PEI residue

[theboz1419]

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.

[insta]

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

[theboz1419]

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

[theboz1419]

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.

[zemlin]

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

[sthone]

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

[theboz1419]

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