Linear Coupler Mate

Makes one part slide along its line as another slides along its own, by a ratio of the two distances.

When to Use It

Open an assembly (assemblies need the Pro plan) with at least two components in it. See Assemblies: Start and Insert Parts.
Click Mate on the Assembly tab (or right-click a component and choose Assembly tools, Mate...), then click the Mechanical tab at the top of the window.
Click a straight edge or a round face (its axis is used) on one component. It shows as First direction.
Click a straight edge or an axis on a different component. It shows as Second direction. At least one pick must be a straight edge. Two round faces are not offered a Linear Coupler.
Click Linear Coupler.
Under Distance Ratio type the First distance and Second distance. They start at 1 and 1.
Tick Reverse if the second part should move back as the first moves forward.
Click the green check.

First distance and Second distance: above 0 and at most 1,000,000, and neither more than 1,000,000 times the other.
Reverse: the second part moves the opposite way.
Use for positioning only and Make first selection transparent work as on the Standard tab.

It does not hold the parts on their lines. Mate each part to a track as well.
Parts that also turn while they slide are read by the movement of the picked point, so use it for parts on straight tracks.
The tree shows the ratio, for example LinearCoupler1 (1:2.5, reverse).

Every button is grey. The picks do not fit any mate on this tab. The status line says what is missing, for example "Pick more entities." Remove a pick (click it again or press Delete in Mate Selections) and try again.
"Collapse the exploded view to add mates." Mates cannot be added while the assembly is exploded.
The Over defined prompt appears. The new mate conflicts with the ones already there. See Mates: Fixing Mate Problems.

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