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Hi everybody,
This issue is a bit drifted from forum aim here,
maybe this problem is not related with nanodlp, my first doubt is related with slicer internal workarounds if it capable to deal with non-standard resolution.
On nanodlp setup, enter correct native resolution(lightcrafter) which is 912x1140 to work with pattern mode to get real pixel relay without any processing.
and from raspberry side i modify the config.txt to output this native resolution with custom mode dvi group:
pi@raspberrypi:~ $ tvservice -s
state 0x120006 [DVI DMT (87) RGB full 16:10], 912x1140 @ 60.00Hz, progressive
everything matched, when you open preview on nanodlp you could see the aspect ratio is correct on layer preview page, even on projector gui control software.
but the output is out incorrect sized.
anyone would make a guess?
Last edited by 1125lbs (2017-09-24 18:03:45)
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config.txt inside /printer
disable_overscan=1
hdmi_force_hotplug=1
hdmi_group=2
hdmi_mode=87
hdmi_cvt=912 1140 59.91 5 0 0 0
hdmi_drive=2
config_hdmi_boost=4
hdmi_pixel_encoding=2
framebuffer_depth=8
framebuffer_ignore_alpha=1
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the config.txt inside /printer may influence the config.txt inside /boot?
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No it does not effect config.txt on boot. You need ti edit /boot/config.txt.
It looks like HDMI mode issue. I think Adam on this forum is also using lightcrafter maybe he can help.
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thank you shahin, i will try to reach Mr.Adam
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found a solution,
it was the Y Resoluion setting inside setup, it should match the lateral distortion due by pattern mode theres no resampling
but before you must set the the config.txt inside boot section to match frequencies and DMT custom setings
you should set:
hdmi_cvt=912 1140 60 5 0 0 0 this will set video composite freq and aspect ratio to match the dmd controler dependencies.
hdmi_mode=87
hdmi_group=2
hdmi_pixel_encoding=2 RGB full ( 0-255) this will force rgb encoding
#hdmi_ignore_edid Enables the ignoring of EDID/display data
hdmi_ignore_edid=0xa5000080
hdmi_ignore_edid_audio=1
hdmi_drive=2
sdtv_disable_colourburst=1 disables colour burst on composite output
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"In simple terms, you could think of the horizontal dimension of each pixel as being stretched to 2x it's size. When projected, the 912 x 1140 pixels become 1824 x 1140, which is 16:10 aspect ratio. The trick here though is to understand that this is just a model of what's happening, you don't really have 1824 pixels on the horizontal axis."
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