# Cut parts are slightly skewed. Next troubleshooting steps? **URL:** \ **Category:** Troubleshooting\ **Tags:** accuracy, calibration\ **Created:** [May 28, 2025, 6:40pm UTC](https://forums.maslowcnc.com/t/cut-parts-are-slightly-skewed-next-troubleshooting-steps/24236 "2025-05-28T18:40:26Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![gwhitaker](https://avatars.discourse-cdn.com/v4/letter/g/a698b9/32.png) [@gwhitaker](https://forums.maslowcnc.com/u/gwhitaker)\ **Post date:** [May 28, 2025, 6:40pm UTC](https://forums.maslowcnc.com/t/cut-parts-are-slightly-skewed-next-troubleshooting-steps/24236/1 "2025-05-28T18:40:26Z")
Hi all. First post here. I am running a brand new Maslow 4.1, using a vertical 8x10 frame, with a 4’x4’ workpiece. I have been able to calibrate successfully and make several cuts that look great and are very consistent but are “skewed” a bit long in the x direction and short in the y direction. I’ve attached a picture of the parts, which are supposed to be circles! ![CircleParts](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/3X/7/a/7aafc31fe72c2b8011addf2868e9d026a153b9db.jpeg) My lower circle was off by +3.5% in x axis and -4.5% in the y axis. My upper circle was off by the same in the x-axis but -3.2% in the y axis. The right angles on that rectangle are also bang-on square compared to themselves and to the base of the plywood. There was some wonkiness along the top edge but based on the frame size checker, that should be expected. What should my next troubleshooting steps be? I’ve heard talk of manual calibration being better but couldn’t find much info on how to perform that process on the newer Maslow. Could there be other confounding factors? ---
**Author:** ![bar](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/bar/32/10_2.png) [@bar](https://forums.maslowcnc.com/u/bar)\ **Post date:** [May 28, 2025, 8:33pm UTC](https://forums.maslowcnc.com/t/cut-parts-are-slightly-skewed-next-troubleshooting-steps/24236/2 "2025-05-28T20:33:21Z")
Woah yeah those are very skewed! I would start by just running the vanilla calibration process again. It should take the results from before as a starting point and improve on them hopefully giving you better results. You can also in the settings manually correct for some X and Y scaling, but this seems too far off for that yet. Manual calibration just means measuring the exact coordinates of your anchor points by hand and entering them in the settings. Some folks have reported great results doing that, but I haven’t personally had it work well (I guess I’m just bad a measuring 😔 ) ---
**Author:** ![wsmagee](https://avatars.discourse-cdn.com/v4/letter/w/9d8465/32.png) [@wsmagee](https://forums.maslowcnc.com/u/wsmagee)\ **Post date:** [July 19, 2025, 5:56pm UTC](https://forums.maslowcnc.com/t/cut-parts-are-slightly-skewed-next-troubleshooting-steps/24236/3 "2025-07-19T17:56:03Z")
@gwhitaker did you get your issue resolved? If so curious what you found/did. @bar I am having this exact same problem, and wondering next troubleshooting steps as well.(I have run calibration three times) My frame is made out of 2x4" lumber bolted together with a 1/4" plywood screwed at corners. The mount pins are 91"Tall and 132"wide. Then a piece of 4’x8’ pink foam as sacrificial layer. It’s not without flex, but the flex is not in direction that the belts really pull. It’s seems quite stiff in those directions. ![MaslowFrameSetup](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/3X/4/0/404c41c85fa0613b8f30079fd1c572a4df4e1098.jpeg) I have calibrated three times and still not getting Round circles or Square squares. Here are my test cuts and results (in Inches): | Calibration | Shape | X (Width) | X (Width) | Y (Height) | Y (Height) | | X% | Y% | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | | | Intended | Actual | Intended | Actual | | | | | First Calibration | Circle 1 | 6 | 6.1875 | 6 | 5.5625 | | 3.1% | -7.3% | | First Calibration | Square 1 | 10 | 10.375 | 6 | 5.5625 | | 3.8% | -7.3% | | Second Calibration | Circle 2 | 4 | 4.125 | 4 | 3.75 | | 3.1% | -6.3% | | Second Calibration | Square 2 | 4 | 4.125 | 4 | 3.75 | | 3.1% | -6.3% | | Third (Current)Calibration | Circle 3 | 4 | 4.09375 | 4 | 3.78125 | | 2.3% | -5.5% | | Third (Current)Calibration | Square 3 | 4 | 4.09375 | 4 | 3.78125 | | 2.3% | -5.5% | Things got a bit better after the third calibration, but still off way too much to do anything with the machine. And that might be because I did this test a bit more in the center of the frame. The first two cuts were a little bit lower and to the left, but still well within the “green area” of cutting. I also included the last Serial output from the most recent calibration & current maslow.yaml file in case that helps with any diagnosis. [Maslow-serial (19Jul2025-AfterCalibration).log](https://forums.maslowcnc.com/uploads/short-url/8L7qbHjZbK29S4X3aAkuYXgDKW1.log) (45.8 KB) [maslow (19Jul2025-10AM).yaml](https://forums.maslowcnc.com/uploads/short-url/hX1ZzvhpiF6t9fB6iGF0OWZQTRI.yaml) (5.4 KB) Any help or thoughts greatly appreciated at this point. ---
**Author:** ![ian\_ab](https://avatars.discourse-cdn.com/v4/letter/i/a587f6/32.png) [@ian\_ab](https://forums.maslowcnc.com/u/ian_ab)\ **Post date:** [July 19, 2025, 9:40pm UTC](https://forums.maslowcnc.com/t/cut-parts-are-slightly-skewed-next-troubleshooting-steps/24236/4 "2025-07-19T21:40:28Z")
> [@wsmagee](#): > > current maslow.yaml file You could try adjusting scale values in your yaml file: Maslow\_Scale\_X: 1.000000 Maslow\_Scale\_Y: 1.000000 ---
**Author:** ![Paul\_Langard](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/paul_langard/32/28629_2.png) [@Paul\_Langard](https://forums.maslowcnc.com/u/Paul_Langard)\ **Post date:** [July 19, 2025, 9:48pm UTC](https://forums.maslowcnc.com/t/cut-parts-are-slightly-skewed-next-troubleshooting-steps/24236/5 "2025-07-19T21:48:49Z")
hi, from a quick look, your frame dimensions are quite a bit off from the 132" you are announcing. What worked for me regarding dimensional accuracies was to measure everything by hand (even diagonals) and calculate the appropriate coordinates accordingly, with BL(0;0). If you don’t know a software to do so, you can try with chatgpt ---
**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:** [July 19, 2025, 10:05pm UTC](https://forums.maslowcnc.com/t/cut-parts-are-slightly-skewed-next-troubleshooting-steps/24236/6 "2025-07-19T22:05:06Z")
Paul Langard wrote: > What worked for me regarding dimensional accuracies was to measure everything > by hand (even diagonals) and calculate the appropriate coordinates > accordingly, with BL(0;0). If you don’t know a software to do so, you can try > with chatgpt here is one you can use (you will need to rotate things to read the text > [@Maslow 4 manual configuration (onshape doc)](https://forums.maslowcnc.com/t/maslow-4-manual-configuration-onshape-doc/20861): > > note that if the maslow thinks distances are X and your tape measure says they are Y, the maslow is correct (at least as far as getting good cuts are concerned) since the current calibration gives different coordinates on different runs of up to a couple of mm, that seems in the same ballpark as the errors of manually reading a tape measure, so I threw together this onshape doc that lets you enter measurements and it shows the frame and calculates the coordinates. I have you measure both diago… David Lang ---
**Author:** ![bar](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/bar/32/10_2.png) [@bar](https://forums.maslowcnc.com/u/bar)\ **Post date:** [July 20, 2025, 10:13pm UTC](https://forums.maslowcnc.com/t/cut-parts-are-slightly-skewed-next-troubleshooting-steps/24236/7 "2025-07-20T22:13:16Z")
> [@wsmagee](#): > > It’s not without flex, but the flex is not in direction that the belts really pull. It’s seems quite stiff in those directions. This would be my first thought but the log seems to look OK. `[MSG:INFO: Flex measurement: TLBR: 3.646 TRBL: 4.024]` I do still think that could be a concern. The frame flex test is done right in the middle which like you said will be the direction the arms have the least flex. Have you tried entering manual measurements for the anchor points locations? Some folks have reported good luck with that ---
**Author:** ![wsmagee](https://avatars.discourse-cdn.com/v4/letter/w/9d8465/32.png) [@wsmagee](https://forums.maslowcnc.com/u/wsmagee)\ **Post date:** [July 21, 2025, 8:30pm UTC](https://forums.maslowcnc.com/t/cut-parts-are-slightly-skewed-next-troubleshooting-steps/24236/8 "2025-07-21T20:30:21Z")
Thanks for the info. I will give the manual measurement and calcs a try. ---
