Wiring help on SJ doserless mod

Ernie1

I just picked up the used Super Jolly and when the previous owner demo’d working I realised it’s an automatic doser… so will require some wiring to get the on/off switch to function without the doser.

I’ve got two black wires which connected to the doser lever (to auto-grind after 10 or so pulls) and two grey wires which ran to a flap switch at the top of the doser.

These four go into a connector plug that plugs into the wiring in the grinder body.

I’m assuming some combination of connections will allow me to run the switch as normal, I’m just not sure which!

Thanks!

Cuprajake

try to post pics

the safety switch should just make a contact so in theory just need joining, but pics will help

Ernie1

Thanks, got it running.

I removed the four leads from the terminal block, left the lever switch disconnected and ran a jumper between the other.

Pics of before and after… presumably this is safe to run like this??😅

Cuprajake

where do the wires terminate from that block?

Ernie1

Which ones?

Cuprajake

the ones in the red sleeve

Ernie1

They were the four that went to the doser, two grey wires to the full switch at the top of the doser and the black ones on the switch linked to the lever.

Ernie1

Also…

There’s quite a loud knock sound when switching the grinder on and off, sounds very much like a relay or similar.

I tried to get a video but it doesn’t capture it very well.

Is this normal or could it be a byproduct of my wiring job…

Cuprajake

http://www.espressomyespresso.com/HowToKonyMod.html

looks similar

Ernie1

The noise isn’t that prominent now it’s all buttoned up. To be honest I think my Mini did the same.

On the plus side, got the grind-by-weight setup I always wanted… 😂😂

Walnut bits are still on their way from Wiedemann in Germany but for now it’s dialled in and I’m pleased with initial results.

DavecUK

Ernie1 Looks very neat!

Ernie1

I thought I’d ask here rather than start another thread;

The switch on my SJ works like this - Click on to power on the grinder, then a spring-loaded push to start the motor. Then switch off to stop the motor (which also switches off the grinder).

I’m guessing the reason for it working like that is because in a cafe it would be left in the on position and the motor would just run occasionally when the doser switch was activated.

However, now it’s doserless it would be good to have a simple on/off.

Would it be possible (and relatively straightforward) to change it to an on/off switch?

dilin

@Ernie1 didn’t it already work like that? I converted my auto to simple on / off by:

Gently pull on the wires at the microswitch so you can see which ones they are on the bottom. Remove these from the terminal block.
Repeat above with the wires at the bottom of the doser. Use a short wire to jumper these 2 terminals on the terminal block. These are all that needs jumpered, NOT the ones that the microswitch went to. (adapted from HB)

Basically, your grey wires would be disconnected, and your black wires, jumpered.

Maybe you wired them the other way round?

Ernie1

dilin

Thanks yeah I wired it the way you described and it works well.

The question above was just a minor thing about the way the black switch on the side works. By default it’s a clockwise click to power on the grinder, and then the spring loaded push to actually run the motor. I wondered if there’s a way to just have it on/off without the sprung part.

dilin

I think I could have jumpered both sets of wires. End result would be OFF - ON -ON (spring). I don’t need to engage the spring loaded ON for it to start grinding.

I did it like 10 years ago so I wasn’t sure which was which.

Ernie1

Ah that’s a great help thanks, the functionality you’ve described is what I’m looking for. Just makes ‘topping up’ doses a bit easier if I’m using the hopper.

I’ll have another look at the wiring, I haven’t had the base off again since I first got it.

Newdent

Ernie1 wire as per the instructions near the bottom of this page https://home-doserless.com/product/mazzer-super-jolly/ I used these when I had an SJ and Mini and it operated on/off from the switch.

Ernie1

Made a quick video to show how the switch works. See how it switches ‘on’ then takes another spring push to activate the motor.

I’m keen to have the switch just on/off. I’ll take a look at the wiring.

Apologies for the video quality, no idea why it’s so bad.

Ernie1

Made a quick video to show how the switch works. See how it switches ‘on’ then takes another spring push to activate the motor.

I’m keen to have the switch just on/off. I’ll take a look at the wiring as per @dilin comment.

Apologies for the video quality, no idea why it’s so bad.

Cuprajake

That’s how mine works. Never had a prob with it really

Ernie1

Cuprajake

I think if I was single dosing it would be no probs at all, it’s just really to make it slightly easier to do ‘top-up’ quick bursts to make up the dose.

If I do go ahead with painting it I might see about changing the switch entirely to something like the Niche toggle switch.

Not a big deal at all either way!