PrusaSlicer Addon to create precise brim ears

Is your feature request related to a problem? Please describe. Brim ears are used to prevent a print from warping. It is difficult to place the brim ears exactly. When they overlap the object to be printed, the effect is very visible in the print. When they are not close enough, it is complete useless to put a brim ear.

Describe the solution you'd like Playing around with the possibilities, I found a way to make them very precise:

Create a negative first layer copy of the object to be printed.
Scale it down so the size is 100%-minus a compensation for the elephant-compensation.
Save in galery.
Put object on plate.
Place brim-ears (as instances)
Add a negative part to the brim-ears, using the scaled negative first layer from the galery.
Adjust the negative part exactly to the placement of the object. DONE. The brim-ears will fit exactly. See https://www.printables.com/model/681785-precise-brim-ears-preventing-warp for an explanation with images.

I think it should be quit easy to program this as an " Add brim-ears" in prusa-slicer.

Happy printing,

Regards, Eef

Apr 09 '24 18:04 eefweenink

“When they overlap the object to be printed, the effect is very visible in the print. When they are not close enough, it is complete useless to put a brim ear.“

I think I have the solution for you it results in the discs actually forming part of the first layer but not so much they are hard to take off and when they are removed you cannot tell they were there.

place your part on bed
Right click add shape from gallery and add the “helper discs”
copy and paste as many as needed and position
Once finished and this is the key! Select all the instances (the part and all helper discs) in the right hand menu with the shift key then right click and merge.
Once sliced you will see the bottom layer and all discs become one!
because they are part of first layer it stops warping well but at same time the helper discs can be removed by hand.

Is that what you need? If not ignore me haha

Apr 10 '24 08:04 wafflecart

Also agree with your overall comment, a good feature in the slicer would be a button you click to add helper discs, mouse ears, brim ears whatever you want to call them.

Could be done by the slicer detecting sharp corners and adding discs to the center parts of those corners.

Apr 10 '24 08:04 wafflecart

Once finished and this is the key! Select all the instances (the part and all helper discs) in the right hand menu with the shift key then right click and merge.

Once sliced you will see the bottom layer and all discs become one!

If I would have known that, I would probably not have suggested the feature. But there is a difference. Not much, but might give the "finishing touch"