**Author:** ![wsmagee](https://avatars.discourse-cdn.com/v4/letter/w/9d8465/32.png) [@wsmagee](https://forums.maslowcnc.com/u/wsmagee)\ **Post date:** [July 21, 2025, 8:31pm UTC](https://forums.maslowcnc.com/t/cut-parts-are-slightly-skewed-next-troubleshooting-steps/24236/9 "2025-07-21T20:31:55Z")
> [@bar](#): > > > [@wsmagee](#): > > > > It’s not without flex, but the flex is not in direction that the belts really pull. It’s seems quite stiff in those directions. > > This would be my first thought but the log seems to look OK. > > `[MSG:INFO: Flex measurement: TLBR: 3.646 TRBL: 4.024]` > > I do still think that could be a concern. The frame flex test is done right in the middle which like you said will be the direction the arms have the least flex. > > Have you tried entering manual measurements for the anchor points locations? Some folks have reported good luck with that What should one expect to see as far as Flex measurement goes in the calibration results for a “low” flex frame. ---
**Author:** ![wsmagee](https://avatars.discourse-cdn.com/v4/letter/w/9d8465/32.png) [@wsmagee](https://forums.maslowcnc.com/u/wsmagee)\ **Post date:** [July 21, 2025, 10:56pm UTC](https://forums.maslowcnc.com/t/cut-parts-are-slightly-skewed-next-troubleshooting-steps/24236/10 "2025-07-21T22:56:56Z")
@dlang & @bar If I understand the process for manually entering. I first need to take the measurements of the belt anchor pin points, Top, Bottom, Left, Right & Diagonals. Can you confirm that those measurements should be center to center at each anchor pin point. Then take that info and run through that calculator in the other thread that is linked above. If that is correct, then that is what I did and got the following results. Which if I understand that error may be too high, as it should be close to zero. And if it’s too high then that means I measured or entered something wrong? I double checked my measurements and measuring to 1/16" accuracy at this point, I get the following from the calculator. ![AnchorCalc](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/3X/7/8/7872cfd36aac9f5c99be0927eeae01b521ba5e5b.png) Then I should edit the maslow.yaml file and updated the Anchor Location values. ![yaml](https://canada1.discourse-cdn.com/flex031/uploads/maslowcnc/original/3X/d/7/d74914bf6745e444f83247d75de0d939fe967283.png) Then I did all that and rebooted the Maslow4.1, then did a retract all, then extend all, pined the anchors, but after pressing tension id did tighted the belts, but it would not let me move the device. It said the Maslow was not ready. If I understand the calculations, is my issue that the -27.98 error is too large? That should be closer to zero ±4ish? ---
**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:** [July 22, 2025, 5:21pm UTC](https://forums.maslowcnc.com/t/cut-parts-are-slightly-skewed-next-troubleshooting-steps/24236/11 "2025-07-22T17:21:02Z")
Wayland Magee wrote: > If I understand the process for manually entering. I first need to take the measurements of the belt anchor pin points, Top, Bottom, Left, Right & Diagonals. Can you confirm that those measurements should be center to center at each anchor pin point. they can be center-to-center, of left edge to left edge, or right edge to right edge. just not left edge to right edge it’s sometimes hard to determine the center accurately, so edge to edge is frequently easier to do. you can even put a hex bolt in and go edge to edge of the hex bolt, just as long as you use the same edge. > If I understand the calculations, is my issue that the -27.98 error is too > large? That should be closer to zero ±4ish? yes, this error is far too large, it should be \<1mm ideally. this is in here to catch the situation where you mess up the measurements. David Lang ---
**Author:** ![wsmagee](https://avatars.discourse-cdn.com/v4/letter/w/9d8465/32.png) [@wsmagee](https://forums.maslowcnc.com/u/wsmagee)\ **Post date:** [July 22, 2025, 10:26pm UTC](https://forums.maslowcnc.com/t/cut-parts-are-slightly-skewed-next-troubleshooting-steps/24236/12 "2025-07-22T22:26:34Z")
Ok. Thanks for clarifying. Ill work on getting way more accurate measurements and see where that leads me.