A quick espresso cup design that can be spiral printed - haven't had time to test the design yet, the Robox sample is being used by Peter at the moment!

3D Printed future: Designing for Spiral Printing

By | Chris Elsworthy Design Blog, Prototype Build | 5 Comments

Over the weekend, between taking the kids to birthday parties (Happy Birthday Addy!) and clubs, I experimented with Robox and spiral printing. Having downloaded the obligatory vases and sliced them using the Slic3r experimental spiral print function, it was really quick to get some good results and I was pleased with the performance of Robox. After getting bored with vases, I CAD’ed up a Robox version and printed it, which was good but left me thinking there must be more to spiral print than vases…


Vases 100mm tall, 0.15mm layer height, 1mm wall printed using the 0.8mm nozzle.

The quality of prints were fantastic, in-fact some of the best surface finishes I’ve seen from a 3D printer, but what I was most impressed with was the speed and ease they were produced. One of the benefits of Robox is that due to it’s large nozzle (0.8mm), we can print a single outside perimeter that is 1mm thick, meaning great quality rigid prints, fast.

Why can’t everything be this easy to print?  –  We need to start designing products and parts that take advantage of this new manufacturing technique – I don’t just mean orienting them in the build chamber and slapping a flat bottom on so the part will stick to the bed, but really designing things that can be better if made with a 3D printer. One of the things we’ve been printing a lot in the office is a whole lot of espresso cups (don’t ask why, you’ll find out later) which are taking ages… but spiral printing could not only make them quicker to print but also have a better surface finish and introduce more features. Why not design the cup so each layer has a single profile, handle and all, and vary the wall thickness where needed? You could even have an inner and outer wall like a Thermos flask to keep your coffee hot and the outer surface of the cup cool.

Welcome to the new Robox site

By | News | No Comments

Welcome to our new site!

We are very pleased to be able to show off a new product we are developing, its not just a 3d printer.

Please have a look around, there is a lot of information on here already that has not been made public yet. There a lot of other products that we designed and have manufactured available here www.cel-uk.com

Thank you very much to Simpleweb in Bristol for their fast work in getting this site up. These guys went the extra mile (and a bit) allowing us to concentrate on the development of Robox.

There is a lot more to come, keep checking back and subscribe to our newsletter for more information. Please share what you find!

If you notice a problem please let me know by posting a comment below.

First prints on our prototype

By | Prototype Build | 2 Comments

We have been printing with the first complete prototype, the results are very promising. In fact the hardware is working just as we imagined it, just a few tweaks to improve the speed, the accuracy is spectacular!

Every imperfection in our test prints is just down to tuning in the print parameters. Between the software and firmware we can set everything we need too thanks to Ian and Ben W’s hard work. There is still a lot more work to do to make all this control accessible to Robox users.

Our intent is to allow the user to simply press print and get a good result every time. The building blocks are in place and we now have complete control of every aspect of the print process, now its time to tune the system.


Exciting times! – Robox® Dual nozzle 3d printer prototype testing

By | Prototype Build | 2 Comments

I’m watching over Chris Elsworthy’s shoulder – actually under his armpit…he is a tall man – while eating my lunch.

There is a definite sense of excitement in the office.  We are usually heads down working hard to bring the many elements of Robox from plan to reality. Right now though, everyone is watching Chris’s desk.

Following closely behind some unrepeatable language and burned fingers there is a print happening in one of our prototype Robox dual nozzle 3d printer units.
This print is the first of its kind, not the content but the method. It has come from months of work on electronics, firmware and software as well as a very simple but ingenious mechanical nozzle change system.

2 different size nozzles operating on a single set of instructions to build an object. Using the fine nozzle for the outline and details while using the large nozzle to fill the parts. There is a lot of fine tuning to do but the test print I can see is progressing really fast. Hours of sketching, theory, coding and design have finally come to this AND ITS AWESOME!

Chris E, Ian H and Ben W, nice work chaps.