# Offset cutting and consideration after X and Z-Axis stiffening mod and Eccentrinc nut mod **URL:** \ **Category:** Troubleshooting\ **Created:** [April 15, 2016, 8:48pm UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530 "2016-04-15T20:48:04Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![AlexFelix](https://avatars.discourse-cdn.com/v4/letter/a/5e9695/32.png) [@AlexFelix](https://community.inventables.com/u/AlexFelix)\ **Post date:** [April 15, 2016, 8:48pm UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530/1 "2016-04-15T20:48:04Z")
Hello, today I had the time to make a test cust after the simply mod to the eccentric nut and X/Z stiffening mod. You can find them here if you want to check: - [Phil Johnson Build - #14](https://community.inventables.com/t/phil-johnson-build/19958/14) (Eccentric nut) - [A mod to make z-azix more stiff and easier to adjust](https://community.inventables.com/t/a-mod-to-make-z-azix-more-stiff-and-easier-to-adjust/15925) (Z Axis mod) - [A 30 minute x-axis mod to reduce chatter](https://community.inventables.com/t/a-30-minute-x-axis-mod-to-reduce-chatter/15775) (X Axis stiffening) Anyway, today I did a test cut of a guitar template, really simply design on MDF (a Telecaster to be more specific) and in some point the cut, after the first pass, is a bit offset (of a 1mm pretty much). But only in some point. So I checked all the eccentric nut and they where ok. Not loose and not too tight. The wiring was ok. No short or whatever. To be honest I noticed (after the cut) that a screw of the right stepper pulley were missing so I’m going to replace it tomorrow. Belt tension seems ok to me, but I haven’t setted it with a method, just tightened until they appeared ok. All the axis move nice with just a little effort (with hand). The X-Axis have little to nothing chatter, the Z-Axis the same. Y-Axis could be a little bit more rigid so I’m planning an upgrade in the future. I also planned to make the stepper calibration (not the pot current, I have made it) when I find a solid method to make it. But, for the moment, I can’t make a decent cut, even after everything seems correctly assembled. Any thought? Alex ---
**Author:** ![AlexFelix](https://avatars.discourse-cdn.com/v4/letter/a/5e9695/32.png) [@AlexFelix](https://community.inventables.com/u/AlexFelix)\ **Post date:** [April 15, 2016, 8:55pm UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530/3 "2016-04-15T20:55:39Z")
Hello! I need to put Loctite ALSO into the pulley screws!? I tried today to see how much accurate the machine is, just by clamping a rule and move the machine first with short move, later with long move. On short move seem to be precise, but in the long I noticed a ‘offset’ (don’t know how to call) of little less than a millimeter. ---
**Author:** ![AlexFelix](https://avatars.discourse-cdn.com/v4/letter/a/5e9695/32.png) [@AlexFelix](https://community.inventables.com/u/AlexFelix)\ **Post date:** [April 15, 2016, 8:56pm UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530/4 "2016-04-15T20:56:54Z")
I’m just wondering if is possible that the machine is not square… ---
**Author:** ![AlexFelix](https://avatars.discourse-cdn.com/v4/letter/a/5e9695/32.png) [@AlexFelix](https://community.inventables.com/u/AlexFelix)\ **Post date:** [April 15, 2016, 9:00pm UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530/6 "2016-04-15T21:00:10Z")
Ok so I need to do that. I wanted to avoid it if was possibile but seem that I have no choice. Anyway, do you have some tips on how to check if the machine is square? ---
**Author:** ![AlexFelix](https://avatars.discourse-cdn.com/v4/letter/a/5e9695/32.png) [@AlexFelix](https://community.inventables.com/u/AlexFelix)\ **Post date:** [April 15, 2016, 9:10pm UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530/8 "2016-04-15T21:10:10Z")
Mmm reading this I put my bid on the machine not square ---
**Author:** ![AlexFelix](https://avatars.discourse-cdn.com/v4/letter/a/5e9695/32.png) [@AlexFelix](https://community.inventables.com/u/AlexFelix)\ **Post date:** [April 15, 2016, 9:17pm UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530/10 "2016-04-15T21:17:55Z")
Ahaha pretty much. I took a week to assemble it, but I’m honest: When I was near the end, I rushed just a little! ---
