Martinm
Member
I'd like to make a herringbone gear like this: http://www.welter-zahnrad.de/wp-content/uploads/WELTER-Pfeilverzahnung.jpg
Application is a 3D printed microscope focusing rack (like this one https://www.amazon.ca/KOPPACE-Microscope-Focusing-Accuracy-Aperture/dp/B07MDGSF76). So it need not be geometrically perfect, just good enough. I already have the linear part and am now struggling with the gear.
The idea was: Use the gear generator python script to generate a 20 tooth gear sketch (20 mm pitch diameter) and make a twisted extrusion, rotating the profile by one tooth (360°/20). How do I do this?
Using a loft, I'd probably have to split the 18° twist in several steps, making several sketches (on offset planes) rotated by like 6° each, but I'd say this does not give a geometrically correct result (not that it would matter) and seems quite unelegant.
Somewhere in this forum I found an example of a helical boss with profile direction (advanced) set to normal. However I can't get this to work and documentation is zero here.
So what would you recommend? (Of course I could use a "straight" gear. But what would be the fun in that?)
Regards, Martin
Application is a 3D printed microscope focusing rack (like this one https://www.amazon.ca/KOPPACE-Microscope-Focusing-Accuracy-Aperture/dp/B07MDGSF76). So it need not be geometrically perfect, just good enough. I already have the linear part and am now struggling with the gear.
The idea was: Use the gear generator python script to generate a 20 tooth gear sketch (20 mm pitch diameter) and make a twisted extrusion, rotating the profile by one tooth (360°/20). How do I do this?
Using a loft, I'd probably have to split the 18° twist in several steps, making several sketches (on offset planes) rotated by like 6° each, but I'd say this does not give a geometrically correct result (not that it would matter) and seems quite unelegant.
Somewhere in this forum I found an example of a helical boss with profile direction (advanced) set to normal. However I can't get this to work and documentation is zero here.
So what would you recommend? (Of course I could use a "straight" gear. But what would be the fun in that?)
Regards, Martin