Changes between Version 2 and Version 3 of Maschinen/RepStrap

Timestamp:

Dec 1, 2009, 11:25:17 PM (15 years ago)

Author:

roh

Comment:

--

Maschinen/RepStrap

@@ -1 +1 @@
 == RepStrap ==
 
-see [[blog:category/reprap blogposts about reprap]]
+this repstrap is a bit different: it doesnt use any of the reprap default electronics or sourcecode on a microcontroller
 
-uses http://axis.unpy.net/01198594294 for measuring temperature
+the gcode is generated like usual via skeinforge or similar tools but emc2 and some shell and python components take control of parsing it and doing the magic.
 
-configs: http://yamato.hyte.de/tmp/repstrap_roh.tgz
+the dc-motor as visible in the pictures for the classic darwin-style extruder we currently use is driven by a dc-motor driver based on this: http://reprap.org/bin/view/Main/DC_Motor_Driver_1_1
+
+also in the same box are 2 tip122 transistors which switch gnd for 2 supplies in open collector mode.
+
+the whole thing is deadlocked with and-gates (inline in the 'step' and the pwm lines for the transistors) with the other 4 inputs of the and-gates driven from a 'charge-pump' <add schem>
+
+the chargepump gets a 'rectangular ac signal' on one input. if its missing the output goes low. if it hangs high, the same. see it as an electronic dead-man switch driven by emc2
+
+its based on some caps, diodes, more caps and 2 or 3 transistors. i'll add a schematic soon.
+
+for some pics of our extruder head see [[blog:category/reprap blogposts about reprap]]
+
+uses http://axis.unpy.net/01198594294 for the arduino code i use for measuring temperature (means the voltage)
+
+configs: http://yamato.hyte.de/tmp/repstrap_roh.tgz (for now, will move that somewhere here)
 
 FIXME: document nicely, add pictures, howto, clean up code and docs, fix heater-pid-loop Dgain, add fan on workspace? schems, layouts...