Build Your Own SLA/SLS

This is my own developed. almost
I call it miniсubе
I'll do it soon ...
That chassis

Thank you!
My printer has a 2 Z axis
resolution XY-axis 45 micron
Projector acer 1276 with optic modification

Printed polymer EC500 for Envisiontec
resin for cast

EC500

EC500

The following printed on its own polymer
not for cast

layer 0.025mm

it would be cool to adjust the power of the projector through a color change layer, but this requires a variable number of the layer and variable color (rgb)
Now I adjust the time power was lighted, but there are times where the polymers can be lit up with 400 ms and have to put in the settings gray

was any dirt present? No it isnt it looks like a newish device Yes, its new device I think may be problem in resin? Im use makerjuice SUBG+ version 2 + pigment. I try other projector (used) - the same result :( the left side is not fully cured To PacManFan: In b9creator software between expositions...

I have tried to impose a mask - does not help
uneven illumination occurs on each individual object.
I think the problem is the output lens or electronics compensating illumination on different objects.
I partly solved the problem by addition of a large amount of pigment to resin

Am I right in thinking the fall off is on the left, if so I would clean all optics, the mirrors in the light engine get clouded and some projectors have a small plate or bar to act as a cut off, if its not dirty you have not lost anything, just time. My English is very poor, excuse me I cleaned the...

Left?
and where to look?

if I increase the time, the middle of burn through.
If I try to print something smaller in size, the picture is not curing repeated (Build area not changed)

What color of mask can you advise?
I can apply a mask in Photoshop

Projector is mounted perpendicular VAT and platform too
Lamp operating time 205 hours
Focus is set correctly.
What could it be?