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Thread: Scanner Comparison 2019 [Epson Flatbed | Eversmart Flatbed | Drum Scanners]

  1. #121
    Pali K Pali K's Avatar
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    Re: Scanner Comparison 2019 [Epson Flatbed | Eversmart Flatbed | Drum Scanners]

    Larry, it is most likely a cause of bad DC motor bearings. I have a new motor - I just haven't replaced it yet because I never scan over 4000 DPI.

    Pali

  2. #122

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    Re: Scanner Comparison 2019 [Epson Flatbed | Eversmart Flatbed | Drum Scanners]

    Pali, thanks. I did a quick search and see mention of a Maxon 285787 motor. Is that the one? Where did you get the motor and what was the cost? It's not to the point I need to replace it yet for large format, but for 6x7 and smaller I generally scan at the max resolution on the 5000. Getting rid of the jaggies would be nice.

  3. #123
    Indiana, USA chassis's Avatar
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    Re: Scanner Comparison 2019 [Epson Flatbed | Eversmart Flatbed | Drum Scanners]


  4. #124
    Pali K Pali K's Avatar
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    Re: Scanner Comparison 2019 [Epson Flatbed | Eversmart Flatbed | Drum Scanners]

    Larry, I got mine from ABC-Scan before they closed a few months ago. Maxon 285787 is not the stock version but it was speculated that it might work but polarity may need to be changed. The original is 143202.

  5. #125

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    Re: Scanner Comparison 2019 [Epson Flatbed | Eversmart Flatbed | Drum Scanners]

    Also bearings may be simply replaced for a perfect fix, I'd say that the bearings inside a maxon are pretty standard in a skf/fag catalog.

    Maxon installs bearings for +20,000 hours service for rated specs without inbalance. It is a surprise if bearings inside a maxon fail, if not a bad design of the assembly. I've played a bit with maxons and found they are top Q.

  6. #126
    Pali K Pali K's Avatar
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    Re: Scanner Comparison 2019 [Epson Flatbed | Eversmart Flatbed | Drum Scanners]

    Pere the only reason why I say this is bad bearings is because it is a known issue. The Scanmate service manual itself notes that it is due to bad bearings in the DC motor and recommends replacing the motor as a fix. I know some people who replaced and saw significant improvements. The motor is fully enclosed but I am sure there is some tricks to get it to open and replace bearings but might not be worth the effort. I paid $150 EUR for mine but the company I bought it from is no longer in service.

  7. #127

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    Re: Scanner Comparison 2019 [Epson Flatbed | Eversmart Flatbed | Drum Scanners]

    A known issue is a known issue. Anyway it would be interesting to measure the axial play of the replaced motor, to know what play caused the problem, specs (new) are 0.025mm. These are preloaded type bearings to provide a degree of stiffness...
    Last edited by Pere Casals; Today at 08:16.

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