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MechEngineerMike

3D Printed High Load Linear Actuator

by MechEngineerMike May 3, 2015
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how fast can this travel the 5inch distance

Must be my lucky day. I was looking over the linear actuator options for a heliostat I had in mind and happened to stumble across this thing. Could be just the ticket. Thanks!

A sun tracking frame would be a great application for this design, good luck!

I was looking for something to automate my foot pedal operated trolling motor for remote control and this look like it may do the trick. In fact it may be overkill

Great design Mike!

Do you have problems keeping the thread lubricated?

Thanks bath! Well yes and no, I used a heavy grease and considering how this is used in practice its just not making very many cycles, so I don't worry about the lube. On the other hand, you would have to take it all apart if you wanted to reapply the grease.

What's the FOS on this at 300 lbs? Looks great keep up the good work!

I'm really struggling to figure out what FOS means in this context, ha ha. I'm glad you like it though!

Sorry, my design of machine elements professor is a bit different I have been finding. I meant factor of safety for the parts. They look pretty robust, but I was astounded when I saw that you mentioned 300lbs!

Oh of course! Yes FOS is an acceptable acronym, I don't know why that stumped me. In any case the safety factor is 1 at 300 lbs, ha ha. At that point the limiting factor is presumed to be the torque of the stepper motor. My TestrBot machine has a load cell with a 200 lb capacity, so normal operation never exceeds a safety factor of 1.5.

Wow that is pretty stout, I wonder what kind of numbers I could get out of this by gearing it down more. May be a fun little project for this summer. :) I voted for your TestrBot on Instructables by the way. I have been following your blog for quite some time now and I really enjoy reading about your projects keep up the good work!

Thanks a lot, that's really encouraging!

Congratulations by the way for getting featured on instructables!