Rotary Motion to Lateral Motion Assembly

thingiverse

Designed this in TinkerCAD to convert rotary motion into lateral motion. At full size this build output ~4.5" of stroke. Movement is clean with little noise. I use SuperLube 52004 on the joints, but this is not really needed. Female end on Extension is a full 1mm wider than the male ends on either Secondary Arm or the Extension Arm. This is to allow room for glue/epoxy. I have found that CA glue works fine, but if you want epoxy there is room for it. Male end pin is 12mm diameter. Female Receiver is 13mm diameter. Motor Arm is designed to fit a 6mm shaft with a .5mm cutaway for a set screw. Motor arm should be printed at 100% infill Large holes in Motors Arm and Primary Arm are 8mm. Assembly pin is 8mm and a cutaway for the caps. Pins and caps should be printed at 100% infill. Caps have a 2.5mm hole for set screw or glue. M3 screws will not fit. Primary Arm should be printed with at least 50% infill. I have also designed a linear bearing to support the Secondary arm and any Extension you may want to add. All manner of parts and accessories can be designed to mount on the end of the Secondary arm or the Extensions. I currently have this hooked up to a cheap 12v DC motor from Amazon. This runs really smoothly at 60rpm, I have not tried faster as all my motors are 60rpm or slower. To support this build you will need to mount to a frame of some kind to hold it in the desired orientation. In my case, I built a frame from scrap plywood and some aluminum edging I had laying around. I have not tried this with a stepper motor yet, but that is the plan. I was hoping to use this like some kind of rudimentary actuator, but the sky is the limit. Have Fun!