I need a little wiring help

[Andrew mcwherter]

I had trouble with my old controller mpc6535 so I decided to update it to the awc608 controller. After alot of research I found that it has better software and no dongle. I think I have it figured out but 1 wire I don't really know where it goes. I have G to G and IN to PWM. I just don't know where the LAS goes. I'm thinking LAS to TTL. look at the pics below and tell me what you think. thanks

[Andrew mcwherter]

old one on the left new on the right

[Gary Salisbury]

I would take this question to one of the electronics forums:

http://www.electronicspoint.com/
http://forum.allaboutcircuits.com/forumdisplay.php?f=3
http://www.edaboard.com/
http://www.eeweb.com/electronics-forum/
http://www.electro-tech-online.com/

Gary in Sunny San Diego

[Bill George]

I had trouble with my old controller mpc6535 so I decided to update it to the awc608 controller. After alot of research I found that it has better software and no dongle. I think I have it figured out but 1 wire I don't really know where it goes. I have G to G and IN to PWM. I just don't know where the LAS goes. I'm thinking LAS to TTL. look at the pics below and tell me what you think. thanks

You need an answer from someone who has wired laser controls before. Who did you purchase from and I would ask them first. I am assuming LAS is the on and off signal but I really don't know. Check here and see what you can find ..... www.buildlog.net

[Allen Rawley]

First, determine whether the laser power supply was operating using PWM or Analog control. Open your LaserCut program and check the setting as shown in the graphic below.
Lasercut_parameters_PWM_or_Analog.jpg

Analog_control_wiring.jpg

PWM_control_wiring.jpg

For the MPC6515 the pins are explained below:
Y2_pins_explained.jpg

For the MPC6535, there are additional pins as shown below:
MPC6535_Y2_pins_explained.JPG

The additional analog and Laser PWM and Fire Laser pins on the MPC6535 appear to change polarity.

My guess is that your TTL is the Fire Laser (or on/off) for the laser. You could test using your multimeter. Download an engraving job where the machine rasters back and forth. Make the raster job a complete fill of a rectangle. Then, you could see if the multimeter DC voltage reading is 5V while it is performing the engraving. You can vary laser power for the raster job, and as long as the multimeter value never changes then you can be fairly sure that you have the laser on/off signal.

[Bill George]

My Laser power supply seems to be Analog only, yet the Controller and Software support PWM. What advantage does PWM have over the other? I seem to have trouble cutting with my machine and I see references to changing the frequency of the PWM signal via the software.

Would I be better off upgrading the power supply to one that supports PWM?