# 12 ft. Top Bar, wall-mounted frame, Calibration issues **URL:** \ **Category:** Uncategorized\ **Tags:** calibration\ **Created:** [April 25, 2023, 7:40pm UTC](https://forums.maslowcnc.com/t/12-ft-top-bar-wall-mounted-frame-calibration-issues/18836 "2023-04-25T19:40:40Z")\ **Posts on this page:** 5\ **Page:** 2
**Author:** ![shintoz](https://avatars.discourse-cdn.com/v4/letter/s/a9adbd/32.png) [@shintoz](https://forums.maslowcnc.com/u/shintoz)\ **Post date:** [May 1, 2023, 10:52pm UTC](https://forums.maslowcnc.com/t/12-ft-top-bar-wall-mounted-frame-calibration-issues/18836/21 "2023-05-01T22:52:11Z")
![image](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/3X/3/d/3d19f91dfc55734ba7b6bfda14dfdd2797c0b896.jpeg) Much better ---
**Author:** ![shintoz](https://avatars.discourse-cdn.com/v4/letter/s/a9adbd/32.png) [@shintoz](https://forums.maslowcnc.com/u/shintoz)\ **Post date:** [May 2, 2023, 11:09pm UTC](https://forums.maslowcnc.com/t/12-ft-top-bar-wall-mounted-frame-calibration-issues/18836/22 "2023-05-02T23:09:48Z")
Question for knowledgeable FreeCAD cam users…. I can create 3D objects with shapestring text, by extruding them, but when trying to create a path/job, you can create a profile operation to cut out block lettering from wood, but dress up tags fail. If you are confused about what I mean, think of doing the opposite of what I have shown in the previous screenshots above… how do I cut the wood out around the letter… and not have the letter fall off the cutting surface mid-job? ---
**Author:** ![dlang](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/dlang/32/859_2.png) [@dlang](https://forums.maslowcnc.com/u/dlang)\ **Post date:** [May 3, 2023, 12:38am UTC](https://forums.maslowcnc.com/t/12-ft-top-bar-wall-mounted-frame-calibration-issues/18836/23 "2023-05-03T00:38:37Z")
two common answers to this. 1. leave tabs to hold it in place 2. leave a very thin layer of wood and then trim it off later (a flush trim bit in a trim router can clean up large edges really fast, lettering may be more of an issue) David Lang ---
**Author:** ![shintoz](https://avatars.discourse-cdn.com/v4/letter/s/a9adbd/32.png) [@shintoz](https://forums.maslowcnc.com/u/shintoz)\ **Post date:** [May 3, 2023, 1:22pm UTC](https://forums.maslowcnc.com/t/12-ft-top-bar-wall-mounted-frame-calibration-issues/18836/24 "2023-05-03T13:22:39Z")
But… you can’t leave tabs. You can’t convert extruded shapestrings to a solid object; I believe FreeCAD is evaluating those objects as “not touching” which makes sense…. and it seems the tag dressup may be evaluating them with a similar logic. The “thin layer” and flush trim bit seems like it may work, I can at least generate operations that appear to approach my intended final product, but that requires one or more pocket operations which is a big time sink… carving out all unneeded material in that 3D space rather than just the profile of the letters. It is a waste of the life of my bit, too. ---
**Author:** ![shintoz](https://avatars.discourse-cdn.com/v4/letter/s/a9adbd/32.png) [@shintoz](https://forums.maslowcnc.com/u/shintoz)\ **Post date:** [May 3, 2023, 11:08pm UTC](https://forums.maslowcnc.com/t/12-ft-top-bar-wall-mounted-frame-calibration-issues/18836/25 "2023-05-03T23:08:01Z")
Z issues, folks. Seems my Z spins a bit over what “calibrated” should be. Using 1/2 in ply, on my third pass, I’m in the waste board. [RQ2.nc](https://forums.maslowcnc.com/uploads/short-url/xpGcnkUM8jygfzpBb9YG6k2FOFR.nc) (6.1 KB) I checked my object; It’s definitely 1/2 inch. Anyone have Z settings for the Z unit that comes with the MakerMade jumpstart kit? [MakerMade Jumpstart Maslow CNC Kit - MakerMade](https://makermade.com/products/makermade-jumpstart-maslow-cnc-kit) GCODE attached above, if you wanna look. [Previous page](https://forums.maslowcnc.com/t/12-ft-top-bar-wall-mounted-frame-calibration-issues/18836.md?page=1)