that head is too close to the plate. that needs to change first. the first layer needs to be smooth, there is now too much material extruded causing it to ripple.
as far as adhesion, the glass plate, when cleaned properly, should not adhere well to PLA. you should put on a very very small layer of Tesa Eco Stick. that will resolve your issue
the bed should be 60 degrees, and the temp for the nozzle should be 10 degrees higher than before if you were using 210 before, use 220 now.
Thanks for the reply.
I've uploaded some photos of first layer fun at https://goo.gl/photos/JrSexQV8pC7APQfa7 - you can see some in-progress where the print head appears to be running over the layers it just put down.
I've definitely leveled the bed (several times, at various different levels) and cleaned the bed with hot water and Windex (ammonia-based glass cleaner). This has always been our process in the past without problems.
Increasing and decreasing the nozzle temperature made no difference; I varied 10C +/- from 210C on the blue print in the album, in 5C increments, with no visible difference.
Varying the bed temperature, which has worked previously, is actually having negative effects now; in the last grey print in the album that was varied up from 60C to 80C with a stop at 70C without any real impact (other than it getting worse at the end).
Any other ideas? Thanks!
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