**Author:** ![AlexFelix](https://avatars.discourse-cdn.com/v4/letter/a/5e9695/32.png) [@AlexFelix](https://community.inventables.com/u/AlexFelix)\ **Post date:** [April 15, 2016, 9:23pm UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530/12 "2016-04-15T21:23:26Z")
Mmm I guess you’re right, I need to think a little about it tomorrow. Thought I was planning to disassemble the whole machine later this year, but since I can’t make a decent cut since when I had it, I guess is better the check everything again. EDIT: I wanted to disassemble it just to make a better wiring, nothing more. ---
**Author:** ![Johnny](https://avatars.discourse-cdn.com/v4/letter/j/ecb155/32.png) [@Johnny](https://community.inventables.com/u/Johnny)\ **Post date:** [April 25, 2016, 1:28pm UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530/13 "2016-04-25T13:28:15Z")
Did you have any luck finding the culprit for the offset cut? ---
**Author:** ![AlexFelix](https://avatars.discourse-cdn.com/v4/letter/a/5e9695/32.png) [@AlexFelix](https://community.inventables.com/u/AlexFelix)\ **Post date:** [April 26, 2016, 8:48am UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530/14 "2016-04-26T08:48:32Z")
Hello, honestly I haven’t had the time to make a new setup, maybe today. What I believe pretty much is that I have mounted the machine on the wasteboard/extrusion and let it ‘flex’. If you pay attention to the 2 Y rails, when you screw them to the wastboard, they tend to ‘flex/bend’, I guess this is the cause of my offset cut in the upper position of the machine. Or at least I REALLY hope is this becasuse I have the machine by 2 month and never cutted something good. Apart some small things. Al ---
**Author:** ![AlexFelix](https://avatars.discourse-cdn.com/v4/letter/a/5e9695/32.png) [@AlexFelix](https://community.inventables.com/u/AlexFelix)\ **Post date:** [April 26, 2016, 11:49am UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530/16 "2016-04-26T11:49:32Z")
Mmm I don’t remember how I have assembled my waste board but for sure I can say “in the bad way” because I was missing some parts (as some screw, some t-slot nut etc), so I really hope that re-doing the waste board assembly will solve my issue ---
**Author:** ![AlexFelix](https://avatars.discourse-cdn.com/v4/letter/a/5e9695/32.png) [@AlexFelix](https://community.inventables.com/u/AlexFelix)\ **Post date:** [April 26, 2016, 6:32pm UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530/18 "2016-04-26T18:32:35Z")
I just unscrewed the 8 screw on the Y plate and to me seem that the machine have ‘found’ its own allignment. Could be possibile? Or is better to re-assemble the waste board anyway? ---
**Author:** ![AlexFelix](https://avatars.discourse-cdn.com/v4/letter/a/5e9695/32.png) [@AlexFelix](https://community.inventables.com/u/AlexFelix)\ **Post date:** [April 26, 2016, 7:51pm UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530/20 "2016-04-26T19:51:12Z")
You’re right, better to check everything and be sure than just to try and see how it go. I’ll disassemble the waste board tomorrow ---
**Author:** ![AlexFelix](https://avatars.discourse-cdn.com/v4/letter/a/5e9695/32.png) [@AlexFelix](https://community.inventables.com/u/AlexFelix)\ **Post date:** [April 27, 2016, 2:37pm UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530/21 "2016-04-27T14:37:06Z")
Ok, I don’t want to burn myself but seem that a change of bit have solved my problem… ---
**Author:** ![AlexFelix](https://avatars.discourse-cdn.com/v4/letter/a/5e9695/32.png) [@AlexFelix](https://community.inventables.com/u/AlexFelix)\ **Post date:** [April 27, 2016, 9:32pm UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530/23 "2016-04-27T21:32:40Z")
New bit made in ‘widia’, and this is the result. Perfect by a fraction of mm. (for reference a pocket should be 80,66mm and is 80.67/68, I guess really ok) ![](https://canada1.discourse-cdn.com/flex009/uploads/inventables/original/3X/3/2/32e75e494699c152e8c71afd644aae8c7982166d.jpg) ---
**Author:** ![AlexFelix](https://avatars.discourse-cdn.com/v4/letter/a/5e9695/32.png) [@AlexFelix](https://community.inventables.com/u/AlexFelix)\ **Post date:** [April 27, 2016, 10:17pm UTC](https://community.inventables.com/t/offset-cutting-and-consideration-after-x-and-z-axis-stiffening-mod-and-eccentrinc-nut-mod/22530/25 "2016-04-27T22:17:55Z")
Sure! I’ll make more test tomorrow, but as is work fine for me. For sure I can make some calibration after some other work I really have to do