Hello,
I’m in urgent need of help. For a prototype I am looking for a linear motor for an approx. 5-10 cm long lifting movement, speed adjustable.
I found 2 videos showing exactly what I am looking for (Makeblock preferred, otherwise Lego technics):
https://www.youtube.com/watch?v=q5b-uP05ELA&t=5s=q5b-uP05ELA&t=5s Position 1:11 in the video
or
https://www.youtube.com/watch?v=PhfiduEUaVA=PhfiduEUaVA Position 0:18 on video
However, I don’t want to constantly make a switch for the off/down movement, but this should continue to run automatically.
I also saw in a video that you can control the speed with a mobile app?
Sorry my bad Englisch. I use Translator.
Hello @feuerland, and welcome to the forum!
Please have a look at these two options:
For the first option, you would need to buy a motor + motor mount, but you would get good quality assembly with a lot of flexibility (for mounting). Stroke is up to 7.4 inches (around 18 cm) and you could control speed.
The other option is cheaper, but with some additional mountings, it could do your work.
Thank you for both your suggestions.
But they are much too complicated and too expensive.
With your 2nd suggestion the bar turns. But that must not be. I only need an up and down movement. No rotary movement.
Do you want a screw, tooth and piston based solution? The screw based solutions that were suggested by @igor_X the motor housing stays in one place and turns around the threaded rod which causes the rod to either extend or retract.
I think what @feuerland is looking for is a cheap rack and pinion, I couldn’t find any from Makeblock or Lego technics but I found these from Vex Robotics:
https://www.robotshop.com/en/vex-iq-gear-kit.html
https://www.robotshop.com/en/vex-robotics-advanced-gear-kit.html
With the last one and this you could create something like this:
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