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--- tech:laser [2015/01/01 21:56] – created bullar
+++ tech:laser [2015/01/01 22:16] (current) – [Differences to former posts] bullar
@@ Line 11: / Line 11: @@
 ===Laser Power===
 My laser cutter hosted a MY JG40W power supply with PWM power control input.
-Laser PSU
+{{:tech:laserpsu.png?direct&300|}}
 I used the following connectors:
@@ Line 30: / Line 30: @@
 Laser power controller
 Here the actual system is much more modern and supports a digital power adjustment in 1/10, 1 and 10% steps (but still suffers from missing link to main control board).
-The board is called 6C6879-LEDPAD-A. It was replaced by an I2C-Panel of LAOS
+The board is called 6C6879-LEDPAD-A. It was replaced by an I2C-Panel of LAOS.
-LEDPAD
+{{:tech:ledpad.png?direct&300|}}
 The new control panel
 I added a LED showing the laser activity and a button to trigger the laser. The rest is supported by I2C-Panel. The front design file (SVG) is attached.
-Control panel
+{{:tech:img_0129.jpg?direct&300|}}
 Signal integrity issue
@@ Line 42: / Line 44: @@
 The picture shows the signal at optocoupler (reference in yellow is the transistor output w/o optocoupler).
-PWM signal integrity
+{{:tech:pwm_signal_integrity.png?direct&500|}}
 Therefore I decided to build a level shifter unit. With an op-amp (TLC271) the level at the optocoupler is judged at approx. 3V (with few 0.1V hysteresis). A following schmitt-trigger
@@ Line 49: / Line 51: @@
 The level shifter soldered on a small PCB:
-Level shifter unit
+{{:tech:img_0130.jpg?direct&300|}}
 New exhaust hose adapter
@@ Line 56: / Line 58: @@
 The part can be found on http://www.thingiverse.com/thing:454820
-Exhaust hose adapter  Foam tape side  Duct join side
+{{:tech:img_0445.jpg?direct&200 |}} {{:tech:img_0443.jpg?direct&200 |}} {{:tech:img_0444.jpg?direct&200 |}}
+----
+**My Laser cutter after all modifications (until m/o Aug 2014)**
-My Laser cutter after all modifications (until m/o Aug 2014)
+{{:tech:img_0133.jpg?direct&300|}}
-Laser cutter (final)
-I think I have the same machine, made by 'ecpur' and bought on ebay. Another useful addition is a 2A fuse in the mains connection, my machine had very thin wires. Also be careful with the 220V input to the power supply: the green connector can be plugged in reversed, which will short one of the power lines to the metal frame. I did this and the fuse saved me from bigger trouble. - joost
-laserPSU.png - Laser PSU (2,307 MB) bullar, 2014-08-24 22:13
-LCD panel.dxf - LCD panel design (8,589 KB) bullar, 2014-08-24 22:13
-IMG_0133.jpg - Laser cutter (final) (751,652 KB) bullar, 2014-08-24 22:13
-IMG_0129.jpg - Control panel (1,014 MB) bullar, 2014-08-24 22:13
-IMG_0130.jpg - Level shifter unit (958,597 KB) bullar, 2014-08-24 22:13
-PWM_signal_integrity.png - PWM signal integrity (251,799 KB) bullar, 2014-08-24 22:13
-Cover Laser Panel.svg - Control panel design (101,755 KB) bullar, 2014-08-24 22:13
-ledpad.png - LEDPAD (1,299 MB) bullar, 2014-08-24 22:13
-IMG_0445.jpg - Exhaust hose adapter (2,869 MB) bullar, 2014-09-07 13:38
-IMG_0443.jpg - Foam tape side (2,047 MB) bullar, 2014-09-07 13:38
-IMG_0444.jpg - Duct join side (1,771 MB) bullar, 2014-09-07 13:38

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