RoboBeast launch and House4Hack open day

Robohand prints 3d mechanical devices to aid amputees (upper limbs).  The creator of RoboHand decided to create RoboBeast – a robust, efficient, Africanized 3d printing beast. 


When: 15 February 2014 – 10:00 to 17:00
Where: House4Hack, 4 Burger Ave, Lyttleton Manor

Visit H4H to RSVP

House4Hack is proudly backing this event and will also showcase some other ventures:

* Meet Quentin, the designer of the award winning Morgan 3d-printer


* Quadcopter phun with the zarcdev team



* Solar braai – braai your boerewors roll using only the sun.  We are also planning to bake some breads and cake using our solar oven.


It is an event for the whole family and boerewors rolls and cool drinks available for sale on the day.

Reprap Morgan 1.75mm extruder

1.75mm filaments are slowly becoming mainstream, due to the design choices of the commercial 3D printer manufacturers.  That has recently caused me some long waiting times for 3mm filament, while 1.75mm rolls were stacked high…

Enter a reworked version of the ReprapPro mini extruder.


It is modified to use a 20mm M4 bolt in stead of the M3, with more readily available 624 bearings, and a new 10mm drive gear.  The reason for the changes were that my 0.4mm nozzle started to block, but not enough to look blocked.  This tripped up my airtripper, causing filament slippages, warps etc.  I needed something that could cope with the pressure.



The drive gear is 10mm OD, 8mm long and tapped M4 in the center, with M6 hobbed wormgear on the one side of the barrel.  I just edged off the two sides for it not to interfere with the sides of the 624 bearings.

This extruder managed to print past the blockage for an entire roll of filament.  Of course, when I cleaned the nozzle, everything worked infinitely better, but in the end, I gained a foolproof 1.75mm extruder.


The stl files are added into the Morgan repository, but you can get the extruder sources here:



Updated standard Morgan Slic3r print profiles

I have just committed a new set of slic3r settings to the calibration folder of the Morgan Git repository.

It is compatible with bleeding edge slic3r (0.9.11-dev) and should give any user a good platform for experimentation.
I am using it in my growing Morgan farm to make parts for the kits.

If you have variations on these that delivers particularly good results, please share!

Morgan @ Makerfaire NY

Frank Avery built a Morgan and brought it along to Nicholas Seward’s table (ConceptForge) at World Makerfaire NYC 2013


Here you can see Chris Lau with 3DPrintMi an the Left, Nicholas Seward with RepRap Simpson on the Right, and my small digital mug on Nicholas’ smartphone with Frank’s Morgan.

What a collection!

Morgan arm calibration guide

I have shot some video, showing the Pronterface console and the machine, but for some reason I have trouble with the sound of it.  I may have to narrate the whole thing….

In the mean time I have drawn up a flowchart that sums up the whole video.

Morgan Cal flowchart  (corrected version… Thanks Fig)

Please feel free to ask questions if anything is unclear.  This flowchart works great for me.

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