Shaft Loads     

Calculated Values

Depending on the mechanism, radial and axial loads may be generated as well as X2 & Y2 values.

How Radial [F2r] & Axial [F2a] Loads are calculated

• Conveyor
  • Generates a radial load [F2r]
• Rack & Pinion
  • No Helix angle generates a radial load [F2r]
  • Helix Angle generates both a radial [F2r] and axial [F2a] load
• Ball Screw
  • When Screw is rotating and the Nut is moving linearly generates an axial [F2a] load

How X2 is calculated

• X2 = Gearbox x2 database value, which is the distance to flange-plane at output
• Rotary Mechanism with Shaft Loads Defined in Sequence
  • When multiple radial forces and/or X2 values are defined in the sequence, then, an "effective" X2 value is calculated so that the proper tilting moment is applied to the output side of a gearbox connected

How Y2 is calculated

• Rack & Pinion and Dual Rack & Conveyor
  • Y2 = Pinion Radius
• Rotary Mechanism
  • Unbalanced Load
    • Ratio of Unbalanced Load Mass [mUL] wrt Total Mass multiplied by the Unbalanced Load Radius [rUL]
    • Y2 = mUL / (mUL + mDisc + mLoad) * rUL
  • Shaft Loads Defined in Sequence
    • When multiple axial forces and/or Y2 values are defined in the sequence, then, an "effective" Y2 value is calculated so that the proper tilting moment is applied to the output side of a gearbox connected
• Else Y2 = 0

How Y1 is calculated

• Transformation Type = Gear
  • Y2 = Drive Gear Radius
• Else Y2 = 0

How X1 is calculated

• X1 = Gearbox x1 database value, which is the distance to flange-plane at input

Apply Calculated Values for F2a, F2r

• When each of the F2a and F2r buttons is selected, the corresponding calculated value(s) are applied as the application required values.
• When a button is not selected, the application required values can be entered manually.
• If the gearbox output is not exposed to any shaft loads, then de-select the F2a and F2r buttons and enter 0 for the application required values. Ie. No shaft loads are applied.

Gearbox Rated and Required Values and Utilization

• The Rated values come from the database values, adjusted for any load factors if applicable
• Application Required Values can be the calculated or user specified
• For a Const Velocity segment, Accel and Jerk step values are also not used as Accel and Jerk are always 0