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  1. 640 says white cartridge is out of ink, but it isn't

    For several days now, the machine is reporting that it's out of white ink, but the cartidge is almost full. I've removed and replaced it several times, tried cleaning it, reset the machine etc. but it just keeps beeping and saying it's out of white ink. I don't know where to go from here, the...

  3. Materials won't lay flat

    I'm using an SP-300 to print on various materials, including adhesive vinyl sign material, banner material etc. and as the material is fed into the machine, it develops small bumps that end up getting wiped over by the print heads, leaving streaks all over them. The machine has been checked by a...
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