﻿ FeedBack | Master Machine Angle Slider

# Feedback | Master Machine Angle Slider

### Master Machine Angle [ MMA ]

The Master Machine Angle [MMA] 'beats the drum' and is the reference angle for all kinematically-defined chains.

The Master-Machine-Angle has a range of 0 – 360. It represents one Machine Cycle.

MechDesigner evaluates the position [as well its velocity and acceleration] of each Part in each kinematically-defined chain to be a function of the value that is in the data box and its kinematic mathematical functions.

The position, velocity and acceleration values are 'evaluated' with kinematic equations. They are not 'interpolated' from other values.  This is important.

Home the Master Machine Angle.

The Revs and the MMA become zero when you use Run menu (or toolbar) > Home

Cycle the Master Machine Angle

When Run menu (or toolbar) > Cycle command is active, the:

 • RED arrowhead , below the GOLD MMA Slider Scale, moves at a constant rate from 0 to 360, again and again.
 • Digital Readout Read/Write data-box gives the exact value of the MMA.
 • Revs box gives the number of times the MMA has completed one Machine Cycle.

Edit the Master Machine Angle

When Run menu (or toolbar) > Cycle command is not active, the Machine is not cycling. It is then possible to evaluate the value of the MMA in two ways:

EXACTLY

To move the model with the Master Machine Angle to an exact Machine Angle:

 • Enter with your keyboard any value in the Digital Readout Read/Write data-box to move the MMA to exactly that Machine Angle
 • Click the top left or right arrow button in the Spin-Data Control to step the MMA by one increment forward or backward - as defined by the spin-increment.
 • Hold your mouse-button-down on the Spin-Data Control button to increase or decrease the MMA, with steps as defined by the spin-increment.

APPROXIMATELY

To edit the Master Machine Angle approximately:

 1 Move your mouse pointer inside the GOLD Master Machine Angle Slider.
 2 Mouse-button-down
 3 Drag your pointer to the left or right

The Red Triangle moves to the left or right as you drag your mouse.

All kinematic-defined chains move instantly to the MMA as you drag your mouse.

Help Files for MechDesigner and MotionDesigner 11.1 + © Machine, Mechanism, Motion and Cam Design Software by PSMotion Ltd