Has anyone tips for keeping cumulative errors out of long racks cut using B&S type cutters. Or indeed any tips rack cutting period!
Mad as it may seem I want to cut two 8'6" (pitch not too crucial but about16 DP) racks - I have a Bridgeport vertical mill with a right angle head at my disposal that is fitted with a (cheapish) DRO of the cord round a drum variety (BW Electronics) - which seems quite repeatable but not necessarily accurate. I will do some tests with a set of standard length bars but I suspect that the DRO will introduce significant errors over a full span, and as the table is only 42" I will need to take three bites at the cherry anyway.
(As an alternative I also have a shaping head for the Bridgeport, which might prove more rigid than the r/a head)