Questions tagged [linear-bearing]

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1answer
32 views

Sliding system basic question

I have a basic question. Imagine a plate, with a hole drilled in each corner. Imagine 4 shafts in these 4 holes,attached to another plate. Intuition tells me that it would take considerable effort ...
-1
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6answers
806 views

CNC: Linear motion without timing belt or lead screw

Is it possible to build a CNC whose Linear motion system does not contain any timing belt(pulley) or lead screw(threaded rod). I was wondering whether I could directly control the Linear motion by ...
3
votes
5answers
712 views

Moving a small plate back and forth

I'm hoping to move a plate (3MM x 45MM) back and forth using a DC motor. Here's my idea so far: The motor drives a threaded shaft which is attached on one side of the plate. To help alignment, a rod ...
2
votes
1answer
244 views

Repairing non-lubricated linear actuator

I have a Chinese CNC mill (CNC3020T, though several different devices go under this name), and its Z axis was very imprecise, often being randomly off position by as much as 0.5mm. I've disassembled ...
1
vote
2answers
250 views

looking for a circular track and bearing with a spindle

I've really tried to find something online that's suitable but what I'm after is I've two concentric circular rings, one of which has a diameter about 10mm smaller than the larger . The rings ...
13
votes
5answers
31k views

How to convert vertical motion to horizontal

I am interested in using this miniature motor (Squiggle Micro Motor) to create very tiny horizontal movements. However, due to very limited space, I can only place it vertically within my project. ...
6
votes
1answer
434 views

Problem with vibrations in air bearing

We have an air bearing for a planar xy motion. Today it consists of four pockets according to picture. In the current design there are no sealings around the peripheries of the pockets and we ...
8
votes
2answers
1k views

What rail material is best used for linear bearings?

For the 3d printer RepRap Prusa there are several rails (smooth rods) that guide the printer head on the different axises. The printer head uses several linear bearings to glide along the rails. ...