# My dog holes are too small **URL:** \ **Category:** Off Topic\ **Created:** [May 14, 2026, 4:25pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707 "2026-05-14T16:25:55Z")\ **Posts on this page:** 17\ **Page:** 1
**Author:** ![HardtailSr](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/hardtailsr/32/35326_2.png) [@HardtailSr](https://forum.onefinitycnc.com/u/HardtailSr)\ **Post date:** [May 14, 2026, 4:25pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/1 "2026-05-14T16:25:55Z")
I am trying to make dog holes on my spoil board. I am using a 1/2 endmill. Yes, I checked it and itis within .001. I am asking the gen two machine using victrices Vcarve pro to do a pocket hole of .750 but they come out at .742-.743 my material for the dog fence is .752 I made sure the holes are saved using the journeyman redline inch post processor. Any ideas? ---
**Author:** ![SailorMike](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/sailormike/32/3290_2.png) [@SailorMike](https://forum.onefinitycnc.com/u/SailorMike)\ **Post date:** [May 14, 2026, 5:39pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/2 "2026-05-14T17:39:40Z")
Kind of a long shot, I know, but assuming you are using a pocket toolpath, make sure that you haven’t got an offset selected. ---
**Author:** ![HardtailSr](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/hardtailsr/32/35326_2.png) [@HardtailSr](https://forum.onefinitycnc.com/u/HardtailSr)\ **Post date:** [May 14, 2026, 5:55pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/3 "2026-05-14T17:55:18Z")
nope no offset selected. ---
**Author:** ![TMToronto](https://avatars.discourse-cdn.com/v4/letter/t/7ea924/32.png) [@TMToronto](https://forum.onefinitycnc.com/u/TMToronto)\ **Post date:** [May 14, 2026, 6:36pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/4 "2026-05-14T18:36:28Z")
A few thoughts… 1. Are the holes round or (slightly) oval? 2. Are the pocket walls vertical/plumb? 3. Are you adding a final spring pass? 4. Have you tried a smaller endmill (1/4") with stepovers/multiple DOCs? 5. Have you ever calibrated your axes (i.e., does an MDI X = 600 mm move the spindle exactly 600 mm)? 6. I believe you checked for a ‘stock to leave/offset’ ---
**Author:** ![Derf](https://avatars.discourse-cdn.com/v4/letter/d/76d3ee/32.png) [@Derf](https://forum.onefinitycnc.com/u/Derf)\ **Post date:** [May 14, 2026, 7:24pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/5 "2026-05-14T19:24:03Z")
Recalculate the tool path and lie about the tool size to make up the difference. ---
**Author:** ![TommyObar](https://avatars.discourse-cdn.com/v4/letter/t/bcef8e/32.png) [@TommyObar](https://forum.onefinitycnc.com/u/TommyObar)\ **Post date:** [May 14, 2026, 10:25pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/6 "2026-05-14T22:25:27Z")
Make sure you are using a conventional (not climb) cut. The climb pushes away from the material resulting in slightly smaller holes. ---
**Author:** ![HardtailSr](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/hardtailsr/32/35326_2.png) [@HardtailSr](https://forum.onefinitycnc.com/u/HardtailSr)\ **Post date:** [May 14, 2026, 11:03pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/7 "2026-05-14T23:03:11Z")
well i simply told it i want .760 and i got what i needed. now the are a tight fit to the round stock i am using for a fence. .752 hdpe. ---
**Author:** ![MikeXYZ](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/mikexyz/32/32034_2.png) [@MikeXYZ](https://forum.onefinitycnc.com/u/MikeXYZ)\ **Post date:** [May 15, 2026, 10:24pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/8 "2026-05-15T22:24:40Z")
My gut tells me deflection is your problem. When your CAD model is 0.75" diameter, the tool may cut a smaller diameter because of deflection. The tool deflects, the spindle and machine deflect a bit, and the material may be pushed away from the cutter slightly… all normal in CNC machining. It’s pretty common to overshoot the target and try to land on the desired dimension. To understand if deflection is your problem, try pocketing the hole, then repeat the same toolpath again. If the second toolpath cuts new material, you can be pretty confident the tool was deflecting in the first cut. This is known as a “Spring Pass” - because the tool springs back to it’s natural location when not loaded. Also could be a worn cutter… ---
