gr5: my reply seems to have disappeared, probably user error just like this printing problem. I loaded ABS and treated it in Cura as PLA. Doesn't work. Fixed that problem, then it printed well for a while.
Also replaced the temp sensor but the machine does not want to print below 65F.
And now I have an extrusion problem. Sigh. This technology really isn't reliable yet, I spend more hours on maintenance than on printing :-(
Thanks for your help, Hubert
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gr5 2,224
I've never ever heard of layers not sticking with PLA but this is common with higher glass-temp materials. Are you printing with ABS?
I think your temp sensor is flakey. You should watch the temp while it's printing. It should move very very slowly by 1C at a time and never increase or decrease by 2C within 20 seconds. If it jumps 10C at a time you have a bad temp sensor connection which is what I suspect.
You can't use solder in the temp sensors. Normal solder melts at 200C and even lead melts at 250C so instead it's a crimp connection which expands and contracts when you heat and cool. Some of these just weren't crimped quite right (imagine a tiny piece of brass o ring crimped around the wire connecting to the temp sensor lead).
I recommend you get a new temp sensor. I sell them for $18 (I think) here:
http://thegr5store.com or you can get them at fbrc8.
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