index issue

[destroyer000]

had to cut some 3/8 plate last night 54x26 for a tractor bucket, i drew my part up in 2 layers. layer one was 40x26 and layer 2 was 14x26. my table is 4x4 so my first cut was layer one.. i stopped torch and moved my plate to my edge and jogged the -14 it cut where it pierced layer 1 and started on layer 2. after i was done my over all was short it came out to 53 5/8.... any idea why it came out short? i cut a smaller piece same in width and the same deal. i used draftsight sheet cam and mach 3

[weldguy]

Could be a number of things but I have had similar issues in the past and it was always as a result of me not starting the torch in the proper location for the 2nd half of the cut.

[motoguy]

Post your drawings and let us look at those. Either the drawing is off, the index was off, or the steps/motion of the table is off (unlikely if everything else is coming out to the correct size).