Polaroid Pro Palette 8000 experience?

[Ergos]

Hello!
Thanks for your reply. I had already downloaded the manual. It says:

Dark, or pale colored horizontal lines across image: Make sure the recorder is properly grounded (including extensions and multiple outlet strips), use only the cables supplied with the recorder, and protect the unit from bumps and vibrations during exposure.

it should be grounded. I used a different SCSI cable and a terminator on the second SCSI port. I used the SCSI cable with my drum scanner. It's fine.
The error, or rather the lines and glitches, vary greatly. I had also thought it might be a connection problem. The self-test is fine. Rasterplus runs perfectly on the Mac. I still have an older palette that works.
I will definitely take another look at the SCSI settings.

So far, I have only exposed colour. With a colour negative film, only a few images had stripes. The files are created as TIFFs. Is there a better file format? And what is the optimised size?

 

[koraks]

whether your SCSI addressing and termination is good. As you’ve noted, the images are sharp and well exposed, excepting the colour glitches, and so it may be some type of data flow error from your computer or software.

I don't think that's a plausible cause.
Termination and cable issues would result in problems like the machine not being consistently detected by the host computer, the connection becoming lost in the process and image output ceasing altogether, SCSI bus errors and insofar as you'd be seeing it in the form of data corruption, it would never involve neat horizontal bands like shown here, but more 'fuzzy noise' so to speak. This is not a cable or SCSI adapter problem.

The problem seems to be related to one or two colors periodically dropping out. Interestingly, it seems to be happening on a per-image basis since the lines don't run through consecutive images; they are specific to the image. (Which also emphasizes it's not the cable, since that would mean the intermittent contact issues would be exceedingly unlikely to neatly 'align' with the images!)

You'd have to look at how the image is being generated and then work your way backwards and list & eliminate possible causes. Since in principle all color channels do work most of the time, I'd expect the problem to be in the control of the color images and it might be associated (wild guess) with a bit of circuitry around a local memory buffer that temporarily stores a small amount of image data. It may be something simple as a poor solder contact on a one of the pins of a single memory chip, or a logic chip involved in an address line etc.. Again, that's a very wild guess.

 

[Ergos]

OK. Thanks for the information. It will be difficult to find the fault if I have to measure every component. Is there a circuit diagram?

Do you also use TIFF files? What size specifications do you use?

 

[clift_d]

I also use TIFF files saved without compression, but I’ve found that they need to be in the older Interleaved format rather than a Planar format for the driver software to parse them properly.

 

[Ergos]

Okay. And the image size?
Mine are 30 cm on the longest side at 300 dpi.