first layer help

[pleazer68 0]

trying to print the largest and longest print ive ever attempted. need some help as im having first layer issues.

with my bed leveled my first layer prints at different heights.

can some one help

 

[Labern 775]

What material are you printing with?

Did you clean the tape with Alcohol?

 

[yellowshark 153]

What is your 1st layer print speed and extruder temp.? What is your bed temp.? Did you measure your bed temp, i.e the vast majority of it, with a digital thermometer to check the temp. before starting to print? How many times did you try to set your bed levelling - were you absolutely meticulous?