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Topics - p00ky

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Show"N"Tell ( Your Machines) / DC-K40 Laser conversion issue
« on: January 17, 2013, 04:55:46 AM »
Hi there,
I recently got hold of one of these cheap DC-K40 china lasers, I had read many posts about them, mainly about the terrible Moshi Software, but also about how the main controller boards tends to die quite quickly. Sure enough, within 2 hours of setting it up, the Moshi software fed the machine some erroneous code, the head decided to bang its self on the bottom of the Y axis repeatedly until I managed to switch the machine off. When I started it up again it was clear the controller had croaked. The seller didn't want to send a replacement board (I don't know why) but gave me a £50 refund. Being that this was all the money I had I bought a tb6560 to control it (yes I am aware these boards have some issues too, but no money for DSP) and started to follow the instructions here.......


http://www.cnczone.com/forums/general_laser_engraving_cutting_machine_discussion/149028-conversion_tutorial_dc-k40_tb6560_blue_board_ebay_non-professionals.html

Everything went smoothly until I went to wire up the laser to fire from the Z axis. I realised that the markings on my laser supply are different. In the original tutorial he connected the "TH" on the laser supply to "Serial Pin 4"(Pin25 on LPT) but my laser doesn't have "TH". The laser firing is done from a connection marked "L"(5v) and "G"(ground I assume), when this connection is made the laser fires, in fact even the test fire button is connected here.

Here are a few Pics




I have posted on the original tutorial page and although there has been a lot of views so far, no advice has come back so far so I thought I would post here too, as you guys tend to know what your talking about too :)
I'm quite new to electronics, and all I know is what I've taught myself, but that means when I hit a brick wall, I'm truly stuck.

Anyways thanks in advance, any help would be greatly appreciated.

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