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 is added to the other side of the plate (red). My guess is that if it's just a rod in a through hole, it could potentially jam.
AFAIK, usually, in bigger setups, a linear bearing would come in handy. However, given that the plate is just 3MM thick, are there better ways to help alignment? Could making the edge around the through hole like the inside of a donut help? Something like
Is it easy to make? In fact, is my concern actually valid?
EDIT The centre area of the plate needs to be kept clear. This is intended to be part of a (~10MM thick) pole climber, where several guide rollers are fitted on the left side of the plate and a motor driven roller is on the left of the part (not depicted). So the idea is the press the guide roller against the pole until the two rollers have a good grip on the pole. The whole car is fairly light, so the force expected is around 30N.
Here's a more complete depiction:
The rollers are spring loaded, but they need to be released and retracted - and adjusted for different pole widths.