Bonded Heat bed for 12"

[lakester]

Cool demo of the problem (thx!).

2 questions:

1. What does "PID" refer to? (Sorry..., been puzzling on that...)
2. What is the table structure of the Mendel90 in the vids? What are its similarities to the MakerFarm wood+glass table?

I tried the bearing/guide on the top of the Z rods and it made the problem much worse.

These two videos show the difference between ON/OFF heat bed vs PID.

ON/OFF

https://www.youtube.com/watch?v=0T5BE5XC2-8

PID

https://www.youtube.com/watch?v=RRSI2TJ3Trs

Those aren't my videos but some I came across. You have to figure with a 12" bed it would be even worse.