Re: Strain gauge to measure bandsaw tension

On Apr 8, 11:49 am, Eric Anderson <egand...@xxxxxxxxx> wrote:
How do you make astraingaugedevice that measures thestrain(change
in length) of a metal band by clamping thegaugedevice onto the metal
band.  Thegaugewould be an analog bridgestraingaugethat would
have to have pads that allow them to be clamped on the metal band, but
the material that thegaugedevice was made of would have to have
little effect on the total resistance to elongation of the band, since
the bandstrainvs. force is what is being measured.

I know I could glue astraingaugeon the band itself to do the
measurement, but I want to be able to mount and unmount thestraingaugeon different bands.

The actual thing I am measuring is thetensionin abandsawblade.  I
found I could buy a mechanicalstraingaugeto do the measurement, but
find that I can buy a usedstraingaugemeter for much less and if I
can make agauge, I will have astraingaugemeter for use in other
applications.  Also, I believe it could potentially be more accurate
also.


In strictly practical terms, simply to set a bandsaw, you would not
measure strain (elongation of the steel). You would measure tension
(force). Using a strain gauge as a backdoor approach to determine
tension would require knowing the coefficient that relates tension to
elongation for that particular kind of steel. I forget the
terminology. It would also require that you release the tension on
the blade, apply the strain gauge, then retighten. Do you really want
to go to all that trouble? I value my time more than that. With a
tension gauge, just apply the gauge to the taut blade.

Fine Woodworking Magazine (taunton.com) has an article about how to
make your own tension gauge. I haven't read it.
.

Relevant Pages

  • Re: Spoke tension and buckling
    ... with a rubber band around it. ... What's the response of the whole thing to compression and tension? ... when the spokes aren't slack than when they are. ...
    (rec.bicycles.tech)
  • Re: Spoke tension and buckling
    ... with a rubber band around it. ... They're in equilibrium. ... What's the response of the whole thing to compression and tension? ...
    (rec.bicycles.tech)
  • Advice for Heavy Bracelet or Watch?
    ... I just wear a watch on my left ... One possibility is a ladies sports watch that has steel in it, ... how would a beaded band compare in weight to a metal band? ...
    (rec.crafts.jewelry)
  • Re: KISS makes Top 10 & Rob Zombie tells you why
    ... Top 10 Metal Band and Most Uncool Band of All Time in the same day. ... I'll go with MTV on this one. ... I am critical of the modern day KISS, ...
    (rec.music.artists.kiss)
  • Re: OT: 20 most important bands of 20th century
    ... Band - country rock, folk rock biggies ... Can - biggest influence on alternative rock after Velvet Underground ... Iron Maiden - most popular metal band ...
    (rec.music.beatles)