Any help with be very much appreciated. I have searched the internet and tried everything that I found. As the video shows, the test line or whatever it is called on the side prints fine. Then it does the outline and part of it sticks but pretty soon it detaches. I have replaced the hot end, levelled the bed, adjusted the z-offset so that there is some resistance when moving a piece of paper that is between the nozzle and the bed. I also cleaned the bed with methylated spirits and tried printing again. I then cleaned the bed with household dish washing detergent and tried printing again.
Better off with 99% isopropyl alcohol than methylated spirit, wouldn’t be surprised if the purple colouring and taste additive might get left as a residue which isn’t good for printing. As for z-offset, setting it up with paper is just the start, you will then adjust the z-offset while it is printing, you will see the filament squish into the bed, it takes a little practice to get it right.
I do all my z-offset testing with my nozzle ay 200c and print bet at 60. These are the temps the printer is going to operate and heat will make everything expand a bit. Download first layer testing print squares then you cand fine tune your z-off while printing and find the best value. I also use Elmer’s purple disappearing glue even though I have my PLA setting dialed in. I also preheat my bed to first layer temp and let it sit and heat soak for a few minutes before printing (I preheat my nozzle as well) Yes, ALWAY wipe the print bed with alcohol right before printing. I do it while it’s hot because the alcohol you get at the store is 91% at best and has some water and will leave a film. When wiping while hot that evaporates. I never use auto-z-offset and make sure my offset is the number I found while testing. That solved a bunch of first layer issues. YMMV