Y-belt gone?
Posted by rich1812
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Y-belt gone? December 27, 2017 11:24AM |
Registered: 9 years ago Posts: 133 |
Hello, I have a reprap purse i3 3d printer. Recently I went print a small block, it was supposed to be a square, but every few layer, the printer makes a clicking noise, the finished print is nothing square, along the Y-axle, it keeps shifting every few layers. I think the Y-axle belt is gonna. I need to replace the belt.
When I order the belt, Is the gt2 6mm belt with 2mm pitch the correct one to purchase? and when I replace it, what is the typical length to form the y axle loop? Thanks.
Edited 2 time(s). Last edit at 12/27/2017 11:38AM by rich1812.
When I order the belt, Is the gt2 6mm belt with 2mm pitch the correct one to purchase? and when I replace it, what is the typical length to form the y axle loop? Thanks.
Edited 2 time(s). Last edit at 12/27/2017 11:38AM by rich1812.
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Re: Y-belt gone? December 27, 2017 07:50PM |
Registered: 6 years ago Posts: 1,863 |
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Re: Y-belt gone? December 27, 2017 07:58PM |
Registered: 7 years ago Posts: 507 |
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Re: Y-belt gone? December 28, 2017 07:47AM |
Registered: 8 years ago Posts: 601 |
Its hard to destroy a belt, If it is you'd know. You would be able to see the fibres inside and the rubber would be crumbling away. Your description seems to be pointing to idlers, motors, pulleys or tensioners. Check these points first just to be sure.
Other then that GT2 6mm belt is the most common. How much you need is dependant on the printer, but I'd recommend ordering more then you think as its so cheap
Other then that GT2 6mm belt is the most common. How much you need is dependant on the printer, but I'd recommend ordering more then you think as its so cheap
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Re: Y-belt gone? December 28, 2017 05:21PM |
Registered: 9 years ago Posts: 133 |
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Re: Y-belt gone? December 28, 2017 07:31PM |
Registered: 6 years ago Posts: 1,863 |
The belt should not be real tight. but tight enough that so if you push the bed back for forth quickly you don't hear the belt jumping teeth.
Some use an old cloth pin spring to tighten the belt. I tried but could not get the spring to stay on the belt. My belt is snug not tight. and has worked for over a year.
Some use an old cloth pin spring to tighten the belt. I tried but could not get the spring to stay on the belt. My belt is snug not tight. and has worked for over a year.
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Re: Y-belt gone? December 28, 2017 08:10PM |
Registered: 11 years ago Posts: 5,780 |
Do you know why we use glass or steel core belts? Because they don't stretch (much). Do you know what happens when you put one of those spring tensioners on a belt? You turn the belt into a spring that stretches. Don't use those things. If the belt isn't tight enough, adjust it at the clamp.
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
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Re: Y-belt gone? December 29, 2017 03:42AM |
Registered: 6 years ago Posts: 1,007 |
On the other hand, to replace the weak springs of the crappy cloth pins available today by these belt springs will give a firmer grip allowing your clothes to dry fast in the most furious wind !
To try to have the belt jump the motor pulley is not the right way. It is amusing to perform though
Yes, the belt must be tight, it is all described in the Gates and other mfg documents. The right tension is easy to get provided a proper adjustment mechanism exists.
"A comical prototype doesn't mean a dumb idea is possible" (Thunderf00t)
To try to have the belt jump the motor pulley is not the right way. It is amusing to perform though
Yes, the belt must be tight, it is all described in the Gates and other mfg documents. The right tension is easy to get provided a proper adjustment mechanism exists."A comical prototype doesn't mean a dumb idea is possible" (Thunderf00t)
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Re: Y-belt gone? December 29, 2017 04:33AM |
Registered: 9 years ago Posts: 288 |
Does your printer not have tensioners, sound like its loose.
if not, have you tried taking the belt off, pulling it tighter and refixing to the clamps?
Any 6mm GT2 belt will work as long as it is long enough.
As others have said, always buy longer then you need.
BTW a bicycle puncture repair kit has everything you need to fix belts of turn them into closed loop belts.
Edited 2 time(s). Last edit at 12/29/2017 04:35AM by GRAYWOLF.
if not, have you tried taking the belt off, pulling it tighter and refixing to the clamps?
Any 6mm GT2 belt will work as long as it is long enough.
As others have said, always buy longer then you need.
BTW a bicycle puncture repair kit has everything you need to fix belts of turn them into closed loop belts.
Edited 2 time(s). Last edit at 12/29/2017 04:35AM by GRAYWOLF.
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Re: Y-belt gone? December 29, 2017 04:42AM |
Registered: 8 years ago Posts: 601 |
So basically check everything along the belts path. Your pulleys and idlers should be straight and moving freely. If they are not straight you will see the belt move backwards and forwards slightly as it rides up and down the pulley.
Check the motor and pulley, you may find the grubb screw has come loose.
Check your belt tensioner, or the place where the belt secures to the carriage it may have slipped.
Check your motor wiring. Broken wires may cause intermittent connection.
Check the motor and pulley, you may find the grubb screw has come loose.
Check your belt tensioner, or the place where the belt secures to the carriage it may have slipped.
Check your motor wiring. Broken wires may cause intermittent connection.
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Re: Y-belt gone? December 29, 2017 07:42PM |
Registered: 7 years ago Posts: 507 |
The OP mentioned a clicking, this could also point to a stepper losing steps. Are the layer shifts big, like a couple of mm? Or just small ridges?
Since this is the y axis of an i3, I'm inclined to think you need to turn down jerk and acceleration. Just thinking about it now, a belt skipping teeth isn't exactly what I'd call a click, but a stepper skipping steps is.
Just another thing worth checking.
Since this is the y axis of an i3, I'm inclined to think you need to turn down jerk and acceleration. Just thinking about it now, a belt skipping teeth isn't exactly what I'd call a click, but a stepper skipping steps is.
Just another thing worth checking.
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Re: Y-belt gone? December 30, 2017 10:05AM |
Registered: 8 years ago Posts: 601 |
Quote
Trakyan
The OP mentioned a clicking, this could also point to a stepper losing steps. Are the layer shifts big, like a couple of mm? Or just small ridges?
Since this is the y axis of an i3, I'm inclined to think you need to turn down jerk and acceleration. Just thinking about it now, a belt skipping teeth isn't exactly what I'd call a click, but a stepper skipping steps is.
Just another thing worth checking.
I agree, in fact when my motor wires came slightly free it caused the extruder to lose torque and click
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Re: Y-belt gone? January 01, 2018 08:26AM |
Registered: 9 years ago Posts: 133 |
Happy new year! Thank you everyone foe the replay. I am wondering if the Y acceleration in the firmware can contribute to this factor? (I use Marlin.) Also I noticed the the wheel, end, not the motor end, keeps wriggling back and forth when the printing the in fill, could this be a factor as well?
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