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schlotzz, i dont have the still to use opens cad. can you make me a BIGGGGG favor and probably other guys, and make this for filament of 3mm.im using the following drive gear

http://i.ebayimg.com/00/s/NjAwWDYwMA==/z/lYEAAMXQrhdTWVbE/$_12.JPG

I Have just installed openscad . i did find the parameters. i will be uploading the version with my gear drive.

THis are the parameters that i need to update with the size of my gear

// drive gear
drive_gear_outer_radius = 8.00 / 2;
drive_gear_hobbed_radius = 6.35 / 2;
drive_gear_hobbed_offset = 3.2;
drive_gear_length = 13 + 0;
drive_gear_tooth_depth = .2;

This is the one that i allready updated with the 3mm filament
//// filament
filament_diameter = 3.00; // 1.75, 3.00