It is just a cut above a sliding block of wood. It can work but those in industry maintain a constant frusteration level with the issues.īTA Plasma wrote:Bearings on cold rolled steel is the cheapest way to get motion. Cold rolled steel is like the garage way of building a CNC platform. To get very good and great cuts that rival laser the cost goes up significantly when you enter the realnm of a profile rail. That being said is it good enough for plasma? The quest is to make the most accurate machine to allow the constantly changing arc angle its best shot at following a tool path. You can try to spec out this type of bar from a mill but the accuracy leave much to be desired until you machine or grind it. Once a ding or scratch is in a rail its there in the cut forever until you change out the cold rolled piece. The downfall is they require the challange of constant tweaking to maintain accuracy, always need to be wiped down and they constantly require lubrication and are easy to ding and scratch. The benefit is that the bearings and rails are cheap and easy to replace. Bearings on cold rolled steel is the cheapest way to get motion.
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