Need help setting M80 and M81

[quentinthornton]

I just got my relay from the store and I built everything here http://www.instructables.com/id/Convert ... /?ALLSTEPS except for the last part where it says to plug it in to the ramps board. I scrolled all the way to the bottom and it showed me how to connect it to the rambo 1.1 but I have a rambo 1.3. Does anyone know where I should connect the 3 pins (vcc, signal, ground)? thanks

[johnr]

So does anybody have any idea or should I just discontinue my project?

[ednisley]

So does anybody have any idea

I'm assuming "johnr" is the same person as "quentinthornton" and this continues the discussion started in the other thread:
posting.php?mode=quote&f=2&p=14053

The RAMBo 1.2 and 1.3 don't have an auxiliary power connection from the USB port: when the board power supply goes off, the microcontroller is completely off. That design change removed the PS_ON connector, because the board can no longer turn its power supply on when it's off.

In short, you can't get there from here.

It's possible to set up a latching switch that will let you manually turn the power on, then let the microcontroller turn it off. Unfortunately, that requires an always-on auxiliary power supply for the relays, which pretty much defeats the point of turning the printer off in the first place.

[johnr]

Sorry, I just felt sort of embarrased asking so many questions. But anyways, is there a way just to turn it off? All I want to do is turn it off when the print is finished. Thanks.

[Jules]

Do you have any idea how many questions I asked? Just ask the guys......(well, no, on second thought, don't.)

I don't know if there is a way to turn off the machine, as a matter of fact, the only way I know of to do that is to walk over and flip the switch. But it does help to turn off that excruciatingly noisy extruder fan, and there is a code that you can add for that in the Advanced section of S3D, if you are using that.

Go to Advanced > Scripts tab under the Ending Script section. And copy this into the area:

M104 S0 ; turn off extruder
M140 S0 ; turn off bed
G91 ; relative mode
G1 Z10 ; lift 10mm
G90 ; absolute mode
G1 Z190 ; drop Z axis to just above spring
G28 X0 ; home X axis
M84 ; disable motors
M106 S0 ; stop bed fan
M108 S0 ; stop extruder and electronics fans

That lowers the platform to just above the printed Z-axis spring on my printer, (if you don't want to do that, take out the G1 Z190 code line) and then cuts power to the fans and turns off the heated nozzle and bed, so the machine just sits there quietly until you get ready to print again.

[johnr]

Thanks, is that the best way to use minimal power? All I really want to do is use the least amount of power because I'm always gone for long parts of the week. Thanks for your help so far.

[insta]

Have you actually checked how much power the M2 draws sitting there with just fans and a RAMBo running? It might be like $4/yr.

[ednisley]

how much power the M2 draws sitting there with just fans and a RAMBo running

My highly modified setup, with 24 V and 40 V power supplies, idles at 18 W. I'd expect a bit less for a single-supply M2.

Leaving it on all the time with our power rate of $0.17/kW·h would cost $27/year. Your rate will almost certainly be lower.

If I left it on full-time for two days a week, that would be $27 x 2/7 = $8/year.

Not worth worrying about, compared to all my other equipment...

[johnr]

Okay then, thanks for your guy's help. I'll just leave it as it is. Thanks again guy's