An Ormerod in 2020 ...

droftarts

@oliof yes, definitely looks like it printed a bit hot, and without part cooling!

Ian

oliof

My first attempt at printing a fan duct for a separate part cooling fan failed because I didn't understand Ian Burmey's design before modifying it in OpenSCAD. Back to the (virtual) drawing board!

Does anyone know whether the hotend fan is PWMable / supports thermostatic control? The old 4020 is super loud and it would be nice if it just turned off when it's not needed.

dc42

Assuming your Ormerod is still using the original Duet 0.6 controller, there is only one controllable fan output.

oliof

@dc42 it's currently still using the original board. I'll try to source a more quiet fan then (-: I kind of enjoy the singing of the steppers with these old drivers (-:

oliof

Progress with some "original" upgrades: tensioning extruder and herringbone gears are a go, at least in this dry run:

https://photos.app.goo.gl/MfdNzu5QyG21fXnm6

oliof

And this just came in the mail ...

courtesy of ddmetalworks. Needs to wait a couple days until I can install it.

Inspecting the printer I found another cracked part:

Which needs reprinting. Unfortunately my roll of rpet is done. I'm considering reprinting this one in ASA.

droftarts

@oliof said in An Ormerod in 2020 ...:

And this just came in the mail ...

Nice! I never tried one, but I understood they helped keep everything straight.

Ian

oliof

It's elemental to my final plan for this one. I also forgot to show the intermediate state on a new bed (MK2 A4 alu bed, increasing print size to 200x300x250 is the goal).

oliof

Aluminum X arm installed. One Z linear bearing clamp and the hotend carriage did not survive bolts being removed and added again -- I'll replace them in due time. The hotend carriage will get a full overhaul, so I won't waste time and material reprinting the original design.

I also added an integrated leadscrew stepper I had lying around from a project that never saw the light of day ...

oliof

This weekend I managed to work on a kinematic mount for the heated bed which is magnetically coupled to the bed carriage.

The magnet rides in a slot and the coupling is done via a magnet on the underside of the carriage

The magnet coupling in this prototype is strong enough to hold the bed with the t-carriage upside down, but only just so. Still needs some tweaking to be correct, but that's for another night ...