# Root Controller **URL:** https://rootcnc.discourse.group/c/root-controller/10.md [Latest](https://rootcnc.discourse.group/latest.md) · [Categories](https://rootcnc.discourse.group/categories.md) · [Tags](https://rootcnc.discourse.group/tags.md) --- ## [About the Root Controller category](https://rootcnc.discourse.group/t/about-the-root-controller-category/17)
**Author:** [@sailorpete](https://rootcnc.discourse.group/u/sailorpete)\ **Replies:** 0
Use the Root CNC controller (ESP32 GRBL) category to discuss anything specific to the Root CNC controller. --- ## [Configuration of N/C Contacts](https://rootcnc.discourse.group/t/configuration-of-n-c-contacts/462)
**Author:** [@Darrin](https://rootcnc.discourse.group/u/Darrin)\ **Replies:** 2\ **Last updated:** [9 December 2025 10:25 UTC](https://rootcnc.discourse.group/t/configuration-of-n-c-contacts/462 "2025-12-09T10:25:04Z")
I’m using N/C contacts for my limit switches, however, I’m unable to figure out how to configure the yaml config file to allow this. Using “limit\_all\_pin: gpio.34” I can get the limit to act as a N/O contact when connect… --- ## [Root Controller 2.1 for sale in EU](https://rootcnc.discourse.group/t/root-controller-2-1-for-sale-in-eu/460)
**Author:** [@jodldoe](https://rootcnc.discourse.group/u/jodldoe)\ **Replies:** 0\ **Last updated:** [3 October 2025 14:45 UTC](https://rootcnc.discourse.group/t/root-controller-2-1-for-sale-in-eu/460 "2025-10-03T14:45:25Z")
I have a root cnc controller iso 2.1 for sale in the EU. Never used as I never got to build the machine. Willing to give it away at a good price for someone who needs it. Hope its ok to post here. --- ## [Root controller iso, DM556D stepper drivers need help with setup](https://rootcnc.discourse.group/t/root-controller-iso-dm556d-stepper-drivers-need-help-with-setup/459)
**Author:** [@Mike\_G](https://rootcnc.discourse.group/u/Mike_G)\ **Replies:** 4\ **Last updated:** [15 September 2025 20:29 UTC](https://rootcnc.discourse.group/t/root-controller-iso-dm556d-stepper-drivers-need-help-with-setup/459 "2025-09-15T20:29:53Z")
Hi all. I had a NVEM controller before but it had issues with emi so im upgrading to a Root controller iso. Im having issues with the setup of the stepper drivers, Drivers is DM556D connected with common cathode but i… --- ## [Closed loop stepper driver](https://rootcnc.discourse.group/t/closed-loop-stepper-driver/402)
**Author:** [@Bdm01](https://rootcnc.discourse.group/u/Bdm01)\ **Replies:** 9\ **Last updated:** [15 September 2025 20:27 UTC](https://rootcnc.discourse.group/t/closed-loop-stepper-driver/402 "2025-09-15T20:27:47Z")
Hi, Any recommendations of closed loop stepper drivers/motors that will work with root controller Regards Richard --- ## [Root controller iso 3 detailed pinout?](https://rootcnc.discourse.group/t/root-controller-iso-3-detailed-pinout/445)
**Author:** [@Braylon](https://rootcnc.discourse.group/u/Braylon)\ **Replies:** 1\ **Last updated:** [7 April 2025 22:00 UTC](https://rootcnc.discourse.group/t/root-controller-iso-3-detailed-pinout/445 "2025-04-07T22:00:20Z")
I’m currently trying to figure out which port is attached to what pin and I don’t see a pinout diagram of the controller except for what is on the wiki but it’s not very clear which ports are what when it comes to certai… --- ## [ATC capability?](https://rootcnc.discourse.group/t/atc-capability/443)
**Author:** [@Pierre](https://rootcnc.discourse.group/u/Pierre)\ **Replies:** 1\ **Last updated:** [7 April 2025 21:55 UTC](https://rootcnc.discourse.group/t/atc-capability/443 "2025-04-07T21:55:36Z")
did anyone use ATC spindle with the root controller ? i’m curious about upgrading to an ATC spindle for productivity but I 'm not shure about the way to go to program it with the root controller. Not even sure if possib… --- ## [Laser setup with root controller](https://rootcnc.discourse.group/t/laser-setup-with-root-controller/432)
