Geeetech

Hi
Thanks for reply.
I am sure that arduino compiled firmware and uploaded it successfuly.
I got the final solution and conclusion.

1. The firmware "Marlin PI3_Pro_B" may not work on some i3 proB GT2560 printer by some reason.
2.I found the firmware " Ramps_for_i3" which I got from Geeetech via e ...

Hi.
I found X motor moves reversed direction after extruder changed.
My i3 proB was working very well one year.
So I down loaded the firmware " Marlin PI3_Pro_B" as Forum suggest , to change the direction in configuration.
Arduino 1.0.1 compiled the file and loaded it to GT2560.
But I found no LCD ...

Why is cooling erxtruder necessary? That is the question I had since I used my I3 printer a month ago.
Finally I got clear answer for this question.

It happened that I run ABS printing ( extruder temperature 235 Bed 100)
a few hours without cooling fan for extruder.

Suddenly I found something ...

Problem was solved.
1. Found A0-A7 pin connectors , between Ramp 1.4 board and mega 2560 board, was NOT CONNECTED.
Female connector at 2560 board was bent a little so not matched together.
All x, y motor control signal comes through A0-A7 .

2. Found that only x axis max endstop signal pin has low ...

Hi
Thanks for your reply.
All drivers boards and jumpers are correctly plugged.
I installed again the firmware ( ramps1.4 i3) which you sent by email, But no difference.
Foundings:
When repetier host newly connected, LCD display show origin value as x 0 , y 0 ,z 000.00.
Then I moved x by +10mm ...

I am doing run test after assembly of acrylil i3.
Z motors works well under Repetier Host manual control, but X,Y not moving, no humming.
And found that ,with oscilloscope, no x y step pulses come out from mega 2560.
Z has good pulses from 2560 board.
What shall I do ? Is there something missed?

Dear zhangxueyou
Thanks for your attention.
I found some driver file / folder in Arduino 1.6.2 (Arduino Environment Software) and it succesfuly loaded
and make mega2560 alive. There may be some difference between "Drivers " ( RAR file )in geeetech instruction and "driver " file in
arduino ...

When pluged usb cable between newly assembled acrilyl I3 and my win xp, xp found new hardware "arduino mega 2560".
I already downloaded usb serial driver from linked in instruction as " driver " which is RAR file , and unzipped this file
and get serial-install>usb uart xx and saved it. usb uart ...