Gear making software recommendations?

Talk about all things CNC
Post Reply
kristenanne77
Posts: 423
Joined: Thu May 08, 2014 11:34 am

Gear making software recommendations?

Post by kristenanne77 » Sun Aug 03, 2014 1:38 am

For Gearmaking, I came across these two on the web: gearotic and gearify.
It looks as if Gearotic does round gears and Gearify does "shaped" gears (other than round). Has anyone used these programs or some other gear making program.

I also would be interested to see how to build the gears mysef with a cad program, if it isn't too time consuming.. Currently i have Inkscape and QCad, both are freeware, and also CUT2D which is commercial but has limited cad capability.

Thanks
K

WillAdams
Posts: 8489
Joined: Mon Apr 09, 2012 6:11 pm
Location: Pennsylvania --- south of the Turnpike, East of US-15
Contact:

Re: Gear making software recommendations?

Post by WillAdams » Sun Aug 03, 2014 2:01 am

We've a section for them on the wiki:

http://www.shapeoko.com/wiki/index.php/CAM#Gears

(but it's hard to find --- considered putting it under CAD, but some of the programs go directly to cutting files.... added a note on this there.)

Drawing them yourself is pretty straightforward, just have to get the teeth shaped properly so that they mesh. Easiest thing to do is to:

- determine the proper size for a tooth (it will need to be an integral of the diameter of the gear)
- draw a complete tooth, both positive (top) and negative (bottom)
- position a pair of them top (addendum) and bottom (deddendum plus clearance) along the circumference of the circle which will become the gear
- power duplicate the pair, rotating the proper number of degrees to match the desired number of teeth
- select every part which will be an addendum and add it to the circle
- repeat for the remaining parts, but subtract them

I know that would be trivial in Freehand, and I'd be able to manage it in Illustrator --- I'd hope it would be possible in Inkscape or QCad
Shapeoko 3XL #0006 w/Makita RT0701 Router w/0.125″ and ¼″ Elaire precision collets
Nomad 883 Pro #596 (bamboo)

DanMc
Posts: 257
Joined: Fri Apr 13, 2012 3:34 am

Re: Gear making software recommendations?

Post by DanMc » Sun Aug 03, 2014 4:13 am

I've been using http://hessmer.org/gears/InvoluteSpurGearBuilder.html which was recommended in the Guerrilla Guide to CNC Machining and I find it works really well.

There is also a page on there for drawing your own gears - Practical part geometries, which has a really great explanation of the geometry of gears as well as practical information about designing them to work properly.

CamBam also has a gear widget which I have used and works pretty well although I find the ones from Hessmer's program to have nicer geometry

cvoinescu
Posts: 4442
Joined: Thu Jul 19, 2012 6:50 pm
Location: Camberley, UK
Contact:

Re: Gear making software recommendations?

Post by cvoinescu » Sun Aug 03, 2014 11:38 am

Will, how do you draw the involute shape? Or you just eyeball it?
Proud owner of ShapeOko #709, eShapeOko #0, and of store.amberspyglass.co.uk

WillAdams
Posts: 8489
Joined: Mon Apr 09, 2012 6:11 pm
Location: Pennsylvania --- south of the Turnpike, East of US-15
Contact:

Re: Gear making software recommendations?

Post by WillAdams » Sun Aug 03, 2014 12:02 pm

I usually draw 3 paths in a row, then add nodes, shift them around and subtract one from the other until I have a reasonable shape which snaps together, but looks to have reasonable clearance and then split two of them in half, align them, then union them.

Yeah, I guess I eyeball it.
Shapeoko 3XL #0006 w/Makita RT0701 Router w/0.125″ and ¼″ Elaire precision collets
Nomad 883 Pro #596 (bamboo)

Auarhau
Posts: 243
Joined: Tue Feb 25, 2014 8:46 pm

Re: Gear making software recommendations?

Post by Auarhau » Sun Aug 03, 2014 2:15 pm

ShapeOko 2. Nema 17 74 oz·in. GAUPS shield on Arduino Uno. DRV8825 Drivers x4 . Kress 1050 FME-1. Z Acme Screw. Threaded inserts table.

Post Reply