{"id":6798,"date":"2017-05-17T10:58:45","date_gmt":"2017-05-17T15:58:45","guid":{"rendered":"https:\/\/jtechphotonics.com\/?page_id=6798"},"modified":"2020-05-07T15:43:55","modified_gmt":"2020-05-07T21:43:55","slug":"tinyg-upgrade","status":"publish","type":"page","link":"https:\/\/jtechphotonics.com\/?page_id=6798","title":{"rendered":"TinyG Upgrade"},"content":{"rendered":"

TinyG Laser Upgrade<\/h2>\n

\"AThe TinyG project is an open source CNC control system for embedded CNC motion control. \u00a0Many people build CNC machines with this controller. \u00a0It is very similar to the GRBL controllers, but just with different firmware. \u00a0For more information check out the TinyG wiki here:\u00a0TinyG Wiki<\/a><\/p>\n

We have many customers using the TinyG with our lasers with success, so we now have decided to put the instructions up for everyone to use. \u00a0It is pretty simple to get up and running and only needs a small configuration for the PWM function. \u00a0In the end, you will have laser connected with PWM power control enabled. \u00a0Let’s get started!<\/p>\n

Electrical Connection<\/h3>\n

On the side of the board with the three screw terminal connectors there is a signal called “PWM”. \u00a0It is on the screw connector closest to the reset button. \u00a0The “PWM” terminal will be the laser driver “+” signal. \u00a0On the same screw terminal, there is a “GND” connection. \u00a0This will be the laser driver “-” signal.<\/p>\n

Here is a diagram showing these connections:<\/p>\n

\"TinyG<\/a><\/p>\n

For the J Tech Laser Driver use either the Molex Header H4 or the screw terminal H2.<\/p>\n

\"High<\/p>\n

PWM Configuration<\/h3>\n

Now that you have the electrical connections completed, you need to configure the PWM function of the TinyG.<\/p>\n

From the TinyG wiki:<\/p>\n

There is currently only one PWM channel (p1), but the configs are structured for multiple PWM groups. The PWM channel is set up to act as a remote control Electronic Speed Controller (ESC), but can be used for other PWM functions using these settings.<\/p><\/blockquote>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Setting<\/th>\nDescription<\/th>\nNotes<\/th>\n<\/tr>\n<\/thead>\n
$p1frq<\/td>\nFrequency<\/td>\nin Hz, e.g. 1000<\/td>\n<\/tr>\n
$p1csl<\/td>\nClockwise speed low<\/td>\nIn RPM – arbitrary units unless you calibrate it, e.g. 1000<\/td>\n<\/tr>\n
$p1csh<\/td>\nClockwise speed high<\/td>\nIn RPM<\/td>\n<\/tr>\n
$p1cpl<\/td>\nClockwise phase low<\/td>\n0.000 to 1.000, e.g. 0.125 for 12.5% phase angle<\/td>\n<\/tr>\n
$p1cph<\/td>\nClockwise phase high<\/td>\n0.000 to 1.000<\/td>\n<\/tr>\n
$p1wsl<\/td>\nCounter clockwise speed low<\/td>\nIn RPM<\/td>\n<\/tr>\n
$p1wsh<\/td>\nCounter clockwise speed high<\/td>\nIn RPM<\/td>\n<\/tr>\n
$p1wpl<\/td>\nCounter clockwise phase low<\/td>\n0.000 to 1.000<\/td>\n<\/tr>\n
$p1wph<\/td>\nCounter clockwise phase high<\/td>\n0.000 to 1.000<\/td>\n<\/tr>\n
$p1pof<\/td>\nPhase off<\/td>\n0.000 to 1.000 used to set OFF phase for PWM devices that are not off at 0 phase<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Ok, this all seems a bit complicated, but you don’t need to worry about most of these settings. \u00a0 We will need to now configure your TinyG board to the correct settings to run the laser.<\/p>\n

Here are the settings you need to enter:<\/p>\n

$p1frq=1000<\/em>
\n$p1csl=0<\/em>
\n$p1csh=255<\/em>
\n$p1cpl=0<\/em>
\n$p1cph=1<\/em>
\n$p1pof=0\u00a0<\/em><\/p>\n

Follow these steps to enter the codes to your TinyG:<\/p>\n

    \n
  1. Connect to the TinyG using the control panel software.<\/li>\n
  2. Click the Gcode tab (upper left)<\/li>\n
  3. Enter PWM settings line by line in command line prompt on bottom of screen<\/li>\n
  4. Confirm settings after each line, they will be echoed above<\/li>\n<\/ol>\n

    \"TinyG-JTechLaser-PWM-settings\"<\/p>\n

    Software Commands<\/h3>\n

    Your commands for running the laser will be the same as the spindle on command with RPM. \u00a0It is:<\/p>\n