why nozzle and bed don't heat !?

Good day all!
I have finished building my own home-made CoreXY .
But after making homing and autolevel, I expected the bed and nozzle to heat up and the fan blows.
But nothing happens ... is it a problem or it is necessary to launch printing so that the nozzle and bed heating start.

I'm using MarlinRC8, ramps 1.4, mega2560 board

It needs working temperature probes (thermistors normally)
If its not reading room temp or higher it will not heat

You do have to turn them on though.. it not automatic

Thanks,

I have my probes well connected and they read well the ambient temperature, Fronterface tells me 21 ° which is the temperature of the room

Do you have power to both the 11amp 12v and 5amp 12v power plugs on the ramps?

so if you send a "M104 S190" does the D10 led turn on? Does the hot end temp increase?

Second led in from the left top corner

Thanks,

Well, when I send M104 s125 (for example) it works,
and M140 s70 it works too, temperature increase.
But when I launch the print (it's my first print) the bed heats but not the nozzle.
?


I have a power supply 12V 20A, hotend E3D v6 and hotbed 21,4x21,4 dimension.

I use pronterface (under linux ubuntu 16.04) , slic3r , MarlinRC8, ramps 1.4 board, and mega2560 board with arduino.

This means that your machine is actually working.

I suspect the gcode is waiting for a bed temperature before heating hot end.

gcode is just text, open it up, have a read

search for M140 (set bed temp and accept more input)
also search for M190 (this also set the bed temp, but will wait till the Temperature is achieved)

also find out where you M104 command are, after or before M190's

Ideally a M190 should only be used as the last command possible before the real printing begins.

Normally this sort of thing is in your gcode.start Open up slic3r go to printer settings | Custom g code. Take a look at what in the Start G-Code section
and re order if needed.

Thanks a lot for your help.
Now this is settled.
On the other hand I will have to find the right setting for
coordinating the lead with the wire extrusion ... but that's another topic.

I can help you with that. Reply if you need help. Just finished that on my printer actually.

Thank you Matt for your suggestion. That's nice.
I will try to understand a maximum what happens before asking for help.
I think we understand better when we make the effort to understand.