!!!SOURCED!!! - WTB Single Group project machine.

[Mattk]

Thanks Hoggy. Will do

[Hoggy42]

Hey, I’ve a Viebemme Domobar Super (E61) plumbed in only model for $500 if you’re interested (Syd). Matt

Hey Matt I've just found something but Notthisguy is looking for something maybe pop him a PM.

[Mattk]

Hey, I’ve a Viebemme Domobar Super (E61) plumbed in only model for $500 if you’re interested (Syd). Matt

[Hoggy42]

I have found a machine to play with for now. Don't really have much more cash for another project right now if the mods want to close the thread.

Now the proud owner of a Isomac Tea Due in need of some TLC

[roosterben]

This is something I have been looking at doing for a long time!

I don't want to hijack the thread but let me know if you find a couple of machines, i might be interested in taking one!

Nothisguy: Sent you a PM

[level3ninja]

The drive runs the pump. Flow control.

Edit: Jackster already explained it. What he said.

I guessed as much, couldn't think of anything else it would run. Flow control via speed control rather than bleeding pressure makes a lot of sense.

[Notthisguy]

This is something I have been looking at doing for a long time!

I don't want to hijack the thread but let me know if you find a couple of machines, i might be interested in taking one!

[Lyrebird]

Would also be able to conjure up a very effective controller using an Arduino or RasberryPi too, without having to spend very much...

Mal.

You might be able to: I don't have any experience programming microcontrollers, much as I wish I did. I have a current project in the winemaking field which uses a PLC and HMI and I'm having a lot of trouble getting them to talk to each other. I could probably do the project for half the price if I could program an Atmel or similar but I can't.

That being said, one of the reasons I said my design is more robust than the original is that I deliberately eliminated the microcontroller in favour of an all analogue circuit which is virtually immune to power supply ructions.

[Dimal]

I get around this by using a controller I designed and built myself, much cheaper and more reliable than the originals.

Would also be able to conjure up a very effective controller using an Arduino or RasberryPi too, without having to spend very much...

Mal.

[Lyrebird]

As a point of interest do you sell those unit's (sic) you make yourself?

No.

I used to be involved in audio design, I published a couple of DIY projects back then and swore I'd never repeat the experience. I do not have the patience required: the response to 95% of support queries is "RTFM" but if you say that you sound like a dick.

[Lyrebird]

What's the drive running/why?

The drive runs the pump. Flow control.

Edit: Jackster already explained it. What he said.

[Jackster]

What's the drive running/why?

Drive runs the rotary pump, DC allows for much easier speed control via pwm. All adds up to variable pressure to the puck.

[Jackster]

There is that diadima 2grp on here for free. Would need a pump... But a vibe pump would do for a single group, unless you went for the DC pump and utilized the variable pressure shots it allows.
A smaller boiler is a def requirement probably in a hx configuration..

[roosterben]

Hoggy: I have two project machines in my garage, Isomac Tea Due and Bezzera BZ02, will PM you.

[Hoggy42]

I have been thinking/wondering how hard it would be to convert a 2 group to a single group. A fair amount of work I know...
Including shortening the boiler and frame and remaking/refolding a few panels. But they are cheap...
Maybe a bit more work than your thinking.

It's probably more work than I was thinking I looked at a used 2 group Rancilio a few weeks ago it was $100 condition unknown the reasons I passed on it were it's size and weight and the power required, I guess making the boiler smaller and using a less powerful element might resolve that? if I were going to go that way I'd make the external case's from Perspex polish everything inside and light it up with LED's