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I have a 2D lidar mounted to a plate on a robot. I am looking for a method to adjust the pitch and roll of the plate so the plane of the laser is parallel to the ground.

Currently, I am using thin metal shims, but I want to find an easier method that will last. I was thinking about using set screws, but I've been told that it's a bad idea because they will inevitably come loose due to vibrations.

What other methods exist for adjusting the roll and pitch of a mounting plate? Are there any specially engineered solutions for this?

For reference, I'm using a Hokuyo 20Lx lidar. enter image description here

Klik
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2 Answers2

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You could order two large washers that are cut off a tapered plane, called beveled Washers. by rotating them over each other you get a level platform with ease. link

kamran
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A simple solution would be :

  • Two matching square plates with an M8 hole in each corner.

  • Sandwich a bit of moderately thick rubber, 10mm thick maybe, with matching holes between the two plates

  • arrange whatever mounting points you need for the lidar and vehicle in the top and bottom plates

  • Bolt through the holes with bolts any nyloc nuts

  • adjust the bolt tension to level the top plate, the rubber will take up the slack and

A slightly more sophisticated version is to drill a hole in the centre of the plates whcih you use to locate a ball bearing to act as a pivot point.

You could also drill through some (soft) ball bearings and use them as sort of spherical washers in conjunction with countersunk holes on the top plate to get better location for the bolt heads.

If you need a very large range of adjustment you could use something like this (made from modified pipe flanges) possibly substituting a bolt any nyloc for the Bristol lever, in fact with a smaller ball bearing (or no ball and a robber block or springs that is similar to what I described above. :

enter image description here

Chris Johns
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