Creality CR-30 Tips and Tricks

cr30.txt

ESSENTIALS FROM THE CR-30 DISCORD:
1. Loosen the small belt connecting the conveyor to its stepper to avoid overheating.
2. Remove the conveyor and loosen all the screws on the heat bed plate except the front center by one quarter turn.
3. Tape the +5V pin on the USB cable to eliminate potential circuilating currents that may damage the Octoprint Pi.
4. Install the "Community Firmware":  https://github.com/CR30-Users/Marlin-CR30
5. PID Tune the hot end and bed.
6. Tune E-steps.
7. Level the bed following Nak3D's YouTube video.  
8. Tune bed level side-to-side using ???'s repeating leveling pattern.
9. Level the bed front-to-back using a leveling wedge.  
10. Tune Z-steps by printing 100mm blocks.  

MY OWN FIXES:

Conveyor Cupping:  
Silly me, I thought it would be a good idea to give the conveyor a good scrub since I had it off the machine.  
Getting it wet was apparently a bad idea.  After reinstalling the conveyor, I found that my conveyor was cupping on the 
sides, leaving only the center 100cm or so touching the heat-bed, and making printing anything outside of that impossible.  
This was solved by:
1. Ensure that the conveyor tensioner blocks are level.  
2. Raise the bed plates by 2cm.  This requires re-leveling from scratch including raising the Y axis hard-stop plates.  
3. Tension the conveyor to be snug but not overly tight.
4. Run the conveyor slowly for 3 full rotations with a bed temperature of 70C while placing and replacing textbooks on the
conveyor in order to "iron" it flat.  The books will retain heat so temperatures higher than 70C may be a bad idea.  
5. Place small, flat weights on the cupping parts of the belt while printing.  I used 2 steel "321" blocks I happened to have.