Open Source Stratasys Conversion
This was a long painful process, now that I've done the hard work it should be fairly easy for anyone to do this conversion. I'm not utilizing the stock hotends, they are designed for use with PC-ABS and other high temperature materials. At the moment I don't need dual extrusion, or the proprietary filament system which is far too complex. The results of this conversion is printer that makes consistent, strong parts with minimal effort.
If you plan to use the heated chamber above 40c you will need a water cooled hotend and extruder. I recommend using a Bondtech BMG - The Titan extruder was a nightmare, it requires disassembly to clear jams.
I recommend using a Ubis High Temperature hotend - 24v 90 Watt with a PT1000 and Thermistor Ubis Hotends
Stratasys uPrint, uPrint SE / Plus
Discussion Duet Forum
Ideally you want to use a board with decently powerful stepper drivers. Something in the 2amp range is preferable
-Pros Best option that matches the stepper drivers Sensorless Homing means no need to wire endstops Macro system is necessary for the extra features
-Cons Display firmware doesn't support rotation of 90degrees Expensive
-Pros Use any board or combination of boards you want Super Fast Printing High Accuracy Customizable Macro Support
-Cons Requires a raspberry pi or other embedded system
-Pros It works that was the first option I used on the uPrint
-Cons Must be compiled and flashed every time you make a small change Most boards don't have stepper drivers that are powerful enough
The stock bake oven runs on 120VAC. Use an AC Solid State Rely to control the two heating elements. Keep in mind the heating elements can be wired for to operate at 120v ot 240v parallel or series.
It is important that the fans spin whenever the heaters are energized.
Make sure the heater safety shutoff switches operate correctly, If a fan stops spinning the heater will overheat without the shutoff switch. Do not remove them.
This oven gets very hot under operation, I noticed the soldier on the OEM optical endstop PCB had melted and dripped down the board. Operating Temperature 0c - 75° C (167° F) Max
Heating
2x 120v DC 400 Watt (B075 CAT NO. FS2001G102) - Build Chamber Heaters one on each side
2x 24V 0.48A Radial Blower Fans (blows air through the heating elements)
Cooling
1x 24V Radial Blower Fan - Blows room temperature air onto the printhead and part from outside the build oven.
Depending on the model you may have more usable build area than what is immediately evident. The standard uPrint has a 152x152 build plate. However the printhead can reach outside of the build plate area to access more unused print volume. I believe the standard uPrint can accept two sizes of build platforms.
Factory Specs uPrint 254 x 254 x 305 mm (10 x 10 x 12 in) Dimension SST 1200 SST X:254 Y:254 Z:305
Actual Build Volume uPrint X152 Y152 Z160
Max Travel uPrint X280 Y262 Z150 1200sst X:237.162 mm (9.33 in) Y:265.613 mm (10.45 in) Z:330.2 mm
End Stops Use StallGuard sensorless homing and avoid all this madness, otherwise there are 2 optical endstops on each axis.
However another method is to tap into the test points the power distribution board if not already removed for the endstop signals
X-Min Y-Max Z-Max
Steps Per mm at 16x Microstepping These seem to be accurate for the uPrint M92 X106.66 Y268 Z1011.99 E417 Z axis threaded rod is Imperial
Hardware XY 3mm belt pitch - 12mm GT3 Belts 16mm Linear Rods
Belt / Gear Ratios uPrint X 16t x 60t x 20t (motor 16 tooth pulley) - (60 tooth pulley) - (20t drive shaft belt) Y 20t (20 tooth pulley) to (idler pulley) Z lead screw driven through motor mounted to bed 1200 SST X (motor 16 tooth pulley) - (60 tooth pulley) Y (20 tooth pulley) to (idler pulley) Z (36 tooth pulley) to (36 tooth) to (big lead screw pitch unknown)