Dimensional Print Studio


CETUS2 UPS3 3.2.5 Update

Still working with CETUS2. Loaded the UP Studio3 (UPS3) update (3.2.5) a couple of weeks ago. The big changes were obvious such as the addition of the “Paint” function for adding color to mono .STL files.

What is not obvious are any changes in background system operations (code changes) with existing variables and operational algorithms.

I won’t give specifics as I have received no official information or confirmation on what has been changed (improved).

As you need to know, my CETUS2 is a prototype and not the same firmware or hardware as the pending production unit. Main reason I won’t give specifics.

With the new release of UPS3 The method of assigning “Entity ID” has substantially changed. It’s a method of assigning specific printing tasks to specific nozzles. A very handy features but it’s inter-reaction between the three available extruders is not an absolute.

Many variables in UPS3 are not absolute. I still haven’t found a way to get descent support separation from undersurface supports. There is a variable called “Support Peel / Bond Strength” that should do the job but has absolutely NO EFFECT on undersurface support bonds. The bonds are always 100% solid in my experience.

With the new version 3.2.5 of UPS3 I began to experience under extrusion from Nozzle2 (the left side). I thought it was partially plugged. Now, that doesn’t seem to be the case.

Jason in CETUS2 support told me when I first received my CETUS2 to set the extruder flow for EX#3 to 0.5 to produce a 50/50 mix using that extruder. With extruder #3 NOT SELECTED, it still influenced the flow in EX#2 with the new UPS3 3.2.5!  I set flow back to 1 when not needing/using EX3 and flow from EX2 came back to near normal. Something changed between the UPS3 versions. 

I have just tested and proved setting flow to 0.5 in EX3 is no longer necessary for 50/50 prints. Just completed  excellent blended 50/50 vase prints with flow for EX3 set at 1. (see lead picture) The coaster is also a new 3.2.5 print.

No idea if this will be the S.O.P. but it works for me at the present time. I don’t expect any hard “how-to” instructions until the release version of CETUS2 hits. Jayson is the official source for that.

Simplify 3D

I have written a CETUS2 config file for Simplify3D (S3D). My Simplify3d sees the CETUS2 as a USB modem on the USB line but can’t connect. GCODE files must be saved and loaded to CETUS2 using UPS3. Just like the original Cetus.

After loading the file to print, I see bed temp and nozzle temps come to set point and the print head travels to the correct start and begins the print.

The skirt outline prints and the base outline prints fine. The base infill begins (and looks proper) but then the CETUS2 just stops everything and freezes. It's like the only data saved was in the USB receive buffer. No file storage.

Stop print from the control panel works and I can move the head back to home. 

The system is acting like it hasn’t stored the complete gcode file in the machine or the uSD card. It just crashes about 100+ lines into the gcode,

Looking at my created GCODE I see no reason. The initial start codes must be correct as the run code to where it quits is is all basic X. Y, Z, E position commands.

Could be my CETUS2 hardware/firmware is not yet coded for for storing large “.gcode” files. Just the UPS3 “.tsg” version. But it does start and run fine for a few hundred lines, and lays down some plastic on the build plate.

I can see where we will loose all of the special functions from the UPS3 slicer. But that’s the price for using generic gcode. I will still love to experiment with S3D and expect I will be able to produce some very tightly controlled dual filament prints. 

I will have to wait and see how the release version of CETUS2 will handled S3D .gcode files. I think I have a good start with my current S3D CETUS2 configuration file. Will have to see if Tiertime or Simplify will produced and “official” config file.


Oh yeah, CETUS2 can print TPU! TPU is Thermoplastic Polyurethane, a rubber type substance. It is very flexible, but not extremely difficult to print once the printer configuration is properly set. 

The CETUS2 direct connect filament drives are a good printer feature for the use of TPU. TPU filament is much like a round 1.75mm section rubber band. Let’s just say it will wiggle. 

Read more: Can CETUS2 TPU?

CETUS2 User UPDATE 5/9/2022

I am very satisfied with the two color operation of my “prize” CETUS2. Most know it was a New Year’s Wish reward from Tiertime. A pre-release edition of the new CETUS2. 

The hardware meets all my expectations and will be improved in the production release. Things like the video display, dual processors, replaceable nozzles, and wire and cable routings will be some of the changes. Tiertime has already given notice the new version will look a bit different.

Read more: More CETUS2 User Thoughts

MayDay, only becaue it is May1, 2022. No distress, yet.

