The Test fire button on the K40 does not work anymore because the Mini now controls the LO (laser on or enable) signal on the Laser power supply.
Turn the connector 180 degrees is the most simple solution) Test Fire button common error is Y axis moves opposite direction of the home. Then you can check the movement of the axis via the Move tab and arrows and test the direction (e.g. However when you install the Mini on the first time, you might want to disable this to debug the machine because if the laser does not auto home it throws an alarm and you cannot move the axis unless you unlock the machine via the command $X. This is important for repeat jobs that uses a jig or when you want to optimise the use of the plywood. Auto homing on start upĪuto homing is great to ensure that the zero position is always the same. When the out put of your laser is too weak because of age then you can tweak it to a lower value e.g. This parameter must match the S parameter within the Mini Gerbil although you can change it to a custom value to suit your needs (make up for aging or worn tubes). S=1000 means that when a user issues a G-code command for example G1 X100 Y100 F1000 S100 -> the S parameter here says 1/10 of the power (1/10th of 18mA is 1.8mA). The S parameter is the max power that the laser produces. It is set to default 5 which translates to 1.5kHz. The higher the engraving speed, the higher you need to set the PWM frequency via the Mini Gerbil settings command ‘$28’ (Grbl uses the $ sign as a token for configuration settings). There is a relationship between engraving speed and DPI and the associated PWM frequency. I speculate that this provides less overhead when converting coordinates into steps but not sure. So you can experiment with these settings. Set the Grid settings to mm/minįor some reason, setting the grid settings from mm/s to mm/min gives a better performance. Note: pictures of LightBurn interface are old and might differ in the more up to date versions. Even the other profiles seem to work well. You can choose Gerbil or Grbl-M3 (uses just easy Gcode).
The connection device you choose in new device is not critical. This article describes how to configure LightBurn to get optimum results. There are some settings in LightBurn that you might want to tweak in order to get the best out of both.
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