metal 3d printer

[Eric Davies]

Thought I'd point out this thread. Another maker space with a metal powder printer up for grabs.

https://plus.google.com/s/G'day%20everyone%2C%20i%20have%20got%20some%20DMLM%20experiments

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Eric Davies

250 595-0639

[Craig Carmichael]

Hi, I've invented an inifitely variable transmission where one smooth
lever takes it from reverse through 'idle' then low and medium to
high.

I'm making plastic gears for it, and wondered if the laser cutter can
cut thick UHMW polyethylene plastic? Currently i have a small piece
of black, but mostly it's white.

If it does, can anyone recommend software to design involute gears?

Other suggestions?

TIA,
Craig

(More info: http://www.TurquoiseEnergy.com/ - see latest newsletters)

[Derek Jacoby]

afraid not. Melts like crazy. CNC is your best option on that one. Or sending it out for waterjet if CNC is not fine enough.

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[Dave Pankhurst]

Involute gear designers are something I've looked into in detail for my projects - for gears, there are online designers:

http://geargenerator.com/

https://woodgears.ca/gear_cutting/template.html

Also, woodgears.ca offers a windows program for $26:

https://woodgears.ca/gear/index.html

I can recommend it - I use it to design and then export into sketchup.

Finally, if you prefer programming, code I bookmarked (but never implemented) is here:

http://www.codeproject.com/Articles/1037482/Drawing-Gears-Circular-and-Non-Circular

Hope this helps,

David Pankhurst,

UtopiaMechanicus.com

P.S. If gears 'drive' you (sorry) there's also a fun video from the 1930s on youtube showing many exotic types in action: https://youtu.be/dqohSjJrQWs