# Holey Triangular Calibration **URL:** \ **Category:** Technical Details\ **Created:** [August 29, 2018, 7:25pm UTC](https://forums.maslowcnc.com/t/holey-triangular-calibration/6240 "2018-08-29T19:25:54Z")\ **Posts on this page:** 1\ **Showing post:** 17
**Author:** ![madgrizzle](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/madgrizzle/32/1372_2.png) [@madgrizzle](https://forums.maslowcnc.com/u/madgrizzle)\ **Post date:** [August 30, 2018, 2:54pm UTC](https://forums.maslowcnc.com/t/holey-triangular-calibration/6240/17 "2018-08-30T14:54:25Z")
Using these adjustments, I fixed the motor spacing and fixed the rotational radius. I allowed the top beam to move around (left, right, up, down and tilt) and allowed chain sag and left and right chain tolerances to vary. I restricted the chain tolerances from going higher than 1.0 (in the way I calculate chain tolerance, a number higher than 1.0 suggests the chains are shorter than they should be… which is not logical) The results are encouraging in that it at least it minimized error value… Error Magnitude: 0.809 Motor Spacing: 3602.6 (what I measured by hand… this was fixed) Rotation Radius: 139.1 (what I believe it to be… this was fixed) Chain Sag Correction: 28.023907 Left Chain: 0.994409 Right Chain: 0.997864 Left Motor X,Y: -1800.6534, -1082.749 Right Motor X,Y: 1801.9455, -1085.525 (this means right motor about 3 mm higher than left) Left Chain Error Hole 1: -0.985 Left Chain Error Hole 2: 0.9938 Left Chain Error Hole 3: -0.9462 Left Chain Error Hole 4: 0.8875 Right Chain Error Hole 1: -0.7822 Right Chain Error Hole 2: 0.8981 Right Chain Error Hole 3: 0.0702 Right Chain Error Hole 4: -0.4148 --- _[View the full topic](https://forums.maslowcnc.com/t/holey-triangular-calibration/6240)._