Let-off mechanism: Adjustment of the size of the let-off amount and let-off time

(1) Adjustment of the size of the let-off amount: 

    By adjusting the position of the tie rod shaft pin 

on the let-off swing lever, the change of the let-off 

amount can be realized. When the tie rod shaft pin 

is moved upward, the let-off amount will be reduced; 

on the contrary, the let-off amount will be increased. 

When the rod shaft pin downward or upward to move 

to the limit position, still can not meet the requirements 

of the process on the amount of warping, you must 

replace the feed gear, change the feed ratio to achieve 

the requirements of the process on the amount of 

warping. You can also change the number of heads 

of the feeding worm, from a single head to a double 

head, to change the ratio of the feeding speed.

(2) Adjustment of let-off time: 

    The change of let-off time is realized by changing 

the mounting angle of the let-off cam on the crankshaft. 

In general, the let-off time is set as the start of let-off 

after the card weft, and the let-off action is completed 

when the reed seat is at the rear dead center point, and 

the maximum radius of the cam acts on the rollers on 

the let-off rocking lever at this moment.