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DB Mark DP processor encoder knob jumping

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dlyxover View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote dlyxover Quote  Post ReplyReply Direct Link To This Post Topic: DB Mark DP processor encoder knob jumping
    Posted: 23 February 2020 at 9:19pm
I have a DB Mark DP48 and DP36 processors both units encoder knob have the same fault.

When turning the encoder knob it randomly jumps and skips about.

Dose anyone else have this issue?

if so are there any fixes?

cheers
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Joe Grime View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Joe Grime Quote  Post ReplyReply Direct Link To This Post Posted: 24 February 2020 at 10:58am
My dp4811 has done this from new, firmware glitch.
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dlyxover View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote dlyxover Quote  Post ReplyReply Direct Link To This Post Posted: 24 February 2020 at 12:14pm
Originally posted by Joe Grime Joe Grime wrote:

My dp4811 has done this from new, firmware glitch.

Bugger.

is there firmware update, dose anyone know?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote odc04r Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2020 at 10:14am
I wouldn't call it a glitch, it's bad design either in software or hardware. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote callumtruds Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2020 at 11:02am
Have you emailed blue aran?  They would be able to tell you if its possible to remedy the randomness. 
Heard of the older units having the jumping jog wheel, 
is yours a new one? 
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dlyxover View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote dlyxover Quote  Post ReplyReply Direct Link To This Post Posted: 25 February 2020 at 1:05pm
I bought the units from Tony Wilkes years ago.

Agreed the worst ting about these processors.

No problem if your using the pc to control.

But looking to sell 2 units and was hoping for a fix 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 17 March 2020 at 11:02pm
there are 2 small capacitors and resistors on the pcb next to the encoder that are for 'debounce'. They are a different value than the encoder manufacturer shows on the datasheet. You can change them if you like, it will usually cure the jitter (change the encoder too while its apart) at the expense of having to operate the wheel a little slower than is always convenient.

PS here's a circuit from one of the datasheets, it's a similar setup on the db mark.

On some Alps datasheets, they recommend debouncing entirely through firmware.



Edited by kedwardsleisure - 17 March 2020 at 11:07pm
Kevin

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dlyxover View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote dlyxover Quote  Post ReplyReply Direct Link To This Post Posted: 20 March 2020 at 1:05pm
hi Kevin

Thanks for that, I'll Give it a go.

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