Springy wiper for improved nylon & PETG printing

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TD-Linux
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Joined: Thu Jul 02, 2015 6:05 pm

Springy wiper for improved nylon & PETG printing

Post by TD-Linux » Mon Sep 03, 2018 3:58 pm

I had a lot of trouble with bed leveling due to bad wiping, especially with oozier filaments. Part of the problem is that the felt wiper pads don't push very hard against the nozzle, especially after a few uses when a trench gets dug into the felt.

To solve this, I made an improved wiper that uses a 3d-printed spring to hold the pad at a more constant tension. It holds the same felt wipers, just inserted sideways. It should also work with scotchbrite pads. Also I've only tested this on a Mini v1, but I think it should work on other printers too.

https://www.thingiverse.com/thing:3082324

I'd be interested in feedback on how it works. In particular, there are a couple of ways it could still be improved:
  • More spring travel - this would require the felt pad to be taped down, as otherwise it will fall off when the spring is fully extended.
  • Preload - Gives effectively more travel (and therefore more constant force) while still keeping height low. Would make installation slightly harder.
  • One piece - not sure how to design this but I think it could be done.

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kyle vick
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Re: Springy wiper for improved nylon & PETG printing

Post by kyle vick » Mon Sep 03, 2018 6:23 pm

Brilliant... Great Idea! Downloaded it.. when i get a chance I will tray it on the TAZ6

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piercet
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Re: Springy wiper for improved nylon & PETG printing

Post by piercet » Thu Sep 06, 2018 7:45 pm

Nice! I really like the concept of reducing strain on the print head there.

sealfab
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Re: Springy wiper for improved nylon & PETG printing

Post by sealfab » Tue Sep 18, 2018 5:21 am

very cool, did you have to modify your gcode at all?

TD-Linux
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Re: Springy wiper for improved nylon & PETG printing

Post by TD-Linux » Thu Sep 20, 2018 12:45 am

No, this is set so that the original wipe height puts it at the right compression. I picked the spring force by finding the minimum needed to home successfully after wiping, then doubling that.

BusterCherry
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Re: Springy wiper for improved nylon & PETG printing

Post by BusterCherry » Mon Feb 04, 2019 2:41 pm

kyle vick wrote:
Mon Sep 03, 2018 6:23 pm
Brilliant... Great Idea! Downloaded it.. when i get a chance I will tray it on the TAZ6
Did you end up trying this mod for the TAZ 6? Did it require any Gcode modification?

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