Q$4.[8$ marks$]$

Refer to the following kinematic diagram $($Figure $3)$ of a horizontal axis milling machine and

answer the following:

A$.$ Identify the link element $"Z"$ as

marked in the figure and state its

function.

B$.$ Why are the clutches $($C$1$&C$2)$

after cone$-$pulley different from

those in feed gear box?

C$.$ How many speeds are possible

on the spindle?

D$.$ How does the feed transmission

take place for rapid up$/$down

movement of the knee of table?

Figure $3$