# Help！Sir！Delta calibration went wrong about delta-radius **URL:** \ **Category:** General Discussion\ **Created:** [January 2, 2024, 9:16am UTC](https://klipper.discourse.group/t/help-sir-delta-calibration-went-wrong-about-delta-radius/12783 "2024-01-02T09:16:04Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![feidhlim](https://avatars.discourse-cdn.com/v4/letter/f/edb3f5/32.png) [@feidhlim](https://klipper.discourse.group/u/feidhlim)\ **Post date:** [January 2, 2024, 9:16am UTC](https://klipper.discourse.group/t/help-sir-delta-calibration-went-wrong-about-delta-radius/12783/1 "2024-01-02T09:16:04Z")
### Basic Information: Printer Model: DIY delta MCU / Printerboard: mks gen l v2.1 `klippy.log` _Fill out above information and_ **_in all cases attach your_ `klippy.log` _file_** (use zip to compress it, if too big). _Pasting your_ `printer.cfg` _is **not** needed_ _ **Be sure to check our “Knowledge Base” Category first. Most relevant items, e.g. error messages, are covered there** _ ### Describe your issue: I tried to calibrate my delta with delta\_calibrate command, the arm\_length and position\_end\_stop are correct as they are defined by me, but after calibration the delta \_radius generated by klipper is 287 which is apparently wrong because my printer has a bed size of 190 radius. I didn’t notice it before as I trust this automation too much then I did bed\_mesh and print.This is the time I realized the delta\_radius was wrong and the bed \_mesh seems over compensate about 1.5 times which is generally the ratio wrong\_delta\_radius/correct\_delta\_radius. I tried several days to figure this out but nothing came up. Please if someone knows about this issue I’m very grateful with your help. [klippy (2).log](https://klipper.discourse.group/uploads/short-url/vMeUkhYK8Lpf00pzwYlIR1dxdPu.log) (2.9 MB) ---
**Author:** ![LifeOfBrian](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/lifeofbrian/32/2380_2.png) [@LifeOfBrian](https://klipper.discourse.group/u/LifeOfBrian)\ **Post date:** [January 2, 2024, 9:19am UTC](https://klipper.discourse.group/t/help-sir-delta-calibration-went-wrong-about-delta-radius/12783/2 "2024-01-02T09:19:02Z")
Please upload your klippy.log and don’t put your normal text into preformatted text tags. Only do this for code uploads! ---
**Author:** ![feidhlim](https://avatars.discourse-cdn.com/v4/letter/f/edb3f5/32.png) [@feidhlim](https://klipper.discourse.group/u/feidhlim)\ **Post date:** [January 2, 2024, 10:41am UTC](https://klipper.discourse.group/t/help-sir-delta-calibration-went-wrong-about-delta-radius/12783/3 "2024-01-02T10:41:59Z")
oh,okay,sorry I didn’t notice this as I was editing on the phone, I think it should be correct now. ---
**Author:** ![feidhlim](https://avatars.discourse-cdn.com/v4/letter/f/edb3f5/32.png) [@feidhlim](https://klipper.discourse.group/u/feidhlim)\ **Post date:** [January 2, 2024, 11:04am UTC](https://klipper.discourse.group/t/help-sir-delta-calibration-went-wrong-about-delta-radius/12783/4 "2024-01-02T11:04:46Z")
oh, I just realized the delta\_radius is acctually correct, since I neglect the part oustside bed, but the issue still exists, now I think there maybe something wrong with the arm\_length, the calibration just copy what I insert instead of giving some more precise value. ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\ **Post date:** [March 2, 2024, 11:05am UTC](https://klipper.discourse.group/t/help-sir-delta-calibration-went-wrong-about-delta-radius/12783/5 "2024-03-02T11:05:02Z")
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