## Belt Forces |

Notes:

1) Belt forces are always with respect to __one__ belt

2) Drive Pulley Force, F_{DP} = 2F_{p}, or the
acceleration force, F_{a}, whichever is greater

The Belt Preload Force, F_{p}, can be set as an absolute
value, or as a percentage of the maximum belt force excluding
preload, F_{b0}.

Given:

F

_{a}= 500 N F_{t}= 200 N F_{g}= F_{cb}= 0

Example with Belt Preload Force, F_{p}=700 N (an
absolute value)

- F
_{p}= 700 N - F
_{b}= 700 + 500 + 200 = 1400 N

Example with Belt Preload Force, F_{p}, as 80% of
maximum belt force excluding preload, F_{b0}

- F
_{b0}= 500 + 200 = 700 N - F
_{p}= 80% x 700 = 560 N - F
_{b}= 560 + 500 = 1060 N

Symbol | Description | Units |
---|---|---|

F_{b} |
Total net force applied to belt | N |

F_{p} |
Preload tensile force | N |

F_{g} |
Force due to gravity | N |

F_{t} |
Thrust force | N |

F_{cb} |
Counterbalance force | N |

F_{a} |
Drive pulley acceleration force (force required to accelerate all masses and inertias including load, belt and counterbalance masses, plus driven and idler pulley inertias) |
N |

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