Melodeon.net Forums
Discussions => Instrument Design, Construction and Repair => Topic started by: mselic on July 12, 2018, 06:16:40 PM
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Does anyone know a way to lighten (reduce the tension) of coil springs for buttons on a keyboard? I’ve lightened the springs on a Hohner keyboard, but those are a different from coil springs. Alternatively, can anyone recommend vendors of different sizes and tensions of coil springs that would be suitable for a keyboard in a one-row? Thanks.
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Does anyone know a way to lighten (reduce the tension) of coil springs for buttons on a keyboard? I’ve lightened the springs on a Hohner keyboard, but those are a different from coil springs. Alternatively, can anyone recommend vendors of different sizes and tensions of coil springs that would be suitable for a keyboard in a one-row? Thanks.
Try Carini (Italian accordion parts supplier) but good luck in navigating their website; it's not the easiest!
'Spiral' springs here (http://www.carinidena.it/MS5ECOMMERCE60/jsp/eco_cc_home_bs_portlet.jsp?p=dettarti&codarti=3004).
Edit:
I see Charlie Marshall has coil springs here (http://www.cgmmusical.co.uk/CGM_Musical_Services/Springs.html). Charlie's a lot easier to deal with!
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Lee Springs have a calculator that's useful . https://www.leespring.com/
If you click on the link for "Compression springs" it will take you there.
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Never tried it, but I've been told you can insert a screwdriver blade (like a wedge) between adjacent coils to stretch the spring and make it permanently longer.
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Lee Springs have a calculator that's useful . https://www.leespring.com/ (https://www.leespring.com/)
If you click on the link for "Compression springs" it will take you there.
The springs in question are what Lee Springs describe as "Extension Springs", I think they are more commonly called expansion springs in the UK. Compression springs do exactly the opposite to extension springs.
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Never tried it, but I've been told you can insert a screwdriver blade (like a wedge) between adjacent coils to stretch the spring and make it permanently longer.
This method worked. Thanks!
Thanks everyone else for the info - much appreciated.
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Might be simpler to exercise the fingers to strengthen them up a bit
george ;)
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Might be simpler to exercise the fingers to strengthen them up a bit
george ;)
Fingers get plenty of exercise ;)
The springs on 4-stop boxes can often be more stiff than they need to be, and reducing some of that tension is usually an improvement.