Lightobject.com Support Forum

For anyone looking to convert their Moshi laser, the following might be useful. Counting from the side of the ribbon closest to the bottom of the laser as it it plugged into the original Moshiboard. The one's omitted aren't necessarily not connected, but they're not needed.

3: 5 volts. This powers the LED in the optical sensor.
4: y axis signal. When the switch is not blocked, this will be at ground. When it is blocked, this pin floats.
5: x axis signal. See above.
6: ground. This is ground for the LED and for the side of the opto switch opposite the signal.
9-12: these connect to the stepper motor wires in the following order: red, blue, white yellow.

Unfortunately, the newer DSP wants the opposite signals. The old version seems to have been able to deal with it, but I guess someone had the bright idea of pulling a useful feature in the upgrade. I'm designing a board to fix this problem and make upgrading the Moshi a plug and play experience. It will: accept the ribbon cable, provide terminal blocks, regulate the 24V from the DSP to 5V, and use an inverting Schmitt trigger to flip the signal. I'll post the schematic up when I'm done. If there's interest, I might even get the board professionally etched and offer some for sale with the relevant components.

Great info.
I need to do this for my conversion as I don't want to add new switches and wiring on the moving bits if I can avoid it.

Do you know a part# for the ribbon connector?
How far are you from a schematic?

-Craig

Hi craig
i can tell you from experience it is better to put two mechanical switches in instead ther optical. i am using the ribbon cable and the little board what exist and just connect the two switches ( three wire ) with soldering on the little board and on the other side ( DSP side ) I soldered new wire pieces on to connect to the DSP.
in order to find the right wire just use a DVM.
you have three wire for the switches : 1 = ground; 2 = X axis stop ; 3= Y axis stop
and four wire for the x axis motor, this are two pairs .
I have converted quite e few machines and have help a few people over the net to set it up all are happy.
greetings
walt

AVRC wrote:Great info.
I need to do this for my conversion as I don't want to add new switches and wiring on the moving bits if I can avoid it.

Do you know a part# for the ribbon connector?
How far are you from a schematic?

-Craig