**Author:** [@Bdm01](https://rootcnc.discourse.group/u/Bdm01)\ **Replies:** 1\ **Last updated:** [14 March 2025 20:43 UTC](https://rootcnc.discourse.group/t/laser-setup-with-root-controller/432 "2025-03-14T20:43:26Z")
So have my cnc all set up and working with spindle control Does anyone have the bit of yaml code I need to write into my file to control a Laser ? I’m sure someone must have done it Pete if your out there you have as I… --- ## [Problem testing Root Controller ISO](https://rootcnc.discourse.group/t/problem-testing-root-controller-iso/306)
**Author:** [@mjmnz](https://rootcnc.discourse.group/u/mjmnz)\ **Replies:** 15\ **Last updated:** [2 March 2025 21:39 UTC](https://rootcnc.discourse.group/t/problem-testing-root-controller-iso/306 "2025-03-02T21:39:40Z")
I have the Root Controller set up on the bench and have been attempting to get a basic setup working before replacing the current controller in my home-built CNC. I followed your video showing your demo and have FluidNC … --- ## [G-code sender supporting rotary axis - XYZA](https://rootcnc.discourse.group/t/g-code-sender-supporting-rotary-axis-xyza/311)
**Author:** [@mjmnz](https://rootcnc.discourse.group/u/mjmnz)\ **Replies:** 8\ **Last updated:** [14 January 2025 08:20 UTC](https://rootcnc.discourse.group/t/g-code-sender-supporting-rotary-axis-xyza/311 "2025-01-14T08:20:56Z")
Hi, I’m in the process of re-commissioning my 4 axis CNC now that I have switched to the Root controller. I have all 4 axis working and the 3-axis fully commissioned using bCNC on a RaspberryPi as the local (to machine… --- ## [Best way to control Root Controller](https://rootcnc.discourse.group/t/best-way-to-control-root-controller/422)
**Author:** [@peterashuk](https://rootcnc.discourse.group/u/peterashuk)\ **Replies:** 2\ **Last updated:** [4 January 2025 20:59 UTC](https://rootcnc.discourse.group/t/best-way-to-control-root-controller/422 "2025-01-04T20:59:55Z")
Hi, I currently have a basic grbl system running on an arduino with external stepper motor drivers. I am using Openbuilds Control software v1.0.382 on a PC and this has worked reasonably well until recently when I have … --- ## [Using SolidCam for machining](https://rootcnc.discourse.group/t/using-solidcam-for-machining/401)
**Author:** [@TheKrapos](https://rootcnc.discourse.group/u/TheKrapos)\ **Replies:** 0\ **Last updated:** [18 October 2024 17:08 UTC](https://rootcnc.discourse.group/t/using-solidcam-for-machining/401 "2024-10-18T17:08:46Z")
I am using a Root controller for my WM16 milling machine, I now want to add a 4th and 5th axis. So far I have used fusion 360 for 3 axis machining and that has been great, but dont want to pay for professional when I am… --- ## [Config.yaml file help with](https://rootcnc.discourse.group/t/config-yaml-file-help-with/387)
**Author:** [@WizFromOz](https://rootcnc.discourse.group/u/WizFromOz)\ **Replies:** 0\ **Last updated:** [8 August 2024 04:24 UTC](https://rootcnc.discourse.group/t/config-yaml-file-help-with/387 "2024-08-08T04:24:24Z")
Hi all. I have the previous Rev 2.1 root controller. Just asking please if someone would have a usable config.yaml file they could share with me to help get me started cheers and happy cncing --- ## [VFD types where’s the information](https://rootcnc.discourse.group/t/vfd-types-where-s-the-information/383)
**Author:** [@Bdm01](https://rootcnc.discourse.group/u/Bdm01)\ **Replies:** 0\ **Last updated:** [15 July 2024 19:21 UTC](https://rootcnc.discourse.group/t/vfd-types-where-s-the-information/383 "2024-07-15T19:21:38Z")
Saw some info on connecting a YL 620 A VFD Can’t find it again where is it please --- ## [Source of information](https://rootcnc.discourse.group/t/source-of-information/381)
**Author:** [@Bdm01](https://rootcnc.discourse.group/u/Bdm01)\ **Replies:** 0\ **Last updated:** [14 July 2024 16:00 UTC](https://rootcnc.discourse.group/t/source-of-information/381 "2024-07-14T16:00:59Z")
Hi, Where can I found a list of information regarding the pin outs for the inputs and motor driver connections. Getting confused between I2S and GPIO connections Going round in circles between GitHub, Fluid NC and roo… --- ## [Problem when stopping a job](https://rootcnc.discourse.group/t/problem-when-stopping-a-job/353)
