Dimensional Print Studio

KautzCraft

Not an earth-shaking Cetus2 post. Just keeping my mind busy and protoCetus2 busy doing SOMETHING other than waiting... :)

This is Tweety. I posted her/him on T-Verse long ago. https://www.thingiverse.com/thing:2951665  

I wanted to see how a 150 micron print would do on the Cetus2. Not too shabby.

Tweety is a low-poly sculpture and lots of support. So we don't have a perfect surface. Don't blame the finish bumps on Cetus2. That's not the point. I wanted to see how printing with 0.150mm layers and the 0.40mm nozzle would get along. Absolutely no problems is the answer.

This Tweety was enlarged to 150mm height. Print time 8 hours at "normal" speed. 63.4 grams finished weight. 74.5 grams predicted because of support. 3 perimeters and 20% infill. I don't DO super light infills.

This is a 50/50 mix (nozzle #3). Light and a darker yellow. At this resolution the color mix is very complete as I can see no shading around Tweety.

Tweety is having a "puddy-tat" discussion with a couple of Grumpies.

IMG 1903

Made several brackets for cable management on my prototype Cetus2. None are absolutely necessary. They are aesthetic and just “tweak” cable management a bit. The newer Cetus2 have changed some of the cable routing and may not need to add these to my new version. Whenever I get it…

Read more: Cetus2 Brackets

Open Letter to Tiertime Cetus2

As everyone can see on this blog, I am an actual user of an early prototype of the Cetus2 dual filament single nozzle 3D printer. I am simply lucky and grateful to have an opportunity to show it to readers of this blog.

I do NOT represent Tiertime and the Cetus2 (and UPStudio3 (UPS3)) teams in any official way, shape, or form. I simply show what I can make with the Cetus2 I won in a New Year’s Resolution writing competition.

I do not have two machines (yet) but I am a KickStarter investor the same as everyone else on the KS forum. I hope to have two in the future...

Read more: Open Letter to Tiertime Cetus2

CETUS2 Grass Bowl

I created a project candy bowl similar to this several years ago. But it had vertical sides and smaller grass blades.  I also used a different multi color FDM printer than CETUS2 to produce them. This is an update!

Cetus2 KickStarter recently released new pictures showing the reconfiguration of the design back towards the original conception. Cetus2 is  back to the look of the early release version I am privileged to own here at KautzCraft.  In those CETUS2 pictures I notiiced the brand and color of the two spools of filament on the display machine. They are eSUN Satin PLA, purple and yellow. 

Read more: CETUS2 Grass Bowl

Time for a nozzle change?

Not really needed as the original CETUS2 nozzle is still doing just fine. But it is permanent and can not be removed from the extruder.

But, CETUS2 shipped me the new extruder with the replaceable nozzle! Gotta take it for a spin and a few hundred prints (or more). 

Read more: Nozzle Change

Some confusion about the free end of a Z axis lead screw became apparent on the CETUS2 Kickstarter forum when the printer backplate was shown removed. The intuitive reaction from some members was the end bearing was missing.

I’ll get to the point. The free end Z axis lead screw is NOT a problem as far as function. It is a BEST-PRACTICE (in this application) to not have a fixed bearing at the non-driven far end. Light weight lead screws this length are seldom PERFECTLY straight, but are functionally straight. They need slight wiggle room at that far end.

On some CNC and 3D print machines with exposed screws, the end will be protected from deflection by a NON RESTRAINED free floating bearing. Just in case the exposed screw is impacted by flying debris or user contact action. Concealed screws need no such deflection guard.

My Anycubic Vyper has two exposed Z axis screws with floating deflection guards on the ends. As do my two Geeetech 3D printers. I can grab the free ends and they will slightly wiggle.

A rigid bearing on the non-driven end is not a “better” design. However, some heavy duty machine tools (like a metal cutting lathe) will have substantial bearings on both ends of their (also substantial) lead screws. They must deal with high thrust loads and are often *driving from both ends*. (Manual and power feed)

On the CETUS2 without the backplate, the Z axis screw is far too exposed to accidental contact and deflection bending. An end deflection guard is an extremely good idea. With the backplate in place there is some protection for the screw. A user could print a top deflection guard bracket and attach to the backplate. 

CETUS should consider adding this deflection end guard. It isn’t necessary for normal (no touch) operation. Professional operators know this. But the screw is still accessible to any and all user contact and perhaps become damaged when moving the machine and grabbing the wrong part. The copious grease on the screw is a clear no-touch deterrent to most aware users.

Now you know. Far end bearing not required, but a far end deflection protection guard is good practice when the screw is accessible.

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.

Read more: CETUS2 UPS3 3.2.5 Update

Can CETUS2 TPU?

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

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