Printrbot Jr. Acrylic Printbed

by bwevans, published

Printrbot Jr. Acrylic Printbed by bwevans Mar 8, 2013


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An experimental printbed for printing PLA with no heated bed. The first layer extrudes into the engraved grid and the textured acrylic adds extra grip. So far has worked with every print.

Idea inspired by early MakerBot Cupcake acrylic printbed and the perforated phenolic printbeds used in Afinia printers.


To be lasercut from 6mm sandblasted or textured acrylic.

EPS as shown for use with a ULS VersaLaser according to the following colors:
Red (outline): vector cut
Blue (10mm squares): heavy vector engrave
Green (2mm squares): medium vector engrave

Avoid situations where a hot pinthead is parked in close proximity to the acrylic for a prolonged time as this may melt the acrylic.

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Nice, Im cutting out a simple xl bed this week and going to give it a try. Did you use the smae settings for the green and blue lines, or are they cut differently? Im using a Trotec laser.

Is there any other source files for this? I note that the Jr. bed is no longer the size to match this (they made it longer in the long dimension when they made all of their smooth rods 10 inches).

This design would be great for my printer! Do you know where to get textured acrylic? Does an online store sell it in bulk?

Also, what type of PLA are you using? It seems like different types would have different adhesive properties...

I suggest brims for smaller pieces (less 1cm) everything else works great..

how does this compare in printremoval to blue tape covered acyl?

i have the problem on builds with large contact area to the printplate that they stick realy realy good and i have trouble removing them without damaging the tape and the acylic below.

That sounds like an issue with being too close to the printbed on the first layer, squashing it down too much. Try Ed's platform level pattern http://www.thingiverse.com/thing:15709http://www.thingiverse.com/thi... and measure the result with calipers... it should be the same as or only a little bit thinner than your layer height.

Otherwise Ive only ran off a few prints and it grips quite a bit. Sounds like velcro when you peel it off but it does come off about like anything else.

Build Platform Level Test Pattern

how hard to remove things?

This looks great. Would you sell me one?

Yeah, this kind of part would have a good market. Not many people have a laser cutter AND a 3d printer. Perhaps work with LulzBot or Printrbot to sell them a stack so they can resell individual copies, if you don't want to directly market them.

Its not really worth my time honestly. There is always Pololu, Ponoko, or your local signshop or plastics co. Upload the file and have it cut in textured 6mm acrylic.