BJ Robot

Dangerous Ladies' 3D models for BJ the Robot.
Model by Jennifer Rezny (@quicksparrows)

.stl format.

This is a big project! BJ stands at roughly 24” tall when finished, which is 1:1 scale. To print his main body in one piece, you’ll need a printer with a footprint of at least 220mm x 220mm and 200mm tall, but because he prints in so many small parts, you can print all of him on much smaller printers. He is over 50 parts total. Please pay attention to file names, especially for the legs; many parts need to be printed a second time mirrored to get the opposite legs.

He has some articulation, including the ability to turn his head. This is especially handy for making him look at the camera; it makes him more lifelike! He can be assembled so his head, neck, body, arms and legs all print separately and assemble with magnets for storage and travel. His head is hollow and is designed to install lights/electronics, and he can be largely assembled after painting.

While his wheels can roll, because the original design has his legs in a V shape, he doesn’t roll very well. You can just permanently seal wheels to their chassises if you'd like.

Head:

The head is made with a number of optional features.

• The front and back plates print separately to save on support material and make painting easier. They can be mounted permanently or they can be removable with the included magnet slots. Each plate takes eight 1/8” magnets, max 2.5mm deep, for 16 magnets total. I suggest just permanently mounting the front after you’ve painted it and leave the back removable if you want to be able to access electronics for the eyes or take off the head. Because the fit is fairly tight, you may want to add a loop of ribbon or something on the underside of the back plate that sticks out so you have something to grab to pull it off.
• The eyes are hollow and can be printed in clear filament (or clear resin) so they can be illuminated. The eyes slot into the front housing and can be glued in place permanently or you can use the provided 1/8” magnet slots to make them removable. Each eye takes four 1/8” magnets, max 2.5mm deep, for 8 magnets total.
• The top of the neck has a post that slots into the head and then has a cap that goes on top to lock it in place. It’s made this way so you can mount the head securely while still being able to turn his head for photos. You can either glue this cap in place permanently or you can use the included magnet slot. This magnet slot is 1/2” and can accommodate a maximum of 3mm depth. With the magnet slot, you can remove the head for travel/storage.
• The base of the neck slots into the body on a post, but it also has a magnet slot for a 3/8” magnet, 3mm deep. You can use this to make the neck removable from the body or you can glue it together permanently. Even if you assemble the rest of the body/legs/arms permanently, I do suggest making this one removable because you can then carry the head/neck around the con in a bag casually when you don’t feel like lugging around the whole body.

Arms:

His arms are symmetrical and reversible; you can install two closed arms, two extended arms, or one of each. You can also make extra arms and swap them in and out as desired for photos. The base of the arm mount has a slot for a 1/2” magnet so they’ll stay nicely, but you can just skip the magnets and glue the arms in permanently too. Each arm mount takes two 1/2” magnets with a max depth of 3mm, so you’ll need a minimum of 4 total for a set of arms, with extra for alternate arms.

The extended arm can be tricky to print in pieces, so I’ve included a separated version.

Legs:

The legs take the following dowels/spokes for the wheels. I have included files for them but you may want to just cut segments of dowel or aluminum, they’re more durable.

Front wheel: 37mm long 1/2” dowel x2
Middle wheel: 63mm long 3/8” dowel x2
Back wheel: 50mm long 3/8” dowel x2
Femur: 70mm long 5/8” dowel x2

The legs are also removable from the body if you install them using the 3/4” magnet slots, but you can also glue them in permanently too.

Files include:
- Photos
- .STL files

Please do not redistribute or resell. Intended for personal use only. Commercial use must buy a new copy for each item produced.

Feel free to tag us to show us what you print and make! We love to see finished works.

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