Coil Loop Gap Calculator

Size the coil loop and feed slack between the straightener and feeder to keep material tension-free.

A slack loop between the straightener and the feed decouples the heavy coil from the precise feed motion. Too little loop puts tension on the feed and snaps stock; too much drags the floor.

Size the loop pit so it always holds enough slack for the feed to pull freely at full speed.

Formula: Loop must hold ≥ one feed progression of slack at all speeds

Worked Example

  1. At 1.5 in progression and high stroke rates, keep at least several inches of free loop depth.
  2. Verify the loop never goes taut against the straightener during the fastest feed.

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