MakerGear Forum

I recieved my mic6 with PEI from insta, which has finally given me none warped ABS parts. But, I have some whitish residue when removing the parts from the PEI. I have taken acetone, isopropyl alcohol, and cleaned the PEI as good as I can and it still seems to the residue. Sometime worse the others.

I started out with a build platform temperature of 120° and I'm now at 90°, with the part shown in the picture. I can probably go down to 80° and still get no warping. But is there anything I can do about the white residue.

That looks like stress marks -- hit it with a heatgun. I bet it goes straight back to black ABS.

Thanks, I will give it a try once I get home from work

insta wrote:That looks like stress marks -- hit it with a heatgun. I bet it goes straight back to black ABS.

I found some info on the web, now that I know what I'm looking for, that says stress marks are caused by being to close to the pei. I will give one of my previous prints the heat gun treatment, and will raise up my nozzle a bit to see if that fixes it for good.

The heat gun works well on sturdy parts, but can cause trouble on thin, flimsy pieces, so be careful with the heat.

I little buffing with steel wool will take that off too.

Heat gun works great, tried on a few parts. Found that a temperature of 450° works good, 250°f takes to long.