Re: Replace timing belts with FireLine August 28, 2018 04:54PM |
Registered: 6 years ago Posts: 155 |
Re: Replace timing belts with FireLine August 28, 2018 05:01PM |
Registered: 6 years ago Posts: 155 |
Quote
the_digital_dentist
Belts normally load the motor shaft on one side. I don't know why, but people who play with cables seem obsessed with the motor shaft loading.
Re: Replace timing belts with FireLine August 28, 2018 05:21PM |
Registered: 6 years ago Posts: 155 |
Quote
the_digital_dentist
The holes are placed symmetrically around the motor shaft. If they weren't you would be forced to position the motor in a mount in a specific orientation. Who would want such a thing? I have made many motor mounts for NEMA standard motors, always using symmetric screw hole locations, always fitting perfectly.
Even if the distances between the pulleys and the shaft were different, it would have no effect on the cable tension.
Re: Replace timing belts with FireLine August 28, 2018 10:18PM |
Registered: 12 years ago Posts: 5,794 |
Re: Replace timing belts with FireLine August 29, 2018 01:07AM |
Registered: 9 years ago Posts: 5,232 |
Quote
JoergS5
Quote
the_digital_dentist
Belts normally load the motor shaft on one side. I don't know why, but people who play with cables seem obsessed with the motor shaft loading.
The reason for this is for me, that the stepper inside has ball bearings and a load on one side will disturb the function of the stepper. Like a direct stepper - shaft connection which destroys the stepper (the reason for loose coupling).
Re: Replace timing belts with FireLine August 29, 2018 01:41AM |
Registered: 6 years ago Posts: 155 |
Re: Replace timing belts with FireLine August 29, 2018 01:45AM |
Registered: 6 years ago Posts: 155 |
Quote
the_digital_dentist
31.0 mm +/- 0.1 mm.
Re: Replace timing belts with FireLine September 01, 2018 02:35AM |
Registered: 7 years ago Posts: 1,007 |
Re: Replace timing belts with FireLine September 13, 2018 07:20PM |
Registered: 7 years ago Posts: 4 |
Re: Replace timing belts with FireLine September 14, 2018 08:09AM |
Registered: 12 years ago Posts: 5,794 |
Re: Replace timing belts with FireLine September 14, 2018 01:06PM |
Registered: 7 years ago Posts: 4 |
I don't think it walks up and down. I'll confirm.Quote
The cable is just allowed to walk up and down the drive pulley?
The only sound I hear is from the part cooling fanQuote
Does it make plinky noises when it runs?
I haven't paid close attention, but I want to say the string doesn't walk up and down. I'll take a video the next time I run a print job.Quote
How do you keep the cable parallel to the guide rails when it walks up and down?
Per the manual, the drive system should be checked every 300 printing hours. The machine is approaching close to ~800hours without any maintenance to the drive system, and I haven't seen any slack on the string.Quote
How long does it run before you have to retighten the cables?
Not sure what type, but from their brochure, if I recall correctly, it's some kevlar line (will need to confirm).Quote
What kind of cable does it use?
Re: Replace timing belts with FireLine September 14, 2018 04:07PM |
Registered: 6 years ago Posts: 63 |
Re: Replace timing belts with FireLine September 15, 2018 01:41AM |
Registered: 7 years ago Posts: 1,007 |
Re: Replace timing belts with FireLine September 15, 2018 01:51AM |
Registered: 7 years ago Posts: 1,007 |
Quote
warbunniex
its a fusion 3 printer. could try asking them... though i think they may have patented it if i remember correctly. so could always go look up the patent.
Edit: also holy cow. i just saw that motor pulley... thats gotta be some kinda joke for a 6k machine!
Re: Replace timing belts with FireLine September 15, 2018 03:47AM |
Registered: 9 years ago Posts: 5,232 |
Re: Replace timing belts with FireLine October 01, 2018 10:57AM |
Registered: 6 years ago Posts: 63 |
Re: Replace timing belts with FireLine October 01, 2018 11:21AM |
Registered: 12 years ago Posts: 5,794 |
Re: Replace timing belts with FireLine October 01, 2018 08:34PM |
Registered: 8 years ago Posts: 507 |
Re: Replace timing belts with FireLine October 02, 2018 01:33AM |
Registered: 9 years ago Posts: 5,232 |
Quote
warbunniex
Just a thought.
So I decided to get some 100 pound fishing line for 10 dollars on amazon & used it as a hybrid system on my delta. It cut the belt length in slightly more than half and as allowed me to increase the acceleration & keep quality. And that got my thinking about hybrid systems.
Could be not keep the belt & run a fishing line over top of it? I'm gonna test it on the y axis of our local maker space's tevo tornado but I think it would at least help a little bit with the belt stretch.
Re: Replace timing belts with FireLine October 02, 2018 03:37AM |
Registered: 7 years ago Posts: 1,007 |
Obviously ! The location of the core fiber strands are precisely located in the "neutral plane". where there is no stretch when the belt goes around a pulley.Quote
o_lampe
...
I think, adding an extra layer around the belt would cut into the belt and destroy it eventually. It needs a higher tension then belt alone.
Re: Replace timing belts with FireLine October 02, 2018 09:50AM |
Registered: 6 years ago Posts: 63 |
Re: Replace timing belts with FireLine October 02, 2018 11:40AM |
Registered: 7 years ago Posts: 1,007 |
Quote
warbunniex
digital dentist - belt stretching has been a huge problem. specially for any prusa style machine with a 300mmx300mm bed. but also for machines like deltas with really long lengths of belt.
it actually bothers me that chinese companies still use 6mm belt for the y axis of prusa style machines cause it would be the biggest improvement to performance if they went with a 15 or 20mm belt & would honestly not cost much more.
mksa & o lamp - interesting I will have to record what it does to the belt over time! if the belt lasts even a year, id consider it worth it.
Re: Replace timing belts with FireLine October 02, 2018 04:15PM |
Registered: 12 years ago Posts: 5,794 |
Quote
Trakyan
Belt stretch can be a problem, especially under dynamic load. It gives us ringing.
For a given cross section, PE fishing line has a less stretch than kevlar or glass fibres. It has a higher young's modulus than those two. It also outperforms steel cables but I can't remember if it was by weight or cross sectional area. Regardless of how it outperforms steel in terms of strength it has a much lower minimum bend radius which is useful.
Re: Replace timing belts with FireLine October 02, 2018 09:07PM |
Registered: 8 years ago Posts: 507 |
Re: Replace timing belts with FireLine October 03, 2018 02:12AM |
Registered: 9 years ago Posts: 5,232 |
Re: Replace timing belts with FireLine October 03, 2018 10:18AM |
Registered: 6 years ago Posts: 63 |
Re: Replace timing belts with FireLine October 03, 2018 12:22PM |
Registered: 12 years ago Posts: 5,794 |
Re: Replace timing belts with FireLine October 03, 2018 02:38PM |
Registered: 6 years ago Posts: 63 |
Re: Replace timing belts with FireLine October 03, 2018 05:21PM |
Registered: 12 years ago Posts: 5,794 |
Re: Replace timing belts with FireLine October 04, 2018 02:31AM |
Registered: 7 years ago Posts: 1,007 |