HPC LS3020 connections - July 2012 » History » Revision 12
Revision 11 (Anonymous, 2012-07-17 12:17) → Revision 12/16 (jaap, 2012-08-14 16:39)
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:
!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|
!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!