The HDPE slide pads are an excellent idea, and well worth using regardless of how you make the system.
I'd stick with stainless steel for the rails and such. Aluminum depends on an oxide coating to prevent further corrosion damage, and the sliding motor mounts would keep damaging the oxide coating, leading to increased corrosion of the aluminum rails. Also, stainless steel is stronger, so the rails can be smaller. Finally, stainless steel has better fatigue characteristics than does aluminum.
Originally Posted by Greenman
So it would be best to stick with the HDPE slide pads?
What about aluminum construction? Or would there be too much issue with dissimilar metals etc (stainless fasteners)?
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