PEI not exactly flat, do I sand it?

[Fiddler2070]

Hi guys,

I have a piece of PEI on the glass bed. It works wonderfully. I can easily pop prints off after the bed cools by 10C.

I was doing fine calibration and found out something interesting. Calibrating in front of each of the towers the bed is flat by .01mm. The problem is this.

I was doing single layer calibration circles and found that in front of the Z tower closer toward the center, there is a rise or something. Anyway, the spot of about 2x2 inches is higher than the rest of the bed by about 0.15mm. Should I just sand this spot down? What grit do I use to do this? 2000 grit for final finish of the surface after sanding?

It is really annoying to find a high spot on an otherwise flat bed.

Thanks.

Felix

[precisionpete]

Flip it over and check.
Short answer is yes but lap it onto a flat surface instead of trying to locally remove the bump. You could just make it worse.

[Fiddler2070]

Flip it over and check.
Short answer is yes but lap it onto a flat surface instead of trying to locally remove the bump. You could just make it worse.

Can't flip it over. It's already attached to the glass bed.

[bot]

People remove and re-apply the PEI, even after flipping it, quite frequently. Just clean it REALLY goodly like.

[Fiddler2070]

People remove and re-apply the PEI, even after flipping it, quite frequently. Just clean it REALLY goodly like.

You mean just rip it off the glass? So it just comes off?

[bot]

Paging Dr. Hackney...

I've never done it. Use a splash of alcohol to get it started? razor blades could help too.

[3D-Print]

What exactly did you attach the PEI with.... Was it the strips of adhesive or the sheet of adhesive. I tried to remove the PEI from the sheet of adhesive and stopped due to the concern of breaking something. I understand that if you use the strips of adhesive it does come off.

[Tincho85]

I wouldn't mess with the PEI. 1mm thick right?

Why don't you sand the nylon spacers?
They are cheap, and could be easily replaced.