myCNC-ET7 reflashing procedure may take about 3 minutes.
To reflash the board
Plug 24V DC supply
Plugin micro-USB cable to ET7 & Host Computer with myCNC installed
Close jumpers J5(reset) & J6(programming) on myCNC controller board
Open (remove) J5 jumper.
Open myCNC software on Host computer, Configuration Tab -> Support Tab "Select board" set to "myCNC-ET7" Select "Firmware version" from "Release", "Night build" or "Testing" "UART port" select port with FT232 attached Baud Rate set to "115200" for ET7; other baudrate can be selected in case of problems on 115200 speed
Press "Update Firmware" button, Firmware download and reflashing process will be started.
Sector 0 will be written at the end of process, so message in debug window "Sector 0; +" means reflashing process finished successfully. Remove all jumpers (J4, J5) and restart the board ().
If reflashing process failed, please repeat procedure from #3
myCNC-ET7 controller board
myCNC-ET7 controller specification
Number of axes
Motor driver outputs
pulse-dir, differential line driver outputs compatible with EIA RS-422 Standard
2x - 0...10V range, differential inputs, fully galvanic isolated (for plasma arc voltage measure, THC control), 6x - 0...3V range
1x - 0...10V (for spindle speed control and relative applications)
1x RS422 full duplex serial communication OR 2x RS485 half-duplex serial communication
External operator panel connector
up to 25 external keys up to 2 rotary encodersup to 2 double-axes joysticks OR up to 4 potentiometers (shared with 4x ADC inputs)
Power supply outputs for control computer
2x DC-DC converters 5V 1.5A
myCNC-ET7 connectors description.
Built-in power supply
myCNC-ET7 board contains 2 independent 5V 2A step-down converters which can be used to supply Single board Computer (SBC) and TFT screen to build a complete stand alone CNC control.
Connector X10 has outputs +5V(#1) and +5V(#2) and 2 pins GND. Example connection of SBC Odroid-C2 is shown below
Optional Operator panel board for ET7
myCNC-ET7 control board supports external operator panel which may contains up to 25 keys (matrix 5x5), 2x rotary encoders and up to 2x double-axes joysticks or 4 potentiometers to control CNC parameters. Functions can be flexibly assigned to any key, resistor, joystick, encoder.
Suggested schematic for external operator panel is shown below.
External operator panel connected to ET7 board via X1 connector. X1 pin description shown on a picture below.
Optional Operator Panel board ET7-KEY-001 is available for ET7 controller.
We can offer custome design Operator Panel Board according requirements. Approximate price is $35/pcs if order with ET7 controller board (MOQ is 10pcs)
Open collector Binary outputs & PWN outputs
ET7 contains 11 open collectro outputs and 3 PWM outputs. Output circuit is based on Darlington transistor array ULN2003. According to chip datasheet each output is capabl;e to drive up to 500mA, however we recommend to not exceed 250mA.
ET7 contains 4 blocks of 4 binary inputs each block. 4 opto-couple leds whithin the bock has common line. Common line of each block is isolated from other blocks. It makes possible to use different power supply or mixed PNP and NPN sensors with different blocks.
Each common line can be shorted to GND by closing jumper switch, If use internal 24V DC power line to supply sensors.
Schematic design of input block is shown below.
Control computer for myCNC-ET7.
myCNC-ET7 board works under control of myCNC software. Control computer needs to build a complete CNC control system based on myCNC. It can be either standard desktop/industrial computer with Linux or MS Windows OS installed OR small single board computer like Odroid-C2, Odroid-XU4, Raspberry-Pi3/Pi2
myCNC-ET7 board contains built-in DC-DC converter and mounting holes to install and power-up Odroid/Raspberry computer board.
Standard monitor with HDMI can be connected to Odroid-C2 computer board. Screen resolution up to 1920x1080 (Full HD) supported. Fully functional Ubuntu 16.04 Linux and myCNC control software installed on the computer. NC code files can be uploaded to the computer through Wifi (Samba Server, FTP Server installed on the computer) or USB disks.
We can offer affordable 10"/15.6" screens with resistive touch to build a complete stand-alone CNC control kit.
myCNC-ET7 connection examples.
myCNC-ET7 contains galvanic isolated binary inputs, compatible with 2-wire NPN, 3-wire NPN, 3-wire PNP sensors and switchers. Its possible to use internal 24V DC or external power supply with sensors. Connection examples are shown on a pictures below.