A little advice please.

I have got my 3DR printing nicely now but am now keen to explore building another printer with a larger print volume. I know there are extensions available for the 3dr but I'm not convinced that the rigidity of an extended 3dr will be sufficient.

Whatever I choose, I intend to use:

Smoothie based controller
V-slot rails
Octopi
FSR or inductive Z-probing
Possible upgrade to heated bed but not needed initially.

For deltas, I'm currently considering either a v-slot kossel variant or something like the Griffin.

I'm also looking at CoreXY options but I can't find a consensus on a good design to build on.

Can anyone give me recommendations for either option? The diversity of options is fantastic but makes it difficult to find a conclusion on what's best.

Thanks in advance.

adavidm

Building a new set of arms for my +Richard Horne​ 3DR. Bought a set of these adjustable aluminium rods as an experiment.

Has anyone else tried these? If so, anything to look out for particularly?

It lives! My 3DR is up-and-running nicely. Thanks to +Richard Horne for the printer design and +Jay Couture for his essential calibration video(s). 

I designed some simple add-ons to the 3DR to fit the spool, RAMPs, fans, FSR bed and LCD. If anyone is interested, they can be found on YouMagine: https://www.youmagine.com/users/adavidm although I've not had time to upload them all yet.

adavidm

My brother and I decided to have a go at lost-PLA aluminium casting this weekend. This is our first try, really happy with the outcome. Yes, I could have spent longer polishing the z-lines but a) I kind of like how they look and b)I'm lazy.

edit: Model is Woman Torso Sculpt, by Meoworks.

Any ideas what causes this detachment of filament at intersections? Steps/mm seems ok, filament diameter ok. Infill lines look a little thin too. I tried over extruding by 20% but no improvement. Could it be a blocked nozzle?

Thanks in advance.

adavidm

Does anyone recognise the dual hot-end setup on +Richard Horne 's 3DR shown in his blog post from 8th July? Knowing RichRap it's a devious device of his own imagining but wondered if anyone else had tried this setup on a 3DR. Hard to imagine fitting dual hot-ends into the tiny space under the micro-platform. I'd ask direct but I suspect I bombarded him with enough questions already....

A little advice needed please. I am building a Richrap 3DR printer and am trying to decide how to cool the cold end of the nozzle. A 40mm fan seems the most common route but I can't find any clear pictures showing how people are mounting them. Can anyone share an STL or photo of a fan mounted to a 3DR micro platform please?

Alternatively, I was looking at attaching a blower fan to the rear of the frame and ducting air through tubing to the cold end, has anyone tried this on a delta? I imagine the weight of the tube is greater than simply mounting a fan but thought it was worth looking at.

thanks in advance.

adavidm