Welcome to the SeeMeCNC Community

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

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.

precisionpete wrote: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.

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

bot wrote: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?

Paging Dr. Hackney...

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

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.

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.