# Grounded Static DC Hose and Probing XYZ **URL:** \ **Category:** Accessories\ **Created:** [November 4, 2022, 9:43am UTC](https://forum.onefinitycnc.com/t/grounded-static-dc-hose-and-probing-xyz/16273 "2022-11-04T09:43:04Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![JimChilders](https://avatars.discourse-cdn.com/v4/letter/j/b4bc9f/32.png) [@JimChilders](https://forum.onefinitycnc.com/u/JimChilders)\ **Post date:** [November 4, 2022, 9:43am UTC](https://forum.onefinitycnc.com/t/grounded-static-dc-hose-and-probing-xyz/16273/1 "2022-11-04T09:43:04Z")
Still making so many mistakes it is crazy, however now that I have my first carve behind me and before I make another change, looking for knowledge in the Probe XYZ and grounded DC hose. My DC is all metal and well bonded. I had a 4” to 2” reducer with 2” static dissipating hose, but on my first probe kept having problems with probing coming up out of limit. My hose was laying on the 50 mm chrome X rail and I reasoned that the hose was shunting some of the current from the probe resulting in inaccurate results. I took out the 2” line and cut up an old shop vac hose and duct taped it to the metal reducer above the table. That seemed to work. However I also moved the piece a short time later and now I’m wondering if I didn’t have the piece set outside the limits for the plunge angle. At this point I was just trying to carve the QC piece preloaded on the controller from 1F. So, the shop vac hose doesn’t fit well in the dust boot and it also collects some dust on the outside of the boot. Instead of using the shop vac cut 1.5 or 1.25 hose I’m going to have to either buy a section of good hose or rework everything. Just curious if I’m over analyzing a newbie mistake or that in fact you can shunt current away from the probe and cause mistakes on initial setup. Thanks in advance ---
**Author:** ![Atroz](https://avatars.discourse-cdn.com/v4/letter/a/958977/32.png) [@Atroz](https://forum.onefinitycnc.com/u/Atroz)\ **Post date:** [November 4, 2022, 1:13pm UTC](https://forum.onefinitycnc.com/t/grounded-static-dc-hose-and-probing-xyz/16273/2 "2022-11-04T13:13:40Z")
The probe block is simply a block of a known set of dimensions and it conducts electricity. The wired part conducts the electricity from the controller, it’s a simple on/off switch as far as I know. It either has enough power though it to register as a closed circuit or it doesn’t. The probe does not decide if you are out of bounds, that’s up to the CNC. If you are getting out of bounds there is something wrong with the CNC. Lots of instructions here on how to fix it if it is just a configuration problem. I think you’d be better off with your grounded hose than an ungrounded one. The ungrounded one could create EMI issues, static shocks, etc, which can lead to CNC problems. If you need to get a hose off a rail you can make a boom arm or do a quick and dirty suspension with a bungie cord from the ceiling. ---
**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\ **Post date:** [December 23, 2022, 10:36pm UTC](https://forum.onefinitycnc.com/t/grounded-static-dc-hose-and-probing-xyz/16273/3 "2022-12-23T22:36:56Z")
Hey Jim, just to be sure that everything is done well, first thing after assembling the machine is I would correctly [ground](https://en.wikipedia.org/wiki/Earthing_system) and [bond](https://en.wikipedia.org/wiki/Electrical_bonding) the machine. This should be done for every machine that is an electrical installation made by the operator. Unfortunately, Onefinity say nothing about this topic in their instructions. This topic is e.g. dealt - [here](https://forum.onefinitycnc.com/t/proper-grounding-how-have-you-grounded-your-frame/12331/17) and - [here](https://forum.onefinitycnc.com/t/proper-grounding-how-have-you-grounded-your-frame/12331/22). By the way, to know why you need **two** touch probe wires for the Makita router, but only **one** wire when using a spindle, [see here](https://forum.onefinitycnc.com/t/replacement-curly-cable/14837/7). As for the fit of the dust collector hose to the dust boot,… > [@Is use without dust collection OK?](https://forum.onefinitycnc.com/t/is-use-without-dust-collection-ok/14472/2): > > … at [thingiverse.com](http://thingiverse.com), you can see what Suckit dust boot Vac adaptors look like, e.g. for [this one for Fein](https://www.thingiverse.com/thing:4602574) or for [this one for Festool](https://www.thingiverse.com/thing:4870138) which allow to attach your vacuum. I don’t know the diameter of your vacuum hose, but possibly you can find one matching, or someone will 3D-design and 3D print one for you. For alternative dust boots for the Onefinity, [see here](https://forum.onefinitycnc.com/t/what-is-the-best-dust-boot-for-the-onefinity/14685/4). I don’t think that I fully understood the issue you try to describe. Do you still have issues? When you say “on my first probe kept having problems with probing coming up out of limit”, do you mean you got the “probe not found” error? If so, the usual cause of such an issue is that you did not move the router near enough to the touch probe, by using the [arrow buttons on Jog tab on display](https://buildbotics.com/manual-v1-0/#ControlPageJogTab) or the [gamepad](https://www.onefinitycnc.com/product-page/onefinity-wired-joystick) if you own one.