How do I fix these Bumps?  

Re: How do I fix these Bumps?

Are you asking about the retract - wipe doodles on the letters? It is stringing, plain and simple. You can play with retraction settings, reduce print temps at the last layer, increase the wipe distance... Since different filaments respond differently, the fix that works for you won't be what works for me.

Re: How do I fix these Bumps?

"reduce print temps at the last layer"

How do I change the temperature of the last layer with Slic3r PE?

RE: How do I fix these Bumps?

For that, you need a custom script. Add something like:

{if layer_z > 5.00} M104 S200; 

to your "Before layer change" script dialog. Adjust the 5.00 height to whatever the thickness of your print, minus the last layer (and a half, you're comparing floar numbers) is.

Nevertheless, I don't think the temperature will change much. Removing Z hop, increasing coasting after retract will probably do more. But the easiest way is to simply cut them off with a sharp blade.

RE: How do I fix these Bumps?

Posted by: vojtěch.p6

For that, you need a custom script. Add something like:

{if layer_z > 5.00} M104 S200; 

to your "Before layer change" script dialog. Adjust the 5.00 height to whatever the thickness of your print, minus the last layer (and a half, you're comparing floar numbers) is.

Nevertheless, I don't think the temperature will change much. Removing Z hop, increasing coasting after retract will probably do more. But the easiest way is to simply cut them off with a sharp blade.

When adding an if statement in custom g-code, don't forget to include the

{endif}

RE: How do I fix these Bumps?

When adding an if statement in custom g-code, don't forget to include the

{endif}

Yes, my bad, the statement above was incomplete.