Reprap Prusa i3 Rework - X END IDLER - With belt tensioner
by ramkam, published
Use This Project
Give a Shout Out
If you print this Thing and display it in public proudly give attribution by printing and displaying this tag.Print Thing Tag
Mod of the X END IDLER. Added a tensioner for the X carriage belt.
- installed it, it works.
- Some suggested that using the other design with 3 bolts is needed for deformations and stress distribution on the z bearings. I didnt see that issue when i assemble it. Also i ran an FEM analysis, and i get the same outcome : it doesn't seem to be a concern.
- Ran another FEM on the ball bearing holder ("roller puller"), it should be ok as long as you stay below 10Kg of tension force. Less than 2Kg force should be more than enough to get the belt tensioned, so, it's on the safe side and has provision for fatigue. Just print it with the same orientation than on the pictures of the assembled part, and slice it with 1.4mm wall thicknesses.
-- Assembly :
Print the X END IDLER and the Roller_Puller
Insert a screw in the roller puller, head of the screw goes in the socket (you may need to cleanup the hex socket a little, and to bend very gently the arms while pushing the screw head to its slot).
Insert the screw & roller puller into the X_END_IDLER bore, add a nut, et voila you have your belt tensionner
The point in having this part is to be able to dose carefully how much tension you want to put. Dont tension the belt too much or you may endup putting too much stress on the tubes that contain your z axis roller bearings.
You may want to add a washer before the nut to even out stresses, and to use a nylock nut so that vibration during prints doesnt make it turn and go away.
I use a full metal extruder, so i printed with ABS at 240°C to get strong bonding (dont go that high if you have a JHEAD you'd destroy the peek)
Slicing done with Cura, with infill 30%, wall thicknesses 1.4mm top bottom 1mm. Seems to be rigid enough like that.
Printing done with the i3 at 30mm/s external sides, 50mm/s inner sides and 70mm/s infill, and extrusion rate at 110% to get some more chances of layers bonding.
Upgrade this Thing with Thingiverse AppsCustomization
Edit, personalize, or revise this ThingTools and Utilities
Repair, slice, or enhance this Thing
Reprap Prusa i3 Rework - X END IDLER - With belt tensioner by ramkam is licensed under the Creative Commons - Attribution - Share Alike license.
What does this mean?
- You must attribute (give credit) to the creator of this Thing.
- You must distribute Remixes under the same license as the original.
- Remixing or Changing this Thing is allowed.
- Commercial use is allowed.
Show Some Love
Say thanks by giving ramkam a tip and help them continue to share amazing Things with the Thingiverse community.Tip Designer
We're sure ramkam would love to see what you've printed. Please document your print and share a Make with the community.
To post a Make simply visit this Thing again and click I Made One to start uploading your photo. It’s even easier to post a Make via the Thingiverse Mobile app (available via Google Play and Apple App Store).