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Topics - Landbo

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General Discussion / Some measurements of output power on my k40.
« on: November 28, 2017, 04:00:50 PM »

Max output just after the tube is 37.5 Watts at 22 mA.
The power measured after the tre mirror has dropped to 27 Watts, a loss of 10.5 Watts, which must give you a total loss of 100-(27/37,5*100)=28% in the tre mirrors (I hope my calculation is correct!). The loss is significantly greater than I expected. Has not measured the loss in the lens, which I do not expect is quite big as it do not appear to get hot during operation.

Next project will be measuring the linearity of the tube, which I expect has a strong crack about 50% of full output power.

The story continues.

Regards, Leif.

General Discussion / Holey smoke, cohesion3D mini board and K40 !
« on: October 23, 2017, 06:00:23 AM »
Finally, my cohesion3D mini board came and was inserted into my K40. Everything seemed to work fine except controlling the laser. Can turn the laser on and off from the "jogging panel" but when I send the G-code file to K40, it starts emidentelig with laser ON and keeps it on all the time until all the g-code has been run and the laser head has returned to home. What's wrong ?    :-\

Regards Leif.

General Discussion / K40, which edition ?
« on: October 16, 2017, 02:33:22 AM »

Have decided to buy a K40 cutter/engraver from eBay. It is available in two versions, one with a digital readout and a cheaper analog. Since I want to turn the machine into G-code, my first imprint is to buy the analogue. Is there anything i overlook or ???   

All good advice is received with pleasure. Leif.

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