Eliminating Arm Wobble

[apalrd]

In the past, when we have been worried about lash on arms, we have intentionally increased the moving friction of the arm to keep it stable, and spring loaded the arm one way to force it to stay on the same side of the lash whenever possible.

For example, last year we pressed the arm axle into a block of delrin with an on-size hole to make our bearing. The delrin was slick enough for the axle to slide, but also had quite a bit of friction. We also sprung the arm up with surgical tubing to keep it on the same side of the lash in most cases.