You can test your updates on 100 printers without problems, while you could track down any errors easily with using just a few of them with a relevant mix of HW/SW versions.
But this only works if you don't have lost track already of what you have sent out to the market.
i have an original ballscrew from the kickstarter ones.
its a v1 and i dont want to put my serial # on the forum
send me an email address to send it too
thanks
lou
I've just made another test (calibration + print) on V1 + oldest ballscrew available printer. Everything went fine. Can you send me a photo of your plate and mark a place where nozzle hits it?
FWIW FW 1.0.4 seems to be working fine on my Ver 2 printer with ver 2 hot end, at least with ABS. I've printed a dozen or more parts in the past couple days with no problems at all.
Nozzle crash can be caused by a problem with the red conductor in the small bed connector. Broken wire, bad contact, or broken solder connection to the bed. The firmware detection for missing/bad bed connector uses the black and white wires and cannot detect a fault with the red wire.
I've now experienced this as well although I can't reproduce it. Scrapped the metal off on my platform so I can't use it anymore to calibrate as it never senses the touch anymore. ;-(
I thought it had to do with a calibration failing and leaving the extruder at the back of the platform and then trying to calibrate again (this is when it failed for me as if it didn't know where the print head was and tried to move it as if it was still in the center) but I wasn't able to get it to do this twice so I'm somewhat confused as to what's causing it.