Gina

Top front wider frame member added. I plan to add corner brackets to add to the rigidity of the frame. View from underneath (printer on its back).

Right side panel and new front rail added.

Left side panel, new front wider rail and top rail added. The printer is laying on its right side.

Looks a bit familiar

Attached the back acrylic panel - 18 M5 screws. Was very careful to preserve alignment and orthogonality.

Designed a new, smaller cover for the end of the 24v PSU with SSR and buck converter and also a new top to accommodate the bigger ultra-quiet fan.

I find I get fed up with undoing cable spiral wrap, adding one wire, and winding it up again. Then there's another etc.!!

SketchUp model of door and frame.

Just checked continuity around the anodised aluminium frame and there is NO electrical continuity! So all the stepper motors are unearthed as is the aluminium bed ATM. More wiring is needed On all three printers!! But I shall be rebuilding my Titan printer so I can just incorporate extra wiring in that. Not had any problem so far but better safe than sorry - particularly with the cost of Duet WiFi boards.

Been thinking about what is needed to complete this printer. Method of lifting/holding water tubes and cables bundle to X carriage as Z rises towards top. Add acrylic panels for back and sides. Front door frame. Front door. Tidy and secure wiring. Fume extraction. Quieter fan for 24V PSU and new case top. (Nice but not essential.)

I've ordered another of those ultra-quiet 80mm PC case fans to use for the 24v PSU to replace the 60mm very noisy one. Not only will it stop the noise but is also a much more efficient fan. OK so it needs to go on the outside instead of inside the case but that's no problem. Another possibility might be to use one fan to cool both the Duet board and the PSU by putting both in the same casing (3D printed, of course!).

Ah, good point - I'll have to check. May need yet more wiring...

Ran out of filament and couldn't get the new to follow on so I'll probably start again with a new reel. So far the printing is nearly perfect. This printer definitely works best with large prints. Well, it's what it was built for

That's interesting. Hadn't thought of earthing stepper motors. My XY motors are mounted on the frame but Z and extruder motors are insulated. The extruder motor doesn't drive a belt but I think I'll earth it anyway. I've been careful with earthing the frame and aluminium print bed on my Giant printer with a mains voltage bed heater as recommended.

Printing another, much bigger vase.

Finished. Vase is about 140mm at it's widest and nearly 340mm high. Printed in yellow PETG. The rails are not actually bent - it's the wide angle lens!

Vase printing on Giant 3D printer.

Test print - Spiral Vase mode, bowl with 45° walls, 100mm diameter base, 200mm top and 50mm deep. Printed in translucent yellow PETG. These photos show that it holds water unlike my previous test prints.

Now a member of the E3D forum and had a good look through the "E3D Titan Extruder" posts but found nothing about dual extruders so I'll probably post a query.

Definitely better than the last print but still not perfect.

Just run a test print in Spiral Vase mode and it's printing reasonably well - maybe slightly better than the same gcode last time. Cooling working really well. These screenshots show the temperatures before printing and when nearly finished.

Been looking at how I could arrange dual extruders and hotends. Having tried Bowden feed a couple of times and always found it unworkable I shall be going for both extruders mounted on the X carriage. The E3D Titan extruders have smaller and lighter Nema 17 stepper motors available with them which should help with the weight/mass. The extruders themselves are very light and efficient. I want to get the nozzles as close as possible and this is what is causing the main difficulty. Firstly I thought of putting the extruders face to face on the front which certainly gives nice close spacing but it would then not be possible to take the covers off for clearing filament blockages. E3D provide a mirror image extruder for this very purpose but that still leaves problems. I see E3D have a forum and I have applied for membership so I can see how others have solved this problem.

With the front on the Duet box, the fan is blowing lots of air across the back and front of the board and it's the quietest fan I've ever heard (or not heard ). Now if I could replace the 24v PSU fan with one of those the printer would be practically silent except for the occasional sound of the belt teeth on the pulleys of the Z drive. I've just ordered another as I can think of several uses.

Printed the Duet box front and fitted it.