Cherry picked Planet Reprap - A RepRap blog aggregator

July 24, 2016

New reprap images on Photobucket

Thingiverse - Newest Things

Peristatic Pump for Geared Steppers

Working on a pump for printing 1 m tall statues out of clay / cement...

Parametric model is public onShape:

by shauki at July 24, 2016 02:53 PM

QAV210 GoPro Mount

Simple, strong action-cam mount for the QAV210 frame.

Simply screw onto the top into the existing standoffs, then post a cable tie or whatever you want to use through the slot and fasten your camera into it's seat.

by Mittens31 at July 24, 2016 02:50 PM

Thingiverse - Newest Derivatives

Decade Resistor Box - Side Connectors

This is a modified version of Decade Resistor Box by Brockas.

See their design for more details.

I moved the banana plug connectors to the side and modified the size slightly to account for that.

In my photos the 10k resistors are SMD and the 1R are missing for now, but it's more about the box than the decade :)

by arturo182 at July 24, 2016 12:52 PM

Low-Poly Pikachu Keychain

This is a keychain remix of Low-Poly Pikachu by FLOWALISTIK

by 100021028 at July 24, 2016 12:46 PM

July 21, 2016

La Grotte Du Barbu

Engrenages En Bois – Fabrication d’engrenage en contreplaqué – LaGrotteDuBarbu Ep 152

Cette semaine on tente d’imiter mon idôle Matthias Wandel en essayant de construire un engrange en bois…

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by babozor at July 21, 2016 05:00 AM

July 20, 2016

A big failure

After about 20 small test prints to make sure the connections fit, I finally printed the full version of a replacement trash can foot. Unfortunately, while I was away, something went strangely awry with the print, with one part being printed way to the left and other smaller skews happening too. Being on my way to Sotahuuto, I didn't investigate a lot, save to check that the X shaft connector was solidly on. The motors have not previously run hot, I didn't check them here, though. Bummer.

The failed piece:

 Part entirely shifted left. Did it come loose, warp up, and get pushed? 

by Lars Clausen ( at July 20, 2016 04:37 PM

Aaron Eiche

Early Morning Project: RasPi Zero Roomba

I can’t sleep. Instead of sleeping, I’m hacking robots. Last year during my winter holiday I wired up a Raspberry Pi to my Roomba, to drive it around and such. More recently I got a Raspberry Pi Zero and wanted to do the same thing.

RasPi Zero Roomba

You may be asking “if you’ve already done it with a Raspberry Pi, are you really doing anything new?” The answer is “kind of.” In the previous version was an original Raspberry Pi Model B. I also used a USB-to-serial cable. This version upgrades to a Pi, and uses the onboard UART. So fewer components. Again, I used Jason Bradshaw’s excellent iRobot Node Library.

There were a couple of hiccups setting this all up:

Level Shifting

The Raspberry Pi Zero operates at 3.3v. The Roomba’s serial lines operate at 5v. Fried Pie sounds amazing. Fried Pi sounds like an expensive tragedy ($5 Pi Zeros are cheap but super-unavailable) So I needed to put together a level shifter. I had an AdaFruit Level Shifter sitting around from several years ago, so I soldered that up. The Pi’s pins have 5v and 3.3v, so I was easily able to wire things up.

Level Shifter

What Serial Port?

On my previous Roomba Pi project, I used a USB-to-Serial cable because it was a super simple solution. Trying to use the serial on the Pi wasn’t obvious. At first, I came across an article that said to use the standard Linux port /dev/ttyS0. That failed – it turned out I didn’t have it. Exploring the /dev directory I found the real port /dev/ttyAMA0, but that didn’t work either. It turns out you have to prevent the operating system from taking it over. This is done in the Raspberry Pi config (sudo raspi-config go to Advanced and then to Serial)

Screen Shot 2016-07-20 at 2.20.23 AM

Get the right speed, please

This is kind of dumb, but I couldn’t get it connecting correctly at first because the default in the library was 57600. The Roomba 500 series+ communicates at a default of 115200 bps. Simple fix, and I was off to the races.

The test.js provided in the library is decent for getting going with some basic sensor readings. Now that I’ve gotten the robot up and running, I may ditch Node in favor of Python. I know Javascript better but Python has a strong set of OpenCV bindings, and I’m interested in diving into doing some computer vision stuff.


by Aaron at July 20, 2016 09:38 AM

July 18, 2016

La Grotte Du Barbu

LaGrotteDuBarbu – Ep 151 – RelouDynamique / Composant Dynamique avec SketchUp

Un petit épisode utile pour une fois, où comment utiliser les composant dynamiques ou dynamic components sous SketchUp…

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by babozor at July 18, 2016 07:36 AM