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Teensy 4.1 CNC Controller

Teensy 4.1 based 5 Axis, Ethernet CNC controller running grblHAL.

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Teensy 4.1 Breakout Board for grblHAL Motion Controller SW. Supports up to 5 Axes, VFD Spindles (0-10V, PWM, Relay), Dust Extraction Relay ganged to Spindle, Independent control of Dust Extractor (for later clean up), I2C and Serial connections, Can directly drive 7 relays including Spindle, Dust Extractor, Flood coolant, mist coolant and 3 auxiliary relays. Interface is via USB or Ethernet. Screw terminals for reliable connections.

Designed for grblHAL, a 32-bit version of the classic Grbl motion controller. grblHAL runs on a number of 32-bit microcontrollers including iMXRT1062 (Teensy 4.x), STM32 (blue and black pill), ESP32, SAM (Due and MKRZERO) and TI 432. It supports high stepping rates. I spec my board for 160 KHz but bare grblHAL can produce up to 400KHz. Highly modular, it is easy to configure. It is definitely not your father's Grbl!

This is currently running in a number of CNC machines. The photos show an entry level CNC machine with a 300x300mm work envelope

T41U5XBB v207.pdf

User manual including assembly instructions and BOM.

Adobe Portable Document Format - 7.62 MB - 10/05/2020 at 05:11

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3D2Code wrote 11/18/2020 at 15:30 point

I looked at the grbl-HAL code on GitHub and looks like it supports G5 (cubic bezier splines) in 2 axes. Do you know whether there is a plan to expand this to all 5 axes? 

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phil-barrett wrote 11/20/2020 at 07:08 point

Sorry for responding so late.  I don't know the answer. You could ask Terje (the grblHAL developer) on the grblHAL github repository in the issues section - https://github.com/terjeio/grblHAL

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3D2Code wrote 11/20/2020 at 14:10 point

Will do. 

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phil-barrett wrote 11/18/2020 at 08:34 point

Drew, those are real  TB6600 drivers. I bought them a few years ago before the plague of fake TB6600s arose like Covid.  I did a tear down on one of the current "TB6600" drivers - not a real TB6600 chip in it.  https://www.grbl.org/single-post/tb6600-fake-or-not-but-who-cares  I am hard pressed to find a driver built around a real Toshiba TB6600.

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drew wrote 11/18/2020 at 08:11 point

Just wondering what driver boards you're using in the above system.

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phil-barrett wrote 11/17/2020 at 17:52 point

I am currently sold out of boards but I have a new shipment waiting for carrier pickup in Shenzhen. Should be here by the end of the week. 

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phil-barrett wrote 6 days ago point

Well, FedEx is a bit slower than I thought. They are now saying Tuesday11/24 though they some times under promise/over deliver. So, you might want to check the Tindie store on Monday.

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phil-barrett wrote 11/16/2020 at 21:56 point

Hello, a quick update. I am putting the finishing touches on a "Pro" version of the board.  It includes FRAM for logging machine time, Pluggable Screw Terminals, USB Host support, high speed quad encoder support, spindle sync input and daughter card mounts for I2C and Serial IO.  Updates as I start testing the first boards.

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phil-barrett wrote 11/14/2020 at 21:23 point

Thanks.  It's based on a CBeam router from open builds.  Here are some detail https://www.grbl.org/cbeam-machine

To be honest, wouldn't recommend the mechanicals. It's OK but I don't like the moving bed on a single CBeam rail.   Better to get a small WorkBee.  Happy to answer any other questions.

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jason wrote 11/14/2020 at 20:50 point

i know the project is about the controller, but i love the look of your cnc router.. any details?

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