Had something odd happen last night where the z-zero changed somehow during the cut. I have a sbp file (part I drew in Fusion360 and wrote out using the HB post processor). When I was using the 1/4" spiral upcut bit it was cutting through the material but when I switched to a straight flute 1/4" bit an ran the same file it did not cut through the material. I did re-zero out the top after the bit change and verified that both a setting of Z=0.75" was 0.75" above the surface and then Z=0 was just touching the surface. The chucked bits the spiral upcut is about 0.25" longer than the other and it is also possible the sprial upcut is changing zero as well just not as noticeable (never checked it because it was doing what I needed). Tested and reset it many times assuming that I didn't zero it or was user error. Always the same result (z-zero is higher after the cut). I am going to simplify it tonight for testing and have it drill a simple hole and see if that works. But figured I would ask in case anyone knows what is going on. :)https://handibot.com/forum/read.php?2,3292,3292#msg-3292Tue, 15 Sep 2026 14:04:58 -0400 Phorum 5.2.22 https://handibot.com/forum/read.php?2,3292,3300#msg-3300 https://handibot.com/forum/read.php?2,3292,3300#msg-3300 Brian Owen, ShopBot Handibot ForumSun, 09 Dec 2018 21:34:08 -0500 https://handibot.com/forum/read.php?2,3292,3294#msg-3294 https://handibot.com/forum/read.php?2,3292,3294#msg-3294
Then it dawned on me that a “verify” button on the job run would be very useful. The preview knows all of the x,y, and z coordinates from the file so that could check against the bit offset and give me a green go or red stop.]]> Curtis Handibot ForumWed, 05 Dec 2018 18:58:58 -0500 https://handibot.com/forum/read.php?2,3292,3293#msg-3293 https://handibot.com/forum/read.php?2,3292,3293#msg-3293
Brian]]> Brian Owen, ShopBot Handibot ForumMon, 03 Dec 2018 09:57:34 -0500 https://handibot.com/forum/read.php?2,3292,3292#msg-3292 https://handibot.com/forum/read.php?2,3292,3292#msg-3292
I have a sbp file (part I drew in Fusion360 and wrote out using the HB post processor). When I was using the 1/4" spiral upcut bit it was cutting through the material but when I switched to a straight flute 1/4" bit an ran the same file it did not cut through the material. I did re-zero out the top after the bit change and verified that both a setting of Z=0.75" was 0.75" above the surface and then Z=0 was just touching the surface.

The chucked bits the spiral upcut is about 0.25" longer than the other and it is also possible the sprial upcut is changing zero as well just not as noticeable (never checked it because it was doing what I needed).

Tested and reset it many times assuming that I didn't zero it or was user error. Always the same result (z-zero is higher after the cut).

I am going to simplify it tonight for testing and have it drill a simple hole and see if that works. But figured I would ask in case anyone knows what is going on. :)]]> Curtis Handibot ForumMon, 03 Dec 2018 09:19:37 -0500