Perfect Zak, thanks.
Yep, very happy bunny at the moment. All is working well. Homing switches arrived today so I'll get those fitted.
Had great success cutting that dxf in 4mm ply. 3 passes at 150mm/m. Surprised it did it so easily. Air jet really makes a difference.
I had a similar problem and found that I had to set all the inkscape units, including in the save as dialog, to mm. Then it all came in to T2 perfectly. I was editing an existing dxf from a cad system in inkscape and that may have been why the px setting didn't work, but maybe worth a try.
@Lloyd-downunder Hi, we are talking about the floating wire that is in the same connector as the power in. This is the control wire input. Floating (disconnected) is the same as applying 5v to it. Grounding it takes the input to 0v. This turns the laser off. So a signal on this wire that switches from 0v to 5 volts at say 1 second intervals would switch the laser on and off at 1 second intervals. With TTL/PWM control this is done by pin 11 of the Nano processor. If you want the laser on full all the time the signal would go to 5 volts and stay there. If you want to control the power the signal would oscillate very quickly between 0 v and 5 volt so that the average voltage to the laser is lower. You can read about PWM control on the web if interested. But to all practical terms T2 does this for you when you change the laser power.
So if grounding and floating this wire turns the laser on and off you know the laser controller is working. Then find what connector on the processor board is connected to pin 11 of the Nano board using a simple test meter (DVM) with the power off! I am guessing it will be on the connector marked "laser" Note the grounds of the processor board and the laser control board must be linked together so that the voltages are relative to the same ground.
Hope that all makes sense:-)
@vijayanands Yes, it's big, but I do a lot of custom woodwork and have always wanted to be able to draw full size templates. So having an A0 (I went bigger in the end to 1200 x 850mm) size pen plotter and laser is fantastic. I can draw the plans then even cut 4mm plywood for curved templates for routing. Getting to be a very useful tool now. Just got to build a cabinet now.
Just to make sure you are not missing a step, when Zax says to set 0,0 (work piece origin) you position the laser on low power over the centre of your work piece where you want the orange dot to be and then right click the little house icon in the centre of the axis control group. The coordinates above the icon should change to zeros. If there are * next to the coordinates, just double click them to show the work piece coordinates.
Hope that helps,
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