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An alternative to buying a bad kit for $300-500

Re: An alternative to buying a bad kit for $300-500
February 11, 2019 03:57AM
I wanted to post this here, this thread has been helpful for me while developing my new project:

A 32bit controller board for the CubePro

[reprap.org]
Re: An alternative to buying a bad kit for $300-500
March 15, 2019 08:00PM
Nearly finished my Cubex duo reprap mod.
Using a Tango (modified version of Rumba). With DRV8255 drivers (6 of).
I re-used all existing wiring, just new connectors on the board end, and also reused the sensor boards and the existing breakout board on the carriage. Have E3DV6 style hotends but kept the original fans (two of the cheap 24 fans that came with the hot ends packed up within a week). Only one extruder in the center position.
Have reused the USB ports on the front and have used the Cubex filament run-out sensor (didn't bother with the filament movement sensors, although I believe the latest marlin may be able to use those too).
Have added micro switch Z end stop. Used the 6th driver (extruder 3) for the second Y axis stepper.
BL Touch style auto bed levelling.
24v Heated bed using the Ultrabase glass. For now I have gone with a 220x220 because that was readily available and cheap from amazon.
Am using Marlin 2.0 and Octoprint although I still print from SD rather than from the Pi. I have a webcam fitted to the back Z bracket that gives me a great view of the print from my study. Printer is in the basement.
Using Kisslicer and apart with problems with some cheap filaments from amazon, am now getting reasonably good results. Much better than I am getting with my other stock Duo.
Last couple of jobs (for now) is to print some hinges and cut some acrylic to add some doors to front and sides.
Although I have already been sidetracked into printing the parts for my next project - a MPCNC.

Edited 2 time(s). Last edit at 03/15/2019 08:08PM by jimboh3.
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Re: An alternative to buying a bad kit for $300-500
March 16, 2019 09:03AM
Nice work, I hope you get a lot of fun with it.Its a good base to start from to make a 3D printer, now you made it much better.thumbs up

Edited 1 time(s). Last edit at 03/16/2019 09:03AM by fg dude.
Re: An alternative to buying a bad kit for $300-500
March 17, 2019 08:16PM
Hello everyone.

Ive bought a couple brand new Cubepro Duos to modify them and they should arrive Thur. I was just wanting to ask if anyone could let me know the LCD diagonal touch screen size is so that I can order a tft24, tft28, tft32, or a tft35 to arrive at the same time as all the other parts ive ordered.

Thank you in advance.........
Re: An alternative to buying a bad kit for $300-500
March 28, 2019 12:16PM
Hey folks, long story short,

I have the opportunity to fix up a cubex trio at the local school of nursing.

Been thinking of converting a stratasys and cubepro to take spools for daily use for awhile.

He has already disabled extruders down to 1, wants to use spools, different interface/slicer and in heated boro bed.

Here is my plan of actions:

1) read more on various discussions here.
2) swap out electronics for duet.
3) sterilize carriage, add in Chinese extruder.

I want to move forward fail cheap fail fast style, to push things forward without altering the printer too much.

We'll think of adding in a better extruder and heated boro bed if above turns out useful enough.

What do you guys think?


Huge thanks to all here for the combined efforts!
Re: An alternative to buying a bad kit for $300-500
March 28, 2019 12:37PM
The bed that's in it works fine, the extruders and hot-ends suck. Use Elmer's purple glue stick instead of the stuff that came with the printer. It's less messy, easier to clean up, and works fine.

I'd focus my efforts and $ on the controller board so you don't need proprietary filament cartridges and using a better extruder/hot-end. The E3D Titan and V6 hot end are OK, but short (the original hot-ends were pretty long) so you might need to adapt the extruder carriage or add an extension tube between the extruder and hot-end to make it work. The BMG extruder and E3d V6 hot end are a better combo., but again, you will need to lengthen it to make it work.

I've been using a Chinese hot-end in my printer for about a year and it has performed well. I did end up replacing the crappy fan that died pretty quickly with a good one (it didn't like the 50C chamber temperature when I print ABS). The fan mount is an aluminum bracket screwed to the hot-end heatsink. Unlike the E3D V6 set-up, the fan mount does not come loose, rotate, or melt.

I'm not a huge fan of the Chinese extruders, and no longer care much for the Titan. Too many problems. I put a BMG in my printer a few months ago and it fixes all the Titan's problems.


Son of MegaMax 3D printer: [www.instructables.com]
Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]
Re: An alternative to buying a bad kit for $300-500
March 28, 2019 01:18PM
Yeah not too concerned with the bed for now, thanks for mentioning it.

Saw a cheap bmg clone on amazon I was going to try.

Thanks a lot for confirming controller and extruder choice.

I'll talk to the person in charge again, order some parts.

Btw they are doing cool stuff with the printers, assistive tech, prosthetics...


Huge thanks to all here for the combined efforts!
Re: An alternative to buying a bad kit for $300-500
April 04, 2019 12:08PM
I only use one E3DV6 on my modded Duo. It is in the middle position and I use the Duos extruder fan mounted on its bracket (with screws) and have a BL touch probe mounted to what would, on a trio be the third extruders bracket.
That is after both the chinese e3d small fans failed. The Cubex fans are better quality. I have had not problems with cooling with PLA. Haven't tried ABS yet.
I use a Tango (aka Rumba) that has 6 DRV8255s so I drive the second Z off E1 and E2 is spare.
I get very good prints at 2mm layers, the only issue being I sometimes get what looks like the layer is shifted in one direction by a fraction of a mm and continues from then on the same. No loss in strength as the layer adhesion is good. Wondering if this could be the step loss issue with the 8255s. Might try Some of the newer more expensive drivers later but am building a MPCNC at the moment.

Re the heated bed. I bought a 220x220 Utrabase heated bed and glass bed for $40CAD from Amazon (even cheaper for those of you in the states) and it's a huge improvement. So long as I heat the bed a good 5-10mins before hand (depending on model size) to allow the whole bed to reach temp, adhesion is great and no more glue.

I originally bought 1 working and 1 blown motherboard Duos for $250. I converted the faulty one. I was going to sell the worker, but I am now considering converting that one too and going for 3 Bowdens and a triple Diamond Hotend..... More fun!

I picked up a Monoprice Select Mini V2 on Kijiji for $100 including a new spool of PLA. Guy couldn't get it to print, turns out he had bought a couple of chinese E3D hotends but they were too long so he had like 3/4 inch of heat break/throat between heater block and heatsink so was getting jams in the break.
I moved the z endstop and made it adjustable so the nozzle would reach the bed and now it prints great. Its small and fairly quiet so that one stays in my study.
Re: An alternative to buying a bad kit for $300-500
April 06, 2019 01:27PM
Here is a print I did this morning on my Cubex Reprap for my CNC.

Re: An alternative to buying a bad kit for $300-500
April 18, 2019 12:48PM
I have a second Cubex Duo that is stock except mods to allow normal filament. I am considering reprap'ing that one too and this time go for a triple Bowden solution with a Diamond triple (3 into 1) hot end.
I have been thinking about further weight reduction on the center carriage. Anyone considered (or even done) removing the aluminum carriage completely and replace with a 3d printed carriage? Would cut weight down a lot I would imagine.
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