# 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:** 226
**Author:** ![c0depr1sm](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/c0depr1sm/32/9614_2.png) [@c0depr1sm](https://forums.maslowcnc.com/u/c0depr1sm)\ **Post date:** [February 3, 2019, 8:01pm UTC](https://forums.maslowcnc.com/t/holey-triangular-calibration/6240/226 "2019-02-03T20:01:39Z")
Hi Jimr, There is a little context here we might need: Did you modify your settings with values according to calibration outcome then observe this problem as a consequence? If so, then I responded here: > [@Sled will not go to top of board same parts are cut different sizes](https://forums.maslowcnc.com/t/sled-will-not-go-to-top-of-board-same-parts-are-cut-different-sizes/8646/8): > > Hi Jimr, I reviewed your last posts on this topic as well as the Holey Calibration Topic. This is the kind of situation where we have a chance to share about what is going on in the arduino, and name new places to recognize the situation. For the context, here is what makes the arduino complain about not finding positions error: The arduino keeps in memory the amount of chain that is extended above the sprocket 12 O Clock position. At power up, it reloads the last values saved in the EEPROM. … --- _[View the full topic](https://forums.maslowcnc.com/t/holey-triangular-calibration/6240)._