Gowanus Monster - Margo Series

by boldmachines, published

Gowanus Monster - Margo Series by boldmachines Jun 8, 2015

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The Gowanus Monster. Legend tells of a beast that haunts the darky depths of Brooklyn's Gowanus Canal. Unsuspecting hipsters who dare to approach the edges of the canal late at night are thought to have looked into the eye of the beast - then hypnotized by the strange glow of the eyes, have jumped into the canal. If they are lucky they are washed up near Whole Foods with no memory of what happened...

As part of the Margo Series - the Gowanus Monster is the Aquatic Robotic Vehicle (ARV) that searches for an ancient underwater city - rumored to be located near the Gowanus Canal. Developed by Mr. Walthersnap, the ARV uses echo location and vacuum tube technology to navigate.

Gowanus Canal: http://en.wikipedia.org/wiki/Gowanus_Canal

Printed on a MakerBot Replicator 2x (ABS) and a MakerBot Replicator Z18 (PLA).

Designed by Sean Charlesworth: http://opus5.complex88.com/


Designed and modeled for Bold Machines by Sean Charlesworth

Pins by whpthomas from his PLA Cube Gears for Replicator 2:

All files have been run through mesh repair and are print-ready. Most parts print wihtout support.


body bottom x1 5% / 2 shells / raft
body top x1 5% / 2 shells / raft
body-head pin x8 5% / 2 shells
eye window x2 10% / 1 shell
fin side x1 10% / 1 shell
fin top x1 10% / 1 shell
head x1 5% / 2 shell / support / raft usually not needed
porthole x6 10% / 1 shell
prop x2 0% / 1 shell / slower speed recommended
prop housing x2 10% / 1 shell
tentacle 01 - 04 x1 each 5% / 2 shells / raft & support - slower speed may help, have had some success printing without support
tentacle pin x4 10% / 2 shells / raft
platform x1 10% / 1 shell
platform arm x1 10% / 1 shell
platform front cradle x1 10% / 1 shell
platform rear cradle x1 10% / 1 shell


porthole insert x6 - used as a different color window insert for portholes 10% / 1 shell
eye window DUAL frame - used with insert for a dual print eye window 10% / 1 shell
eye window DUAL insert 10% / 1 shell


  • Insert pegs into body bottom
  • Put side fins on pegs
  • Put top body on pegs
  • Insert pegs into head (make sure to remove support material)
  • Put head on body assembly
  • Glue in: top fin and portholes
  • Glue on eye windows, there's no alignment key, so rotate to desired angle
  • Put props in housing, they will friction fit so they can rotate
  • Glue prop assemble to head
  • Gently insert pins in tentacles (make sure to remove support material) & snap into head - order does not matter
  • If porthole inserts are used, print in contrasting color and glue into portholes

  • Glue platform arm to base
  • Glue front and rear cradles to arm. The arm is marked with 'F' to indicate front position. Cradles are marked 'F' and 'R' for front and rear. Arrow next to letter indicates front-facing orientation for installation
  • Front cradle sits underneath the head

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hello, looking at your robotic arm, I thought you might like this project, "magic lamp completely made of pla from 3D printers capable of making objects by hanging them with white light who wants can make it by downloading the plastic

Its so lovely... If you want to make a rc versión tell me i want to probe it,
. sorry for my bad english

when are new figurines coming out, I have built all of these and they are great, I would luv to see some more like mr worthersnap

i love the that you made bro do you like monster if you do i want to know place tall me bro and i will tall you to bro

I had to shrink the eye insert to fit the eye frame but everything else came out great thank you for this awesome model.

It makes me sad that you didn't share the source files. I would have learned stuff from that.

Hey guys, I printed this out if fantastic but I have an issue with the port holes not fitting into their slots, At first I thought was the abs that shrank with printing so I printed another out of pla, and same issue, So then I thought perhaps it was a Z axis miss configuration issue, after printing several test fit both veridical and horizontal test prints all of them fit perfectly, So perhaps im having some other issue, or have any of you had same problem ? im far from new to printing and before this on I never doubted my printers calibrations. so perhaps simple fix would be to simply scale the port holes just enough for them to sit right but nevertheless any input from other that has printed would be appreciated

printing all the legs at once made it much cleaner

Would like to motorized this to use as a fantastic submersible, I teach robotic engineering in San Antonio. ANy suggestions

Hey -

You'd have to print it out and then seal it up tight - probably weight it down somewhat.

If you have access to a larger format printer - then I'd suggest increasing the scale.

Updated files. Attached is a new version of the propeller with a beefed-up shaft so it will print better and not snap off so easily. An updated version of the prop housing to match is also included.

um how big prind bed = needed?

You can get away with a much smaller print bed (6x6) for most parts except the side fins - but someone posted a remix with it chopped up, so problem solved!

Replicator 2 size.

11.2 X 6.0 X 6.1 IN

darn, it wont fit on mine. i have a 100x100x100

I've noticed that the newest version of MakerBot Desktop tries to put support underneath the entire head - it only needs it under the pin holes. To get it to do this on new version, rotate the head by about 20 degrees.

Hey Boldmachines,

I edited the Mid Frame model to allow me with smaller 3d printers (cough cough Printrbot Simple metal 6x6x6 bed) to print the full size model. Could I give you the model to allow people with smaller printers to print this?

Just post it as a remix.

Thanks Count Spatula !

I put together a ball and socket joint tentacle that should be poseable. Search under Gowanus to find it.

Fantastic model! Thank you.

Added in Porthole cover - Thanks Count Spatula !

Designer of the Gowanus Monster here, I uploaded the missing porthole insert:

Gowanus Monster Window Insert

In your instructions you mention a porthole insert file but I didn't see one I could download.

Nice Steampunk style. Can't wait to see what mods people are going to do with this baby.
Lights and articulated tentacles are a must.

See, I was all gung ho to print this, but now you made me want to wait on the off chance of a remixed improvement. lol