Auto Levelling

Draw frame is the best sliver regularity. By the use of servo motor draft is controlled in drawing for constant count. Controlling draft by servo motor of this program is called Auto Levelling. Auto Levelling is done by two ways.

  1. Open Loop.
  2. Close Loop.
Open Loop: When action and sensor senses the feed count on the feed material to changes the draft is know as open loop.

Close Loop: Sensor sense the delivery count and send this sense to feed in this process and draft is changed accordingly is known as close loop.