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I need to find a linear actuator that can extend to multiple times it's length. I am going to be fixing the actuator horizontally and it will carry a light vertical load.

So far I have thought of using something similar to the mechanism in a scissor lift. However, this is intended for a CNC application and needs high precision, and I'm not sure a scissor lift design would be rigid enough vertically when place horizontal. The system will eventually be feedback controlled so some give can be tolerated.

Is there something other than a scissor lift design that would be better suited to this application?

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  • $\begingroup$ Can you not use a ball screw actuator? $\endgroup$ – SteveO Sep 9 '17 at 8:54
  • $\begingroup$ Welcome to Robotics TimTheEnchanter, but I'm afraid that Unbounded Design Questions are off-topic because there are many ways to solve any given design problem. We prefer practical, answerable questions based on actual problems that you face, so questions which ask for a list of approaches or a subjective recommendation on a method (for how to build something, how to accomplish something, what something is capable of, etc.) are off-topic. Please take a look at How to Ask & tour for more information on how stack exchange works. $\endgroup$ – Chuck Oct 10 '17 at 18:13
  • $\begingroup$ You said, "intended for a CNC application and needs high precision, and I'm not sure a scissor design would be rigid enough." You then immediately say, "some give can be tolerated." Pick one. What is your tolerance? You can have some give in what dimension? I can Google "telescoping linear actuator" and find results. I don't understand how those aren't useful to you. Ultimately, though, you appear to have a set of requirements and seem to want help designing a solution. You're more than welcome to join us in Robotics Chat and ask, but those questions are off-topic for the site. $\endgroup$ – Chuck Oct 10 '17 at 18:16
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You could use a linear motor like this one we use on our wheelchair(to push the seat up):

https://youtu.be/3lb_8nmy90c

Thouse motors are calles lamba motors and are made from phoenix mecano.

The have smaller and bigger one, the new version of the wheelchair has 1 stronger one.

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  • $\begingroup$ It appears that the actuators used in the video are the standard type that only extend to twice their length. I need a specialized actuator that can extend to many times it's length. $\endgroup$ – nshoo Jun 12 '17 at 15:48

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