Mist Coolant <Resolved>

[cclark]

Hello,

I am trying to setup a mist cooling system on the #8 output on the expansion board. I have the air valve wired up and have tried to wire it all possible ways. When I try to turn on Mist (M7) I can hear the board click, and the green light is on the board, but I am not getting power to my valve. My air valve is NC and I have that setup in the software.

What am I missing?

[tblough]

How is your valve wired to the relay? It looks like the relay is working correctly, so it's either the solenoid is bad or the wiring is incorrect.

[ShawnM]

There is a schematic on wiring flood, lube and mist solenoids but the link is broken from Centroid. The diagram is S14812 but it wont open from the schematics page. It reads "error, page not found".

The solenoid is probably wired wrong. Assuming it's a 24v solenoid wire one lead to ground or common and put the other lead on the NO side of relay 8. Apply 24 volts to the common pole of the number 8 relay. When number 8 latches with your M7 command it'll supply 24 volts to the solenoid.

[Centroid_Liviu]

I tried to open that schematic and it opens for me. Direct link is below, let me know if it still is not loading for you.
https://www.centroidcnc.com/dealersuppo ... 812.r2.pdf

Update: Link works but is obsolete, ignore, new schematic being drawn.

[ShawnM]

I tried to open that schematic and it opens for me. Direct link is below, let me know if it still is not loading for you.
https://www.centroidcnc.com/dealersuppo ... 812.r2.pdf

I went to the Acorn Schematics page and searched "mist" and the only diagram that pops up is S14812 dated 6-24-2021, revision 1 and when you click the PDF icon is says page not found.

The one you linked to is labeled rev 2 but it's so old (dated from 2017) the Acorn boards don't look like that anymore. Not sure how it's rev 2 when it's older than the rev1 drawing listed on the schematics page. I don't even know where you have that one listed since it doesn't come up in a search.

Please consider updating the drawing, revision number and fixing the link on the schematics page. Here's the link to the schematics page from Centroids site that I used and the link is broken.

https://centroidcnc.com/centroid_diy/sc ... corn%20rev

Search "mist" and see if the link works for you.

[Centroid_Jacob]

I tried to open that schematic and it opens for me. Direct link is below, let me know if it still is not loading for you.
https://www.centroidcnc.com/dealersuppo ... 812.r2.pdf

I went to the Acorn Schematics page and searched "mist" and the only diagram that pops up is S14812 dated 6-24-2021, revision 1 and when you click the PDF icon is says page not found.

The one you linked to is labeled rev 2 but it's so old (dated from 2017) the Acorn boards don't look like that anymore. Not sure how it's rev 2 when it's older than the rev1 drawing listed on the schematics page. I don't even know where you have that one listed since it doesn't come up in a search.

Please consider updating the drawing, revision number and fixing the link on the schematics page. Here's the link to the schematics page from Centroids site that I used and the link is broken.

https://centroidcnc.com/centroid_diy/sc ... corn%20rev

Search "mist" and see if the link works for you.

Shawn,

It looks like the rev1 of S14812 was for Mist but was edited and reissued for Clamp instead in rev2. The rev1 files are missing which is why the link is broken, but the reissue changed the description to state clamp instead of mist. This created two listings for the same schematic number and the schematics DB favors the newer revision when searching by Schematic ID. Searching 'Mist' bypassed that favoritism. I will ask around and see if we can reissue the Mist version of S14812 under a new schematic number or if it was pulled for some other reason.

Edit: And you are correct, they are older schematics for a previous version of the Acorn. This is likely why we didn't notice it was broken. Technically, the best schematic to follow would be S15010 or S15031 although it is a complete 'system' schematic and contains more info than is what's needed.

[ShawnM]

Shawn,

It looks like the rev1 of S14812 was for Mist but was edited and reissued for Clamp instead in rev2. The rev1 files are missing which is why the link is broken, but the reissue changed the description to state clamp instead of mist. This created two listings for the same schematic number and the schematics DB favors the newer revision when searching by Schematic ID. Searching 'Mist' bypassed that favoritism. I will ask around and see if we can reissue the Mist version of S14812 under a new schematic number or if it was pulled for some other reason.

Edit: And you are correct, they are older schematics for a previous version of the Acorn. This is likely why we didn't notice it was broken. Technically, the best schematic to follow would be S15010 or S15031 although it is a complete 'system' schematic and contains more info than is what's needed.

Thanks and I see the search has been updated to now locate the schematics you reference. I direct people to the schematics webpage often and show them how to "search" for whatever they need.

Thanks again for updating this.

[cclark]

I have tried all these and have tried 2 different brands of valves. Green light is on the board and can hear it engage. But cannot get power out. Checking power with my voltmeter and nothing, even checking at the ends of the wires even before connecting to the valve. I am referring to drawing S15010.

Being just 2 wires there is only 4 ways that it could be wire to the board and I have tried all 4 ways. The first way I tried was with the black common in the center and the hot to the left since my valve is NC.

[suntravel]

Think of the relays as a NC/NO switch and wire something to them as you would do with a manual switch.

Uwe

[richardb15]

Did this ever work, and are you using a fly back diode on the solenoid? I fried one of my Acorn relays contacts by forgetting to wire a snubber/diode across it. Just get a multimeter set to continuity check, put one lead to the cenre contact on the relay and the other to either of the outer contacts and force the output on/off and just see if its actually turning on/off at the relay contacts.