Variable Print Speed
I know that you can set a different speed for the first layer, but I find that I get the best results if I manually "tune" my speed to 25% or so for the first several layers, and then go to 100%. I'm guessing this is not an option to do manually .. but could someone point me int he right direction to possible post-process the gcode to do this? I'm good with python and could write a utility if I understood more about the speed control (G-code vs. print settings). Thanks!
By the way, the problem I have with full speeds on the first few layers is that the serpentine patterns for support material tends to pull up at the corners .. not sure if that's a common problem?
Hope you all stay well! So good to see people put their printers to work for PPE / masks!
RE: Variable Print Speed
[...] By the way, the problem I have with full speeds on the first few layers is that the serpentine patterns for support material tends to pull up at the corners .. not sure if that's a common problem?
That is an adhesion problem. If your print surface is properly cleaned and your Live-Z calibrated properly, even large areas of 1st layer support should lay down cleanly:
Some people (myself included) have adhesion issues with PLA on the textured sheet. Here's a 3rd party textured sheet with PLA that is adhering properly:
The surest fix for adhesion issues on a PEI sheet is to take it to the kitchen sink and give it a good scrub under hot water with plain dish soap (Dawn or Fairy work well). Scrub it with a clean plain paper towel and dry it with another. Avoid touching the print area at all costs. Do nothing else and try your print again to see if it holds better. If you still experience problems, reducing the 1st player speed more (I use 20mm/s) may be as good as you can get, but definitely try to clear up adhesion issues first.