A lot of times when making sheet metal parts setup for laser and cnc brake, or tube laser cut parts – my total roll out value or flat pattern dimension does not come close to the actual sheet size I need for converting the part into a flat *.dwg. Why is this? For example… if I flatten out the image below I may measure short on the actual sheet size needed to phyically make the part. I’ve adjusted k-factor, physical properties and sheet thickness to compensate but I can’t seem to get any consistency to the rollout/flat pattern.
I’m using SW 2011