# Machine ramping when not called for **URL:** \ **Category:** Uncategorized\ **Created:** [December 8, 2022, 6:57pm UTC](https://forum.onefinitycnc.com/t/machine-ramping-when-not-called-for/17211 "2022-12-08T18:57:11Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Tfl](https://avatars.discourse-cdn.com/v4/letter/t/53a042/32.png) [@Tfl](https://forum.onefinitycnc.com/u/Tfl)\ **Post date:** [December 8, 2022, 6:57pm UTC](https://forum.onefinitycnc.com/t/machine-ramping-when-not-called-for/17211/1 "2022-12-08T18:57:11Z")
I’m cutting a two side mirror image on 2.5 thick walnut. Build Dimensions26.5 long 8.0 wide 2.5 thick. 2 side mirrored image I’ve set my cut dept 1.25 With a .25 end mill using five passes Ive homed the machine then reset the end mill at the bottom left corner of the project. Zero of the top of the material Give command to cut and it ramps down about one inch in about 20" of run What am I doing wrong. NEED HELP PLEASE ---
**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\ **Post date:** [December 8, 2022, 7:26pm UTC](https://forum.onefinitycnc.com/t/machine-ramping-when-not-called-for/17211/2 "2022-12-08T19:26:48Z")
Hey Tom, this kind of failure has been reported relatively frequently. When this happens (like [here](https://forum.onefinitycnc.com/t/z-axis-is-crazy-solved-replaced-extension-wire/15743), [here](https://forum.onefinitycnc.com/t/was-soo-excited-then-this/13233) or [here](https://forum.onefinitycnc.com/t/z-axis-changes-during-cut/2266/9)) the cause is usually a cable/connector problem on Z stepper motor cable. Check if all cable connectors for the Z stepper motor sit correctly on all connections between Onefinity CNC Controller and the Z stepper motor. Then mill air (no workpiece or better no milling bit) to check if you can reproduce the error. #### See also - [Support: Z Axis Moving Unexpectedly (Cutting too shallow or too deep)](https://forum.onefinitycnc.com/t/z-axis-moving-unexpectedly-cutting-too-shallow-or-too-deep/14829) ---
**Author:** ![Tfl](https://avatars.discourse-cdn.com/v4/letter/t/53a042/32.png) [@Tfl](https://forum.onefinitycnc.com/u/Tfl)\ **Post date:** [December 8, 2022, 7:58pm UTC](https://forum.onefinitycnc.com/t/machine-ramping-when-not-called-for/17211/3 "2022-12-08T19:58:07Z")
Thanks I’ll try that and let you know the out come ---
**Author:** ![CNCGeek](https://avatars.discourse-cdn.com/v4/letter/c/5fc32e/32.png) [@CNCGeek](https://forum.onefinitycnc.com/u/CNCGeek)\ **Post date:** [December 23, 2022, 10:42pm UTC](https://forum.onefinitycnc.com/t/machine-ramping-when-not-called-for/17211/4 "2022-12-23T22:42:12Z")
yeah man it got me real good and it was a pin pushed back on the curly cable connector. emi can cause this too but id about lay money on it being a connector problem