What I learnt this week: 1.

3D Printing
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1

What I learnt this week:

  1. Thread lock / super glue grub screws for pulleys and extruder.
  2. Lubricate Z screws regularly.
  3. Calibrate E steps/mm properly.

What did you learn this week?

Edit: Don’t use super glue. See below.

2

Why are you super-gluing the grubscrews? That sounds like a pretty bad idea to me. I mean, what’s the point of a screw if you can’t unscrew it?

3

You can unscrew them, like thread lock it stops the screws working loose from vibration but if you supply any torque to the fastener it will come loose.

I have been having problems with my extruder, i thought it was the filament jamming and that the steps/mm were out. it turned out to be the grub screw working loose.

Note: I use thread lock as i have it anyway but others might only have super glue which is a suitable replacement, if used in moderation.

4

It’s very hard to use superglue in moderation, especially with the tiny m3 grubs. The 1.5mm hex head strips much faster than you’d imagine - even the tiniest drop of superglue will secure the thread beyond the head’s capabilities.
Use blue (light) thread lock.

On a related note, green (super strong) thread lock, which is still weaker than superglue, secures many cap head screws to a point where the head doesn’t strip, but the hex key twists and bends. How do I know? Please don’t ask…