LAOS Laser

h1. HPC LS3020 connections - July 2012

{{>toc}}

h2. Wiring diagram

Here is a schematic diagram of how everything should be wired up (see message#26):

!LaOS-wiring.jpg!

h2. Laser ON cable

The laser-on cable, as it comes shipped with the laser cutter needs to have one wire switched over, from this:

!DSC_3499.jpg! ... to this: !DSC_3500.jpg!

It then plugs into the mainboard like this: !laser-on.png!

h2. Disabled laser PWM

To get started fast, just run the laser without PWM support - you can accomplish the same by manually turning the front-panel potmeter back to reduce the power.

With the July 12 power supply, you're done. To disable PWM on the older power supply, make sure the D+ and D- pins are jumpered on the power supply:

!DSC_3645.jpg!

h2. Y stepper cable

The Y stepper cable (with a 4-pin JST connector on the end) may be too short to reach the proper socket on the [[LAOS mainboard v0.3]] - this can be solved by manually splicing some extra wires, to extend it by about 15 cm:

|Color|Signal|Connect to|

|RED|XA+|J18.2 A|

|BLUE|XA-|J18.3 A|

|YELLOW|XB+|J18.4 B|

|WHITE|XB-|J18.5 B|

!DSC_3647.jpg!

h2. Flatcable for X stepper and endstops

|_.Pin|_.Signal|_.Connect to|

|PIN12|XA-|J24.1 A|

|PIN11|XA+|J24.2 A|

|PIN10|XB-|J34.3 B|

|PIN9|XB+|J34.4 B|

|PIN6|COMMON|J34.4 GND|

|PIN5|XHOME|J34.2 XHOME|

|PIN4|YHOME|J34.3 YHOME|

|PIN3|+5V|J34.1 Vsensor|

!783px-HPC-flat-cable-pinning.jpg!

h2. Stepper driver orientation

Be *very* careful how you place the stepper drivers on the mainboard. Mistakes can blow up both the stepper driver _and_ the mbed controller!

Here is the proper orientation for the purple "StepStick" drivers, with heatsinks mounted on top of the A3984 driver IC's:

!stepstick.png!