Results 11 to 20 of 20
Thread: Y Belt Rubbing Solutions
-
06-04-2014, 02:29 PM #11
-
06-04-2014, 03:17 PM #12
- Join Date
- Apr 2014
- Posts
- 50
gmay3, adding a GT2 adapter (like you linked to) shouldn't affect the accuracy, so long as you re-tension the drive belt.
But I'm wondering, isn't there a real, machined GT2 bushing/pulley/bearing that exists? If it's one with guard walls, it may be easier to alleviate the problem at hand.
As to the core design problem with the Y-idler belt rubbing, I think the mounting brackets on the bottom of the Y-bed are what's out of alignment (shifted to the LEFT of the i3v), as I've had to move the GT2 driver further to the end of the shaft on the stepper motor to compensate. This makes the problem on the Y-idler even more pronounced, as now both the bed and stepper are 2-3 mm further to the left.
-
06-05-2014, 05:00 PM #13
I wonder if adding some thin O-rings to the edges of the bearings would be enough to keep the belt in check.
-
06-13-2014, 07:39 PM #14
Ok so here is my solution.
Looking from the top, my belt was rubbing on the left side of the bearing bracket.
Step 1: Loosen the right bolt about 3 full turns.
Step 2: Insert as much of a Medium Fender Guitar pick behind the now loose wooden part.
Step 3: Tighten the bolt.
photo 2 (1).jpgphoto 1 (1).jpg
My belt is running smooth now!
-
06-16-2014, 06:03 PM #15
- Join Date
- Apr 2014
- Posts
- 50
And? How's it working now, gmay3?
-
06-17-2014, 07:06 AM #16
1stage, I haven't ran the printer since the fix, BUT to confirm the belt was staying in the same place I disabled the steppers and moved the heat bed back and forth fully several times. So, I'm relatively sure it is all fixed now.
-
07-15-2014, 08:25 PM #17
Thought I'd add this i3v Y-idler belt guide I ran into on Thingiverse - http://www.thingiverse.com/thing:359773
-
07-16-2014, 07:56 AM #18
Very cool, I have added that to my things to make on thingiverse. That's exactly what I was looking for. Thanks printbus!
-
07-29-2014, 09:11 PM #19
I recently printed a pair of the Y-idler belt guides and installed them today. In addition to putting one on the Y-idler, I also put one on the X-idler. I think these are perfect for the job. I used a total of three M5 washers, one as a spacer between the two bearings and then one outside each bearing. The washers on the outside of the bearings provide just enough clearance for the pulley sidewalls. On the X-idler, I swapped out the MakerFarm wood "washer" for the same three washer approach and an M5 Nyloc nut.
Two cautionary notes - you'd want to make sure the teeth of the pulley print clean to minimize "noise" in your prints, and you may have to extend the length of the belts some to accommodate the increase in diameter of the pulleys.
These are definitely something every i3v should have, if nothing else just to improve the design quality of the machine.Last edited by printbus; 07-30-2014 at 08:07 AM.
-
07-29-2014, 09:40 PM #20
Adjusting the screws on the Y idler to adjust the angle works fine, but leaving one screw slightly loose isn't very satisfying. If you're using Slic3r and have it set to print loops around the part, you can peel up these thin bits of plastic and use them to shim one side of the Y idler. I just put one sliver in behind the right-hand piece of wood and snugged down the screw. You can tighten the screw to crush the plastic to get it to the angle you need without leaving the screw loose.
For bonus points, you can fix the belt rubbing on the wood part at the front of the X idler as well by using longer screws and an extra nut where the belt anchors to the X carriage. The stock bolts just aren't long enough to get the belt deep enough between the extrusions to not rub on the wood. You'll need to adjust the position of the X motor pulley slightly, too. If you can sight down across the front surfaces of the X extrusion from above and you can see the belt, it's too far forward.
All of that said, the rubbing doesn't really cause any problem, as far as I can tell.
Printer will print perfect...
06-14-2024, 10:44 AM in Tips, Tricks and Tech Help