**Author:** [@mjmnz](https://rootcnc.discourse.group/u/mjmnz)\ **Replies:** 5\ **Last updated:** [12 March 2024 21:21 UTC](https://rootcnc.discourse.group/t/problem-when-stopping-a-job/353 "2024-03-12T21:21:29Z")
Using bCNC g-code sender running n a RPi and FluidNC. Latest versions. Using bCNC, if I pause and then stop a job, FluidNC initially stop XYZ movement (on Pause) but when Stop (bCNC) is selected FluidNC appears to run a… --- ## [Help for someone new to CNC and controllers](https://rootcnc.discourse.group/t/help-for-someone-new-to-cnc-and-controllers/363)
**Author:** [@Bdm01](https://rootcnc.discourse.group/u/Bdm01)\ **Replies:** 1\ **Last updated:** [12 March 2024 21:20 UTC](https://rootcnc.discourse.group/t/help-for-someone-new-to-cnc-and-controllers/363 "2024-03-12T21:20:01Z")
Hi, New to most of this, but been messinf with a small 30x40 machine with a basic GRBL controller on it and now doing some mods to beef the machine up part of which will be a new controller that works with stepper drive… --- ## [\*\*No connect to FW\*\* after flashing fluidNC](https://rootcnc.discourse.group/t/no-connect-to-fw-after-flashing-fluidnc/361)
**Author:** [@WhoAmI](https://rootcnc.discourse.group/u/WhoAmI)\ **Replies:** 2\ **Last updated:** [21 February 2024 21:48 UTC](https://rootcnc.discourse.group/t/no-connect-to-fw-after-flashing-fluidnc/361 "2024-02-21T21:48:09Z")
WEBSERVER 192.168.0.1 on root Controller: No connect to FW after flashing fluidNC and upload the config.yaml What to do ? --- ## [Need support / reccomendation](https://rootcnc.discourse.group/t/need-support-reccomendation/357)
**Author:** [@pst](https://rootcnc.discourse.group/u/pst)\ **Replies:** 0\ **Last updated:** [5 February 2024 11:42 UTC](https://rootcnc.discourse.group/t/need-support-reccomendation/357 "2024-02-05T11:42:16Z")
Hi. I’m thinking of replacing my xpro v5 with the Root controller ISO rev. 3 I have a queenbee 1500x1500 Cnc (XYYZ, Nema 23) with a 2.2 kW spindle and Huanyang VFD (currently on RS485 comms.) To this I would like to a… --- ## [RC to LPT: available?](https://rootcnc.discourse.group/t/rc-to-lpt-available/328)
**Author:** [@Frenchman](https://rootcnc.discourse.group/u/Frenchman)\ **Replies:** 1\ **Last updated:** [20 November 2023 19:46 UTC](https://rootcnc.discourse.group/t/rc-to-lpt-available/328 "2023-11-20T19:46:32Z")
Just a quick question : I am waiting for my RC ISO to arrive, and I am wondering if there is an interface-board available somewhere that hooks into the different XYZA outputs of the RC ISO and connect into a parallel LP… --- ## [Error initializing the SD Card](https://rootcnc.discourse.group/t/error-initializing-the-sd-card/334)
**Author:** [@michaeljtrefry](https://rootcnc.discourse.group/u/michaeljtrefry)\ **Replies:** 1\ **Last updated:** [20 November 2023 19:34 UTC](https://rootcnc.discourse.group/t/error-initializing-the-sd-card/334 "2023-11-20T19:34:07Z")
I’ve recently purchased a Rot Controller ISO v3, and everything is running perfectly. Except … I can’t upload files to it because the SD card gives an error on initialization. \[MSG:ERR: sdmmc\_card\_init failed code 0x10… --- ## [Losing connection between Controller and RS485 connected Huanyang VFD](https://rootcnc.discourse.group/t/losing-connection-between-controller-and-rs485-connected-huanyang-vfd/312)
**Author:** [@mjmnz](https://rootcnc.discourse.group/u/mjmnz)\ **Replies:** 6\ **Last updated:** [7 September 2023 20:33 UTC](https://rootcnc.discourse.group/t/losing-connection-between-controller-and-rs485-connected-huanyang-vfd/312 "2023-09-07T20:33:21Z")
I’m experiencing some frustrating behaviour and I’m not sure what is causing it. My Root Controller and RPi terminal are mounted quite close to the VFD which is earthed. Being close the wiring is short. Photo attached. … --- ## [Root controller ISO - which post processor for Fusion360 CAM?](https://rootcnc.discourse.group/t/root-controller-iso-which-post-processor-for-fusion360-cam/310)