**Author:** ![HardtailSr](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/hardtailsr/32/35326_2.png) [@HardtailSr](https://forum.onefinitycnc.com/u/HardtailSr)\ **Post date:** [May 15, 2026, 11:12pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/9 "2026-05-15T23:12:26Z")
first off, it was a half inch end mill cutter, brand new. and it was not deflection because as I had to tell redline and onefinity, the machine stopped four times forcing me to rerun the program four times from the beginning, and the holes were the same before and after. the first four holes were run four times with no change in hole size. the cutter was within one thousandth of an inch from true .500 but with the way this machine has been having problems. I am beginning to doubt that I will even be keeping this thing much longer. I am just glad I kept my Masso. I have run literally thousands of programs with barely any trouble at all; except ones I caused lol. ---
**Author:** ![PezWoodworks](https://avatars.discourse-cdn.com/v4/letter/p/ea5d25/32.png) [@PezWoodworks](https://forum.onefinitycnc.com/u/PezWoodworks)\ **Post date:** [May 16, 2026, 12:37pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/10 "2026-05-16T12:37:01Z")
I think the term deflection just used universally for the bit moving over under pressure, carbide bits don’t bend, they break, the 1F machine is just not that rigid, put a dial indicator on the bit and push, with very little effort it will “deflect” several thousands . I have had my Masso machine for several years now and get fantastic results knowing the limitations of the machine. ---
**Author:** ![JimHatch](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/jimhatch/32/3928_2.png) [@JimHatch](https://forum.onefinitycnc.com/u/JimHatch)\ **Post date:** [May 16, 2026, 2:56pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/11 "2026-05-16T14:56:48Z")
> [@HardtailSr](#): > > I am beginning to doubt that I will even be keeping this thing much longer. You looking at an Altmill or something else? ---
**Author:** ![Diesel\_ss](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/diesel_ss/32/29544_2.png) [@Diesel\_ss](https://forum.onefinitycnc.com/u/Diesel_ss)\ **Post date:** [May 16, 2026, 4:24pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/12 "2026-05-16T16:24:39Z")
Whats the measure in vectric? And as said climb or cornventual? Pocket or profile? ---
**Author:** ![HardtailSr](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/hardtailsr/32/35326_2.png) [@HardtailSr](https://forum.onefinitycnc.com/u/HardtailSr)\ **Post date:** [May 16, 2026, 7:16pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/13 "2026-05-16T19:16:13Z")
Jim right now I am in a sort of holding pattern. I’ve spent too much already to put any more money into a new acquisition and too much to give up and lose this damn thing. I am really really hoping the new grounded HMI will work. In the meantime just to do “something” i am purchasing these. [Amazon.com: Tamicy 60 Pieces Clip-on Ferrite Ring Core RFI EMI Noise Suppressor Cable Clip for 3mm/ 5mm/ 7mm/ 9mm/ 13mm Diameter/Video Cable Power Cord (Black) : Industrial & Scientific](https://www.amazon.com/dp/B08BPHCXR3?tag=benmyers-20) I am going to put these little “f ers” on every cable and cord I have in the shop LOL ---
**Author:** ![SailorMike](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/sailormike/32/3290_2.png) [@SailorMike](https://forum.onefinitycnc.com/u/SailorMike)\ **Post date:** [May 16, 2026, 8:06pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/14 "2026-05-16T20:06:13Z")
I bought those, originally for my Machinist with the BB controller, and they worked well. ---
**Author:** ![YXYJack](https://avatars.discourse-cdn.com/v4/letter/y/c67d28/32.png) [@YXYJack](https://forum.onefinitycnc.com/u/YXYJack)\ **Post date:** [May 20, 2026, 7:50pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/15 "2026-05-20T19:50:51Z")
Might be moot at this point, but in these situations where it’s a repeatable error after rechecking the basic settings – like it sounds like you’ve already done – I’ll go in and look at the G code output itself through something like NCviewer. If the G code is set to create .75 holes, then you know the issue is downstream of your CAM and sender. -Mark ---
**Author:** ![TommyObar](https://avatars.discourse-cdn.com/v4/letter/t/bcef8e/32.png) [@TommyObar](https://forum.onefinitycnc.com/u/TommyObar)\ **Post date:** [May 22, 2026, 3:43pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/16 "2026-05-22T15:43:18Z")
Every time I scroll and see this topic, I think “get smaller dogs”. 😁 ---
**Author:** ![HardtailSr](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/hardtailsr/32/35326_2.png) [@HardtailSr](https://forum.onefinitycnc.com/u/HardtailSr)\ **Post date:** [May 22, 2026, 5:11pm UTC](https://forum.onefinitycnc.com/t/my-dog-holes-are-too-small/38707/17 "2026-05-22T17:11:48Z")
LOL good one tommy. what I really did was ask for .765 holes to get an actual .752 hole. 13 thousandths bigger than what the dimensions I requested. the end mill was brand new and withing one thou of true.750 I still have not found a good answer to this problem.