nanoDLP

Just the same build version with above wget command reinstall ?
or how to install beta ?

I already have a new installation of Raspbian light on a new
SD Card performed. Currently is running a test print and is
already at Layer 140
Although I already several times "Stop Print" and "Print Resum" have performed,
runs nanodlp without problems.
I have the previous installation on another SD card and can do further tests

Im using "Raspberry Pi 2 Model B" with "Full desktop image based"
"Debian Linux 7.8"  "Linux 4.1.13-v7+ on armv7l".
In this print-job, I have executed more "Stop Print" and "Resume Print" on different Layers without issues (about 5 times)

My hardware is Arduino with Ramps and marlin firmware,
Raspberry worked after the crash but quite normal.
However, I have for test reasons also an HDMI-VGA adapter in use to which a monitor is operated.
I will make futher tests without the HDMI Adapter, what I have read could it be a problem.
Could it also be a problem, if the resolution of the monitor differ to the resolution of the layers in the plate ?

It works well.

Thanks

I think I now have a workaround.
I added the command "G1 Z[[LayerPosition]] F40" a second time, so I once more can query the answer "[[WaitForDoneMessage]]".

Before Each Layer
============================================
G1 X0 F150
[[WaitForDoneMessage]]
G1 Z[[LayerPosition]] F40
[[WaitForDoneMessage]]
G1 Z[[LayerPosition]] F40                   <<<<<<<<<<<<  second identical code do nothing, because it's already on position
[[WaitForDoneMessage]]                    <<<<<<<<<<<<  but now the Projector is waiting
[[PositionSet [[LayerPosition]]]]
============================================

please have a look at the video,
especially to the code "G1 Z0.2 F40" the yes occur twice.
The first movement takes in reality about 6 sec. and the second
"G1 Z0.2 F40" is already done.
The answer of "Z_move_comp" does not fit together in time

then I tried the extra code G4 after each G1 Command,
but there is also a strange behavior of "Z_move_komp"

Before Each Layer
============================================
G1 X0 F150
G4 P500
[[WaitForDoneMessage]]
G1 Z[[LayerPosition]] F40
G4 P500
[[WaitForDoneMessage]]
G1 Z[[LayerPosition]] F40
G4 P500                                 <<<<<<<<<<<<<<<<<<<<<<<<     projector start first to expose, then after this time shutter opens
[[WaitForDoneMessage]]                                                              "Servo Signal Length" will be ignored (is 2000ms)
[[PositionSet [[LayerPosition]]]]
============================================

the printer now seems to work, and for the shutter i can insert a seperat  M280.
If the terminal should display the answers of the firmware in real time, then I'm not sure if it still may be an intermittent problem.

Hi Shahin,
I still have made further tests, with marlin-firmware.
If I add in the end of the GCode block "Before Each Layer" a "[[Pause]]",
then the projector awaits until I click on "Resume Print".

Now my GCodes

GCode - Start of Print
============================================
G21
G91
G92 X-9.5 Z53.4
G1 Z-1 F90
[[WaitForDoneMessage]]
G1 Z200 F90
[[WaitForDoneMessage]]
[[Delay 5]]
G90
G92 X-9.5 Z53.4
[[PositionSet 53.4]]
G1 Z20 F800
[[WaitForDoneMessage]]
G1 Z[[ZLiftDistance]] F90
[[WaitForDoneMessage]]
============================================

Before Each Layer
============================================
G1 X0 F150
[[WaitForDoneMessage]]
G1 Z[[LayerPosition]] F40          <<<<<<<<<<<<<<<<<<<<<<<< during movement comes the message "Action: GCode paused printer"
[[WaitForDoneMessage]]           <<<<<<<<<<<<<<<<<<<<<<<< maybe ignored
[[PositionSet [[LayerPosition]]]]
[[Pause]]                                  <<<<<<<<<<<<<<<<<<<<<<<< Projector waits until resume print
============================================

After Each Layer
============================================
G1 X-4 F40
[[WaitForDoneMessage]]
G1 Z{[[LayerPosition]]+[[ZLiftDistance]]} F20
[[WaitForDoneMessage]]
[[PositionChange [[ZLiftDistance]]]]
============================================

I'll give up to control the movements with "Z_move_comp", and now I changed to timed controlled movements with [[Delay xxx]].
The projector not getting otherwise under control.
While it is not the best motion control, but for me it works.
Also, I changed back the firmware from Marlin to Repetier.
The movements of my printer have therefore become noticeably more harmonious.