**Author:** [@mjmnz](https://rootcnc.discourse.group/u/mjmnz)\ **Replies:** 4\ **Last updated:** [7 September 2023 20:20 UTC](https://rootcnc.discourse.group/t/root-controller-iso-which-post-processor-for-fusion360-cam/310 "2023-09-07T20:20:06Z")
I’m nearing the completion of replacing my cnc controller with a RootCNC controller ISO. I use both Fusion360 CAD/CAM and VCarve desktop. Can I use the standard GBRL post processor or is there an better option? I’ve b… --- ## [LED Laser recommendations and experiences](https://rootcnc.discourse.group/t/led-laser-recommendations-and-experiences/313)
**Author:** [@mjmnz](https://rootcnc.discourse.group/u/mjmnz)\ **Replies:** 1\ **Last updated:** [7 September 2023 09:02 UTC](https://rootcnc.discourse.group/t/led-laser-recommendations-and-experiences/313 "2023-09-07T09:02:17Z")
I have a 600 x 400 50W CO2 laser in a blue cabinet. Bought second hand and originally shipped from China. It works great but sooner or later the CO2 tube will die and the replacement will be hundreds of NZ$. I’ve been l… --- ## [Who Uses Fusion 360 for CAM](https://rootcnc.discourse.group/t/who-uses-fusion-360-for-cam/78)
**Author:** [@Pete](https://rootcnc.discourse.group/u/Pete)\ **Replies:** 6\ **Last updated:** [23 August 2023 21:35 UTC](https://rootcnc.discourse.group/t/who-uses-fusion-360-for-cam/78 "2023-08-23T21:35:15Z")
Just wondering who else uses Fusion 360 for their Design and CAM (Gcode Generation). Do you also have the rapid moves limited in the Gcode generation? --- ## [Power-on cycle for Root Controller ISO 3 and Huanyang VFD controller](https://rootcnc.discourse.group/t/power-on-cycle-for-root-controller-iso-3-and-huanyang-vfd-controller/309)
**Author:** [@mjmnz](https://rootcnc.discourse.group/u/mjmnz)\ **Replies:** 1\ **Last updated:** [20 August 2023 09:43 UTC](https://rootcnc.discourse.group/t/power-on-cycle-for-root-controller-iso-3-and-huanyang-vfd-controller/309 "2023-08-20T09:43:23Z")
With my previous controller I got into the habit of switching on the Huanyang VFD only when I was about to start machining, doing the tool and zero coordinate setup with the VFD controller off. I note that in the FluidN… --- ## [Pull-up/down resistors for endstops?](https://rootcnc.discourse.group/t/pull-up-down-resistors-for-endstops/291)
**Author:** [@Alfonso23](https://rootcnc.discourse.group/u/Alfonso23)\ **Replies:** 2\ **Last updated:** [11 May 2023 18:10 UTC](https://rootcnc.discourse.group/t/pull-up-down-resistors-for-endstops/291 "2023-05-11T18:10:37Z")
Hello I have bought a Root Controller ISO rev3 and it looks very good. It is already working with my motors. Now I am going to install NC endstops. However I have a doubt with the switches and I am worried because I hav… --- ## [Is the root controller still in production?](https://rootcnc.discourse.group/t/is-the-root-controller-still-in-production/201)
**Author:** [@jodldoe](https://rootcnc.discourse.group/u/jodldoe)\ **Replies:** 2\ **Last updated:** [5 April 2022 22:12 UTC](https://rootcnc.discourse.group/t/is-the-root-controller-still-in-production/201 "2022-04-05T22:12:02Z")
hi pete, i am just starting with a build and i was wondering if a new batch of root controllers (which is currently sold out) will become available in the next couple of weeks? if so, is there a waiting list? i would be… --- ## [Root Controller - Calling for BETA testers](https://rootcnc.discourse.group/t/root-controller-calling-for-beta-testers/106)
**Author:** [@Pete](https://rootcnc.discourse.group/u/Pete)\ **Replies:** 5\ **Last updated:** [8 July 2021 16:19 UTC](https://rootcnc.discourse.group/t/root-controller-calling-for-beta-testers/106 "2021-07-08T16:19:50Z")
Hi all, I have four of these CNC ESP32 GRBL motion controllers lying in my draw and was wondering if anyone would like to participate in a BETA tester scheme? Price for BETA participation is £75 includ… --- ## [Marlin code for cnc](https://rootcnc.discourse.group/t/marlin-code-for-cnc/59)
**Author:** [@sebash1992](https://rootcnc.discourse.group/u/sebash1992)\ **Replies:** 7\ **Last updated:** [27 April 2021 21:49 UTC](https://rootcnc.discourse.group/t/marlin-code-for-cnc/59 "2021-04-27T21:49:04Z")
Hi all, anyone has a link with a marling configuration for root cnc? Regards [Next page](https://rootcnc.discourse.group/c/root-controller/10.md?page=1)