This Step reviews the design that is necessary to transfer the label from the Transfer Tool to the Bottle.

tog_plus        Requirements Specification

To transfer the label from the Transfer Tool to the Bottle:

Make the position and velocity of the Transfer Tool agree with the Bottle

Velocities are Vectors. Hence, the velocity must be the same direction can magnitude.

We can satisfy the motion conditions if we roll, without slipping, the Transfer Tool along the Bottle


Available Design Variables:

Shape of the Transfer Tool  NO: The shape of the Transfer Tool was set in Step 6B.5.
Motion of the Transfer Tool
Shape of the Bottle Tool - NO: good luck with the Marketing Department if you want to change the shape of the bottle.
Motion of the Bottle

Note that the Transfer Turret rotates in the opposite direction to the Bottle Turret. This means that the tools move in same directions as they pass each other.

The Bottle Turret is twice the diameter.

Summary of Transfer from Transfer Tool to a Bottle

This video shows the finished design of this Step.

Modify the Motion of the Transfer Tool so that it rolls along the Bottle
Modify the Motion of the Bottle

Note: We know the shape of the Transfer Tool and the Bottle.

Ignore the Cams – I add the Cam in the next Steps of Tutorial – I got ahead of myself.

tog_minus        Design of the Transfer of the Label from Transfer Tool to the Bottle

The Section changes the Motion of the Transfer Tool and the Motion of the Bottle.

QST5B-6-1

Q: Why not change the shape of the Transfer Tool or the Bottle?

A: We fixed the shape of the Transfer Tool in Step 6B.5.

Good Luck if you want to redesign the shape of the Bottle to suit your machine design. I would like to be a 'fly on the wall' in that negotiation!

 

QST5B-6-2

Q: What rotation motion of the Transfer Tool will roll it against the Bottle Tool?

A: We can try to do nothing!

Why? The Transfer Turret moves in the same direction as the Bottle.

In the image, the Points in the middle of the transfer Show the Velocity Vectors.

The image to the left shows the Velocity Vectors shortly before the in-line position.

Note: the Targets are not in new releases of MechDesigner.

QST5B-6-3

The image to the left shows the Velocity Vectors now at the in-line position.

The velocity vectors (Blue) are now identical:

they point upwards, and
they are the same magnitude (length)

If the vectors were a different length, two arrowheads would be visible.

 

QST5B-6-4

Q: Is that it?

A: The Zero rotational velocity motion given to the Transfer Tool leaves a GAP at ALL other points on the two sides of the 'in-line' position.

The image to the left shows the GAP between the Tools after the Turrets have moved past the 'in-line' position. There is a Gap between the tool and the magazine unless the tool is horizontal.

 

QST5B-6-5

Q: Is there a better Motion for the Transfer Tool and the Bottle?

A: Let us move the Transfer Tool and the Bottle with equal and opposite motions – in proportion to their radius at the contact point – so that they roll against each other like gears.

Now, we must add the Stationary 2D-Cams to guide the Tools with the Motions.

 

Tutorial and Reference Help Files for MechDesigner and MotionDesigner 13.2 + © Machine, Mechanism, Motion and Cam Design Software by PSMotion Ltd