Z-mesurements before prints are sometimes slowing down
Hello again,
Just to be sure, before each print there are 7x7 Z-measurements. Sometimes a few of them are slower than the others.
You can see that in the video below, at 0:32 and 1:06. Is that normal ? Maybe some I/O is made and this slows down other task, like in a computer ?
Thanks
RE: Z-mesurements before prints are sometimes slowing down
Yes, it's normal. You might try repositioning the printer to see if they move. If they're always at the same spot, check the nozzle and under the sheet for stray filament. Try moving the printer to a solid surface or the floor. In any case, so long as it finished Leveling, you should get good results.
If it fails to complete, there are some troubleshooting steps.
RE: Z-mesurements before prints are sometimes slowing down
Thank you @bobstro. I'll check but I think the position often changes and that sometimes all 49 points are normally fast.
RE: Z-mesurements before prints are sometimes slowing down
From the video, it looks like those are what are sometimes called 'double tap' probes, where it pauses and repositions and senses again.
A few of them are in the range of normal. Best is, of course, doing the whole 7x7 without any double taps.
I've found that they most likely occur on my machine when I've been printing a while with PLA and then switch to a higher temperature filament such as ABS or even PETg. I believe they may be related to thermal expansion. After a run of ABS prints they seem to disappear. I have not, however, seen them reappear when going back to PLA.
A couple of times I've had a 'worm' get stuck between the heatbed and the build plate and when that happened it would double-tap on several of the left side probes.