Openscad gear library free#

The result is dragged into the center of the OpenSCAD gear, aligned with the center and then combined. You can see the alignment mode dots used to give the doughnut hole & original gear a common center Then it is toggled back to a hole so it can be used for trimming the original's perimeter. The larger is toggled back to a solid before combining so it will remain. The dots represent axis & edges along which the selected objects can be aligned. Here both 'holes' are aligned on their center using the align option. The other copy of that hole will be used to preserve the core of the original gear. You can use it to centering on one or more axis at a time, or align on an edge.Ĭombining the 'hole' and the OpenSCAD gear leaves just the perimeter. Tinkercad has alignment options for multiple objects. Using the ALT key + click & drag lets me pull a copy of the smaller cylinder over to core out the OpenSCAD gear. That will also be the size that needs to be removed from the OpenSCAD spur.

I can use another cylinder shape to layout the size of the portion I need to keep.

I can make one the size needed by using a cylinder shape, making it a hole so I can see through it, and superimpose it on the original spur gear and adjust to get the size I need (a bit more than the original's dimension). You can also combine elements into new ones or break apart elements that were previously combined.įor example, if I break apart the doughnut like 'holes' in the above screen shot, I get the elements used to create them.Ī doughnut shaped hole is a good mechanism to removing the outer perimeter of a circular object. Any given component on the screen can be made to toggle between being a solid or a 'hole'. The center of the new gears will be removed & replaced with those cores. Using copies of the original gears (created by pressing the ALT key & dragging it away from the original), I will strip off the outer perimeter with the teeth & leave a core with the attachment components intact. They need to work with the same shafts and spur gear adapter. I need the new gears to have the same attachment characteristics as the originals. STL files built in OpenSCAD, note the more aggressive, helical, teeth. The original gears, note the relatively shallow tooth depth: so relative shaft bore positions would match close enough to work). I fiddled with scale & tooth count to get the sum of their radius measures to approximate that of the two original gears (i.e. I bashed out a couple of helical gears, a spur (72T) and pinion (11T). The replacement gear was done in OpenSCAD using the gears library by Dr Jörg Janssen.

Openscad gear library free#

These were uploaded to (a free resource) & I got dimensions on the overall gear sizes from the on-screen ruler. I just grabbed a 96 tooth spur & 22 tooth pinion for the example. The original gears are from the MKULTRA design on cults3d ( )īy Lynxman. I could have matched it, more closely, but just did a quickie for this example) (BTW, in the process shown, the ratio is going to change from about 4:1 to about 6:1. In this case, let's say I have a gear set that I want to change to a heavier tooth profile. I thought I'd pass along an example of modifying an existing.