Added pics of conversion from pulsed operation to analog-voltage controlled using LM317T.HEADmaster

4 files changed, 14 insertions, 2 deletions

diff --git a/NEJE_Laser_Etcher.mdwn b/NEJE_Laser_Etcher.mdwn
index 15b2df5..d0ccfef 100644
--- a/NEJE_Laser_Etcher.mdwn
+++ b/NEJE_Laser_Etcher.mdwn
@@ -49,5 +49,17 @@ Settings copied from [this link](http://www.isolateddesertcompound.com/2015/08/2
     $132=175.000 (z max travel, mm)
     ok
 
-ATmega328 TQFP pinout:
-[[!img atmega_pinout.png]]
\ No newline at end of file
+ATmega328 TQFP pinout:.
+
+[[!img atmega_pinout.png]]
+
+# Updating to GRBL 0.9 to use PWM, reworking PCB to filter PWM and adjust an LM317T to buffer the laser voltage.
+[[!img pwm_filter_lm317t_rework.jpg]]
+
+### Results
+[[!img  IMAG0030.jpg]]
+[[!img  IMAG0028.jpg]]
+
+Using M3 to turn on the laser (spindle on) then using S0, S100, S200 (max is S1000) I could see the voltage step as expected.
+When I connected the laser, it started to get dimly visible around S160
+
diff --git a/NEJE_Laser_Etcher/IMAG0028.jpg b/NEJE_Laser_Etcher/IMAG0028.jpg
new file mode 100755
index 0000000..d8c4c99
--- /dev/null
+++ b/NEJE_Laser_Etcher/IMAG0028.jpg
diff --git a/NEJE_Laser_Etcher/IMAG0030.jpg b/NEJE_Laser_Etcher/IMAG0030.jpg
new file mode 100755
index 0000000..3b4ba20
--- /dev/null
+++ b/NEJE_Laser_Etcher/IMAG0030.jpg
diff --git a/NEJE_Laser_Etcher/pwm_filter_lm317t_rework.jpg b/NEJE_Laser_Etcher/pwm_filter_lm317t_rework.jpg
new file mode 100644
index 0000000..073f9a9
--- /dev/null
+++ b/NEJE_Laser_Etcher/pwm_filter_lm317t_rework.jpg