mendel90 problem with connection to pc(SOLVED)

Hi, i bought nop head's kit mendel90 and i have problem to connect the printer with pc.

I have windows 8 on my laptop.

So, i copied all folders from the sd card to the pc.
Connect printer and instal drivers.
Run Arduino ide and set the board to “Melzi W/ ATmega1284p 16mHz
When i try to set USB port, there is problem, because is not avaibile(just COM 3)
I try to change settings of the driver in device manager, but there is just COM 1,2,3,4,5,6 .......

I copy the file which i save with arduino ide back on the sd card.

When i try to connect via pronterface, printer is not responding.

I repeat all of these steps many times and try to find any mistake.
Read forum and looking for help.
Wires is checked.

Can someone help? TY

Sry for my english.

Edited 1 time(s). Last edit at 11/14/2013 04:10PM by Fleshbone.

I have found that often Windows fails to recognize a USB device when it is connected. There are two things to try:

1) Connect the printer to a different USB port. If Windows detects a device it usually makes a sound and may prompt you to install a driver. Allow Windows to search Windows Update for a driver which it will then download and install.

2) Google for "Windows remove unused COM port" and follow the resulting instructions to determine if the driver installed badly and there is an unused COM port assigned to it. You can remove bad ports and drivers then try Step (1) above again.

Regards,
Neil Darlow

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I try to write with consideration for all nationalities. Please let me know if something is unclear.
Printing with Mendel90 from fedora 25 using Cura, FreeCAD, MeshLab, OpenSCAD, Skeinforge and Slic3r tools.

So, i remove non used com ports and change the usb port.

Reinstal that device several times.

The COM3 port is make by the serial converter, but ... [www.ftdichip.com] look like be normal.
I found some USBminy a USBasp in arduino/tools/programer, but it not change the serial port.

When i try to connet the printer via com3 port, it send me back some letters, but it make no sence and hotend cooling fan spin for 1 sec like switch power on.

I dont know where the mistake is. :/

Sry for my english.

Can you borrow another computer?

Or burn a linux disc and try that....

Actually, I had the same problem with my main machine, but my netbook worked fine.

Download the latest version of pronterface....

[koti.kapsi.fi]

New version of pronterface don't bring something new.

Can Cura connect to your printer?

Try a linux disc....

Sry im don't know what you mean with Cura.

Solved, im now feeling like totaly noob.
In pronter face i have selected wrong baud rate for printer comunication.
I have chosen 9600 ... maybe default, after change to 250000 it start to comunicate.

I have a little problem, i print only from my SD card, but after I connect my printer to the PC and remove the SD card to copy my files on it, the printer disconnects every time. Is there any way i could copy my files on the card without having to remove it?
Wich auto reset jumper should I remove?

You can upload files to the SD card via USB but it is very slow.

I think the reason it disconnects is a hardware bug. The SD card gets its 3.3V power from the USB chip and when the card is inserted it must cause a glitch on the power rail. I think it could be cured by adding a decoupling capacitor across the power pins of the SD socket.

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