Hyatt and My Journey to Tonehenge

My Hyatt machine will assist in guitar speaker cabinet fabrication including single and multiple speaker (2, 4, and 6) designs.




The screw-driven Openbuilds Workbee 1010 was perfect.



With limited workshop space, Hyatt will store inside my 9'x5' workbench and rise to working height with a mechanical lift system.



Many speaker cabinet designs use finger joinery. Hyatt has a removal split work surface that enables vertical stock end milling. Using vertically-mounted Rockler Vacuum Clamps, vertical stock protrudes through the Hyatt base for stock-edge finger joint cutting.



Hyatt steps up motion performance using JMC NEMA23 2NM integrated step-servo motors with driver and position encoder.



I also wanted a machine that my granddaughter and wife could operate manually (ie no CAD/CAM/Sender). She and I work on various projects together.





A variety of operator interface projects exist, mostly involve a laptop or RPi. I didn't want this for Hyatt. There's too much to know, the operating learning curve is too long. Hyatt must turn on and be ready to run in 5 seconds. Otherwise my now-impatient granddaughter will go back to playing computer games. I want her to experience the joy of precise machining and project builds.


That being said, I set off to create an operator interface and machine control system using Bart Dring's GRBL Cypress PSoC5 port that includes the following.

Hyatt Feature Set

• CY8KIT-059 based design
• 4 axis CNC controller, Dring GRBL port - PSoC HW pulse generation, debounce, interrupts
• Spindle speed/direction control - PSoC PWM
• Piezo element work piece probe - PSoC opamp, ADC, DAC comparator, interrupt
• Motor drive current monitor - PSoC analog mux and ADC
• Supply voltage monitor - PSoC ADC
• WiFi link with webserver, OTA, flash filesystem, websockets, TCP-serial bridge using ESP8266 - PSoC USART

Operator Interface

• 12 illuminated buttons via I2C I/O port expanders - PSoC I2C Fixed master
• Jog wheel with quad encoder - PSoC quad decoder
• 20x4 LCD panel display - PSoC I2C Fixed master
• 3.5" TFT 480x320 resistive touch screen display, attached to X axis gantry - PSoC USART
• Real-time feed speed override - PSoC ADC
• SDCard reader- PSoC SPI EmFile library
• Wireless CNC pendant - DirecTV remote control - my custom IR decoder using PSoC digital logic

Custom PCB board, 100x100mm 2 layer, mixed through and SMT parts, see holla2040/hyatt









My complete build progress is documented here, The Valve Studio WorkBee 1010 Build and holla2040/hyatt .

I'm almost done and operational. Step-servo performance is unbelievable with 0.001mm positional accuracy (100x better that I need). See


Project named after Dale Hyatt, the one of the original K&F (Kaufman and Fender) guitar amp cabinet makers. See "The Sound Heard 'Round the World", Richard Smith, p28.