ABS Warping and Seperation Frustration using PEI

[adamfilip]

Things were working so well..not sure whats going on now

I ended up Taping down my PEI Sheet to my 1/4" glass bed
to help with flatness for more layer consistency. since then
Ive been having alot of problems with anything sticking to the PEI

I wet sanded the PEI sheet with 1000 grit, and cleaned it with 70% ISO Alcohol
Double checked my first layer height...

Bed temp 120, Hotend 235-245 with Black ABS
.40 nozzle E3Dv6 .3mm layer
35% Fill
150% first layer width
Tried using Skirts.. doesnt seem to help
I partially enclose my printer with cardboard to prevent drafts
doesnt seem to matter if the bed has been heating for 30 min prior to printing.
Using ABL

[dunginhawk]

if that bottom pic is your first layer, lower it.. thats not enough (in some cases) to get a good adhere to PEI.