PeterE builds a 3d Printer

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PeterE:
Hi,

@chipenter; Thanks for the tip. I checked out the Repetier Host site and it looks interesting to say the least. I think also it is possible to install it in parallell to the Marlin on my PC for comparison sake. Think I will do that if not just for the learning curve of 3D SW varieties.

@picclock; You are right, the display is not working. I will try to reverse the cables to see if I have got them mixed up. The numbering is mostly hidden under the board connectors so it is really a bit of guesswork to get it right. After switching places I will get an answer.

The comment about power supply issues is also interesting. I have been thinking along that line as well. Everything uploads etc, but no other activity kind of suggests that. The fan in the PSU starts and I have 12 V DC on the lines to the Arduino so should work, but one thing annoys me. I can see that there are a number of bridging connectors and I wonder if any of those are placed on the wrong connectors. There is nothing described about that in the description for a "normal" setup, only if I want to either have a separate power supply to the Arduino PSU inlet together with the power to the RAMPS shield, or if I want to enable the PS_ON function.

Will try the simple bits first and see where goes.

Even though this is kind of frustrating, it is also very educative - both for me and my son. As it seems we will have use for this contraption as it start functioning :thumbup:

/Peter

Quick reply after an equally quick test. The display lights up when power si switched on. So does a red LED on the Arduino board which means that we have power. The display does not show any text or graphics, just an area where I think graphics will be displayed when everything is operable.

So first quick test gives some indication at least. Back tomorrow.

chipenter:
It should be a green light on connection so something is not right .

picclock:
@ chipenter

My arduino board has red leds. The one nearest the print connector flashes to show the system running, and the one just behind is on permanently to indicate power. I had a very early board with one green led, but I fried it by shorting two pins together :-0

Best Regards

picclock

PeterE:
Chipenter & picclock,

Yes there is surely something fishy going on. The green activity lights works well when connecting the PC through the USB port and clearly shows both being switched on and if I upload it blinks like --- yes.

The red LED in question is placed just inside the connectors to the RAMPS board on the left side about half way from the USB end. I can see it lighting through the RAMPS board.

Must try to figure out what it wants to tell.

Will try to install Repetier to see if I understand that one a bit easier.

/Peter

picclock:
Hi PeterE

I think we may have a slight misunderstanding. The red leds I was referring to are on the arduino board. It is likely these that you can see through the holes in the ramps board. The ramps board - well my one at least - has a green led at the green plug in connector end. It is only necessary to plug a printer usb lead into the arduino (with ramps attached) to power up a useable functioning display - no other power supplies or connections required. If the bed/head thermistors are not connected the system will halt with a MINTEMP error message. Either way the Marlin screen should be displayed and will continue to be so even if the system is halted. Basically the display will work with just the ramps/Arduino boards assembled together even with or without the motor drivers, thermistors or any other connections. Very first post of my build log shows a picture of this complete with MINTEMP error, as nothing connected.

I think I am as keen to see your printer working as I am to get my own finished :thumbup:. Good luck with the debugging.

Best regards

picclock.

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