with a more direct coupler.* The spindle motors for our mills are loosely mounted up, then spun to self center. You tighten the motor bolts while it's spinning, so the jolt of stopping doesn't throw it back out of alignment.
That is a good place where a lovejoy coupler is used: it allows a little slop, but the spindles don't need to hold accurate position. The +/- 1.5deg they vaguely hold is plenty for a tool change, but way too soft and loose for an A-axis that needs to hold position to resist chatter and cutting forces.
A lot of the industrial machines where I work have a coupler system with 2 plates and bolts between. The plates are cross planar to the shaft. In normal operation, they act very rigid and direct. But in the event of a bad crash, the plates are thin enough to bend/buckle. I don't know the name for that type of coupler.
Foarte frumos Vasi!!! sa mai postezi!!!
Bine făcut, felicitări!
Very impressive!!!
How fix ? For get an part plz
You need to do the coolant Cannon project! It would work with a mist nozzle too!
Thanks for sharing. Any measurements of the backlash?
See my other video: th-cam.com/video/t45isp6Ha2M/w-d-xo.html
beautyfull work , thank for sharing it .
Need to know where did you get the drive?
From a local company that repairs kuka robots. This one was leaking oil and the standard procedure is replacement. I bought it with the equivalent of 270$ or so! 🤩
Nice work where did you get the drive from? I'm looking at building a similar project.
From a local kuka repair company
@@LikeFactoryMade thanks for sharing this i have to copy you, the idea is too good :-). i managed to get Spinea TS-200-169-E for a very good price new old stock this model i found had a 24mm keyed input shaft not splines so i may be able to bolt the motor direct. Only negative is it has quite a high reduction ratio at 169:1 but that gives lots of torque, what reduction ratio is the one you have? if i can use a fast servo maybe 2000-3000rpm it will be fast enough hopefully. I think it should be fine for this speed as the manufacturer data says 4500 rpm input speed max but with possible lost motion of up to 1arc min. but 4500rpm reduced is 26 rotations per min so full rotation in about 160deg per second max speed which is a bit fast maybe unless in a rapid? now my problem is to find a piece of steel large enough for the housing, maybe i will model in fusion 3d print then make a casting. i was also thinking about making the design so it can accommodate a 5th axis bolted to the TS200 but the 5th would have to be more compact in depth and have a built in servo so much more expensive choice. for now i am still rebuilding my machine, i need to edit some more videos i recorded and share them but i have been too focused on the rebuild ;-)
@@weldchip Not sure about the ratio that mine has, didn't had time yet to do the proper tunning of the clearpath servo and the linuxcnc configuration. I will found out then. I was told its something like 90:1 but don't know exactly. Yours is much bigger, you could use it to build a 5th axis trunion :D
@@LikeFactoryMade the ts 140 can be 33:1, 57:1, 87:1, 115:1, 139:1, so maybe it is 87:1 for you. The indication of the reduction ratio is in the model number so it would be something like ts140E-87.
@@LikeFactoryMade the manufacturer has quite a good datasheet www.spinea.com/en/products/twinspin/t-series
Do something about audio. Noise is too loud while sensible audio is too low.
arata prea preeeaa blanaa :))))))) sunt totusi curios cati 150.000 de euro a costat tot din atelierul asta... deocamdata am doar o freza 3020T , un ender 3 si o bormasina de 70 de lei :)))))) pana la 30 sper sa am si eu atelier ca asta ca sa fac brate Kuka si catei Spot
Cam la 30 de ani am inceput sa adun scule, abia atunci mi-am luat strungul. A urmat TIG si apoi freza, si dintr-o ocazie masina de rectificat care sa fost relativ ieftina. Imparti 150k la 5, si cam acolo e. Fara garaj. Dar in 6 ani, se aduna. Important e ca ai inceput. Desi la inceput erau tentante, eu am evitat routerele pentru ca stiam ca vreau sa pot freza otel.
good video but I didn't like being subjected to your taste in music for two minutes at the beginning. (and you wouldn't like mine either, I am sure). good video otherwuse.
I guess you really want some serious torque multiplication
I love it. I'm building a 2 legged robot on my channel. Check it out and let me know what you think, thanks.