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pilo

Fader performance and "dust protection"

4 posts in this topic

Hi everyone!

I don't really know if I'm posting in the right forum, but as it concerns fader performance with old MB_MF module, I choose this one.

About 10 years ago (I register here in october 2002... I was a young guy at that time :)), I started building a midibox LC. I was short on money, and so I tried to buy the cheapest part I could find. I got my motor fader for $5 each, in an online surplus shop (can't remember where... it was posted here somewhere). They are ALPS 100mm, but without touch sensor, I don't know where they came from (I don't know if they were used before or not). They have a "dust cover" (the black plastic film).

Anyway, at that time, I built the MF module, and many other stuff, just tried to see if everything works, and put this in a box for about 8years. Took me time to get back on this project, and now I'm rebuilding it.

So here I am, with a new core, DIN, etc and yesterday I solder everything back for the motorfader. But they are not working very well at all. I have to put a "very" high voltage with the LM317 (between 10 and 12v) to get all the fader to move properly. With 7.5v, some can't reach their target position at all.

One behave very poorly, and I notice that the dust cover seems to block it (during my old test, I tried different setup, building a frontpanel from cardboard to hold the fader, and maybe this has made the plastic film to go inside the fader slot). So I tried to remove it (the dust protection) to see if it makes things work a little better. And that's what happened. The worst fader, without protection, moves really well compare to the other.

So here's my question : do you think I can remove this black plastic on every faders without decreasing their life? (Yes, I smoke...).

I saw that some alps fader are sold without this protection?

Thank you for reading!

Pilo

Here's some pics of those faders

post-3472-0-22404500-1347891765_thumb.jp

post-3472-0-25503200-1347891773_thumb.jp

post-3472-0-04408400-1347891785_thumb.jp

Edited by pilo

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That should actually not be a big deal. If in doubt, place a dust cover over the unit whenever it is not used and you're as good as with these plastic things.

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Thanks for this fast answer! ;)

If in doubt, place a dust cover over the unit whenever it is not used and you're as good as with these plastic things.

Yep! But it doesn't have a case yet (that will be another problem... lol).

Nobody as used alps fader with those plastic cover?

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Here's a video showing the different behaviour of the faders with and without dust protection... No need to test more I think, I'll remove it on all faders.

Edited by pilo

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