Another Stratasys uPrint retrofit

rexx

As for thew material bays you will want to run them off a momentary button one for latching the canister and one for feeding the filament from it
as it runs/feeds from a rubber wheel its not accurate in measuring it's length and the motor that drives it is only 2 wire 24vdc so no feed back

i latch the canister(button 1) then use the feed (button2) and extrude the drive motor in the head to catch the feeded filament at the head and unlatch the feed button when it purges out

the filament feed is load sprung it will not strip out the filament but also will not measure out accurately so it is best run it manually only it works great for me

the rubber wheels on the canister drives will slip if they need to not damage the filament rendering the auto load unreliable to measure the feed for an auto load
but it may work if you just over feed it as the filament will not damage if it can't be pushed any further the spring will save the filament from stripping out in any case so running the canister feed over time to assure its to the head is an option if you really want auto loads

i am in the middle of a conversion 768 sst to 6hc
my sugestions are to keep everything you can off the ssys or duet
example
Chamber fans 4x1.1A(on an 768) they run at 100% so no need to tie them into the duet ssys starts the heated chamber as soon as you turn it on fans too for the chamber

do you still need maraca ex? i have it somewhere but not sure you need it unless your on ssys platform still

also try m4 tubing to std thread fitting for using a capricorn xs tubing to the head it is better for the extruder to catch it as the ssys one is much bigger in ID and OD causing incomplete loads as the filament catches the edges of the next filament path as the inside is too big for the alignment to be accurate without a tapered guider first
if you are using the oem liquifier this mabe ok then as the oem liquifier has a feed guider before the liquifier but any non ssys down stream will benefit from the 4mm od tubing over the 8mm OD oem white tubing

could you share your chamber config.g i am having troubles with keeping the chamber to the set point using the oem J couple for the chamber even after auto tune it still calls on the ssr over the set point and never settles to the SP both on BB and pid

rexx

what i found to work best for ssys conversions
off line/manual run equipment

-Cpap head cooling fan (left rear)always on 100%
-Heated chamber fans (x4)always on 100%
-latch and load canister/filament (buttons)
-always on fans heat break ect...
-chamber lights are run off the oem side switch only
-the entire power feed is tru the oem breaker and line filter (left rear)
all off a fuse block from 24vdc power supply 21A oem

on duet
XYZE nema 23
OEM j thermo for the chamber
pt1000 hot end heats
oem end stops and oem abl
next is accelerometer after i get the chamber stable
so far play-doo prints are near perfect asa is good too but need the chamber to be stable
i may add a heated bed should i get past PC resins and others but you will only need it for materials needing over 90c builds plate as the oem chamber is 80c only and so are the components inside rated to
i have used silicone 200c wire and redone the umbilical cable incase i want to add bellows to isolate the upper gantry and upgrade the insulation to fire pillows like the SSYS titans and then 120-130c is possible in this chamber but thats for another day soon.

cheers,

rexx

768 sst liquifier available should anyone need it Model and support
msquared does them too but$$$$$
if you want to print many diffrent filament dont use this

why

1 they can't be cleaned (carbon from different materials inside induces carbon buildup more)
2. they are standard not metric
3. they wear out and are not a consumable
4.the oem extruders may not work with duet that i know and the extruder gears are likely to have excessive lash between the gears any how unless you know a julery guy that can replace them ...or a machinist willing to but is not advised without previous experiences doing so they are small and would need super precise way to produce the gears
5. the bend (90 deg) at the top of the liquifier tube is a flaw in my opinion as it is in the melt zone not before and naturally back purges a small blob around the liquifiers entrance causing even more resistance (not one of ssys better liquifiers for sure 768)

the best SSYS liquifiers are in my opinion in the titans, fortus MC and few others

straight no 90 deg bends 100watt 90-120dvc aside powered oem
the old 200watt ones on the sst and bst are way over kill for that tiny aluminum block with stainless like thin tubes but then again maybe not 120vdc i cannot remember..
(disregard if the 1200 are diff.. oh they are different chit my bad i remember now you have spring actuator from model to support side where the bst and sst have the same set height)

my question is does it feed from the top or the back hose like mine (never got to work on a 1200 only mc up)

loving all the SSYS conversions I am not alone thanks for sharing everyone

dlanm2u

@rexx I don’t usually like reviving old threads but do you have and/or know a way to get the maracaex software still? need for a dimension sst768

sebkritikel

@dlanm2u
https://forum.duet3d.com/topic/32754/can-anyone-help-with-a-copy-of-maraca-ex

dlanm2u

@sebkritikel thank you!

Electrosolz

@Pete_A Hi. Can you provide the information about Stratasys to duet interface board? Please provide the design file for it.