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Minecraft Creeper - With Movable Head

by Conseils, published

Minecraft Creeper - With Movable Head by Conseils May 4, 2013

Description

This is a Minecraft Creeper design with a movable head implemented with a press fit clip design.

Recent Comments

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Just printed this in green PLA for my son, he's going to flip for it. thanks for sharing this.

Thanks for making this! Printed very well.

Glad you enjoyed the thing. Compliments of the season.

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Instructions

Instructions
Download the STEP files and modify as required. Upload your modified files into Thinigiverse.
- or -
Print the STL files, one of each. Settings detailed below.
1) Calibrate your printer for dimensions
2) Print 1 of each STL files
3) Assemble on a firm flat surface!
4) Press clip firmly into head
5) Press head and clip firmly into body

The clip arms are designed to compress together completely and be a snug fit into the holes in the head and body. If your printer produces blobs on parts you may have to clean up the clip to avoid issues assembling the clips. The images shown are how Huxley #710 prints parts, no clean up was required or performed. Similarly if your holes are too small or too large then you might have issues, with the STEP files you can tweak things if you prefer.

Background
The Minecraft Creeper shown here is a derivative of Thing 11825. The boys wanted a version that had improved facial features (no drooping) and a swivel head. So I created a clip that fits into the body and head. We have printed around 10 of these now, as the boys friends wanted some. At Maker Faire UK (Newcastle), Creepers were seen hanging out on top of the Printercraft computer monitors. But yours could look around (The leg pitch is just over 11mm).

Derivative changes
I re-drafted this part from scratch based on the parented Thing 11825

Design For Manufacture
By removing the head from the body, the head can be printed without the drooping seen in the green creeper (our first, whose head does not move). The mating features are designed to locate and allow rotation. The clearance between the head and body bearing location diameters and the clip centre locating diameter is 0.20mm by design. To accomodate the slightly out of round holes manufactured in FDM layer manufacture. The clip deformation assumes a non brittle material in this case Faberdasherry PLA. As the clip is significantly deformed on insertion into the head and body. The part was printed as three elements as a clip on the head or body might have needed material support. The clip is intended for use in other assemblies and allow for repair, if required. Which would be more difficult with an integrated clip. At the time the clip was designed, there were limited versions on Thingiverse. A redesign might use one of the clip designs on Thingiverse.

Safety
This item has small parts and is not suitable for young children as a result. With some effort our Creeper head could be removed, unlike Lego Duplo characters for example.

Sample Part Manufacturing Technical Documentation
Printer : Huxley #710 (RepRap Pro)
Firmware : Marlin 1.0.0 RC2 - 15 Feb 2013
Software : RepRap Pro Software 811708f - Pronterface
Material : PLA - Faberdashery - Arctice Whilte - Village Green
Material Dia. : 1.75 mm (Msd 1.80 mm )
Nozzle : 0.50 mm
Layer height : 0.25 mm
Layer width : 0.6 mm
Extrusion T : 198 C
Bed T : 60 C
Feed Rate : 28 mm/s
Perimiter rat. : 0.5
Infil pattern : Hexagonal
Infil solidity : 0.15
Cooling Fan : Yes
Bed material : Borosilicate Glass
Over hangs : Yes
Support : No

Design For Manufacture Parameters
Model : Absolute dimensions
Scale : 1:1
Holes : Yes
Layer height : 0.30 mm
Layer width : 0.6 mm
Over hangs : Yes
Support : No

Model Tools
Function: Model Fix up
Tool: NetFab Studio Basic
Version: 4.9

Comments

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sablebadger on Feb 1, 2014 said:

Just printed this in green PLA for my son, he's going to flip for it. thanks for sharing this.

TRosenbaum on Jan 17, 2014 said:

Thanks for making this! Printed very well.

pcenginefx on Dec 26, 2013 said:

Made about 6 of these for my friend's kids and they all print great (green ABS, printed in low, medium and high qualities). Thanks for the Thing!

Conseils on Dec 26, 2013 said:

Glad you enjoyed the thing. Compliments of the season.

Conseils on May 6, 2013 said:

The connector pin was one I arrived at some time ago. I am please the solid cylinder works for you. There are many more clips on Thingiverse that you might find better.
e.g. http://www.thingiverse.com/thi...

The key difference with this pin is the location diameter, reduced stiffness for the arms to lower the insertion force and clearance at the tip. I was thinking of putting a sprung element in the bottom to help push the arms out. However left this out as the production run of 10 of these including one 'golden creeper' kept getting in the way. We fount the clip design resilient to normal 11 year old use in school! Faberdashery filament was used for the clips as well as the head and body.

FlyingCat22 on May 5, 2013 said:

Just what I was looking for. The conector pin is horrible, but a solid cilender works great!

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