Stairmaster

How does the Stairmaster work?
Does it control speed, force. or what? Does
it operate open loop, or does it monitor and
adjust to the effort and speed of the user?
--
Rich
Reply to
RichD
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Good Q, dunno....
Better are their StepMills, which are like rotating staircases. Presumably all that varies in these is speed.
The best choice is the (free) staircase of a tall building. Infinitely more versatile, effective than these expensive contraptions -- $5K+..
Reply to
Existential Angst
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Some of these are controlled for constant power. They have a small alternator with a resistive load. The controller monitors the load power (probably voltage into a known resistance) and varies the alternator field. I can feel the decrease in torque as I increase my cadence (speed) on a cycle. Hence my conclusion that these are constant power.
Some step machines prompt for the users weight and a speed setting. With these, it is possible to increase one's cadence above the setting and walk off the top of the machine. These might be constant torque systems, controlling the field based on power and RPM.
Some of these (many stair machines) plug in and just drive the steps at a constant selected speed.
Reply to
Paul Hovnanian P.E.
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Again, there is no "Stairmaster"; which product are you referring?
Which product are you referring?
Reply to
MU
Again, there is no "Stairmaster"; which product are you referring?
Which product are you referring?
Reply to
MU

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