Re: Source for stepper dampers?
Dampers don't really need to be anything special as they're purely a functional item, most I've seen made by hobbyists are simply plastic circles with large ball bearings in the holes, and thin perspex on the sides to contain them. The commercial ones I have in my parts box use short metal rod in the 7-9 holes (from memory), and the whole unit is roughly 75-80% filled with a medium machince oil and sealed.
One thing of note which makes sense to me, is that the clamp assembly is fitted with a ball bearing, so when the the steppers stop or change direction, the inertia of the damper doesn't force an extra step or two. Depending on the speed and stepeprs used, this might be a handy design consideration.
cheers, Ian
It's rumoured that everytime someone buys a TB6560 based board, an engineer cries!