18. November 2012
Geeksbase Ramps PCB V1.3
This is our new complete electric for the reprap printers on one PCB. Base is the arduino mega!
We changed some things to make a better reprap-pcb.
The PCB can manage two extruders!
All traces are bigger to provide a better current flow!
On the whole pcb we designed a “hatch”. The effect of the hatch is that the whole PCB works as a cooling element! So all generated heat discharge perfect and the operating temperature stays in a perfect range.
All screwed contacts where replaced against male/female connectors.
So you could change the whole electric and single parts really fast. We dont use many SMD-parts. So the stepperdrivers are replaceable. We only deliver the Pololu A4988, which has a automatic overheat-automatic
With the Arduino Mega as base its possible to build reams of addons. (like display, keyfield, etc.)
3. November 2012
Today how to assemble our Hotend in V1.0.
First you need all parts of the Hotend:
Screw everything loose together. Then take the wenches to screw everything tight.
Be careful and remember after tight comes loose.
Now take a bench vice. Put some filament into the peek-isolator to avoid squeezing the isolator together! Although take a piece of paper to make sure that the isolator don’t gets damaged.
Now where everything is fixed you need the heat-resistor and the temperature sensor.
I isolate both with kapton. So i could be sure tthat there is no short in the circuit.
Ready for use. Some tips for starting the hotend for the first time, i will give you in a few days!