CETUS2 (production) is coming along very slowly. I am so blessed in a non-religious way (ok - lucky) to have a pre-production version with which I can play. I call it play because I have no instructions. I just learn by playing. It works for me.

I am able to create very decent prints. I have had prior experience with single nozzle dual and triple filament printers. So I know what to expect.

Read more: MayDay CETUS2 

First PETG print on my Cetus2

Using my trusty "dented.stl" model file. I decided it was about time to experiment with other filament types. I have some PETG transparent red and blue that I loaded on the Cetus2 feed system.  For this print I ran Nozzle3 (the 50/50 mix) at 240C and a layer height of 0.25mm. Speed was set to "normal".

The print looks quite good with very even all around deep purple color blending and no evidence of nozzle "color position stripes".

I had to create a new material file for the PETG and manually configure it into every master file (4) that I have created. Then from there, copy once into the Wand material files out of a created .TSK file that was configured using the PETG material defininition.

Material configuration is still a poory implimented clumsy function within UPStudio3. It should be a one time one place configuration process connected to any routine (including WAND) that needs the data, Making any later adjustment means going back to every location it is stored and doing a separate edit. Very poor practice. I hope this is on the improvements list.

I have also noticed that UPStudio3 no longer appears on the the Tiertime site as available software to replace the standard UP Studio used on all other printers. I am assuming UPStudio3 is being especially configured for CETUS2 use only.

However, I can find other than CETUS2 printers in UPS3 after adding a .stl file and checking the printer listing again. 

This is the first 2 color 3D print I produced using the new UPStudio3 (UPS3) version 3.2.5 using the “Paint” command. 

The original .STL file is a once piece, single object file I named “dented”. Other examples of this print can be found in the blog. The colored areas here are selected with UPS3 with the “Paint” command selected within the floating drop down menu.

Screen Shot 2022 04 23 at 125825 AMThe cursor is used to select flat enclosed areas in the drawing within selected angle ranges. I am not yet fully aware of everything this command will permit in selection as this is my first attempt and have not seen nor received instructions.

I chose to use the purge tower as I wanted best results with this first print. I do believe the “shadow” (no tower) option will also work. I will try a print using that option later.

I posted in the kickstarter forum, there are several more print options in this new 3.2.5 release. The print extruder Entity ID can now be selected in the “Special” command tab assigning print function to specific nozzles. That was not used for this print.

Read more: UPStudio3 V3.2.5

As you (must) know by now, the Cetus2 3D printer shown in this blog is a pre-production version. Many detail changes have already been announced for the production unit. 

I have a new production Cetus2 on “reward” status with Tiertime. It may be delivered in late May or June of 2022. That provides time for design change and improvements to continue. I suspect it is mostly a build material supply issue as Covid-19 (et al.) slows deliveries.

No problem for me. I have a working Cetus2. It does give me a chance to offer first hand user experience and suggestions to the Cetus2 build team.

Read more: Cetus2 Feed Guides

The lead picture is four, two color coasters all printed together. One does not have to look too close to notice there is no change color purge tower. 

I really like the complexity and color blend in this design. So I decided to print four-at-a-time before I made a filament color change. Oh, yeah, that and also just because I could.

If you are not familiar with single nozzle multi-filament (and color) FDM printing, A purge tower is a structure on the build plate where the printhead travels to figuratively “blow its nose” when changing colors. 

Read more: Just Coasting

Two Color Blend

Just created a new print combination on the Cetus 2. Combining nozzle one and nozzle three using a shadow purge. Nozzle one is a single color and nozzle three is a 50/50 color mix.

When nozzle three is in use for a print there is no possible way to use a purge tower. When flowing two colors 50/50 blend at the same time, the designers thought there would be no need for a purge. The purge tower function was therefore never programed In UPStudio3 to purge with nozzle three in use. (I know Cetus2 designers are re-thinking this limitation.)

Read more: Two Color Blend

I decided to get back to reality with the two color printing of my pre-release Cetus2. I have spent considerable time experimenting and exploring the alternative methods of purging the color from the nozzle. This was like poetry in printing...

That exploration includes standard purge tower, purge tower internal to the model outline, On The Fly (OTF) color change, and what I call shadow purge using the interior fill of the print. They all are possible and all work to a certain degree of perfection. The one to use is a matter of choice and need.

Read more: Ode to Purge

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