Recent Blogs
Self-reversing Motion Contrivance: How It Works, Diagram, Parts, and Traverse Speed Formula
How a self-reversing motion contrivance converts continuous rotation into reciprocating linear traverse — used on level-wind reels, winders, and lathes.
Grooved Heart-Cam: Average Traverse Calculator | FIRGELLI
Compare average traverse speed, cycle time, nominal groove width and a selected stroke fraction. Includes an ideal heart-cam animation and explicit reversal limits.
Multiple-Return Grooved Cylinder: Travel and Cycle Calculator
Explore a grooved-cylinder traverse diagram and calculate follower travel, mean path speed, return cycles and reversal rate from stroke and drum speed.
Heart-Shaped Drum Groove: Ideal Traverse Calculator | FIRGELLI
Compare ideal axial traverse speed, unwrapped lead angle, half-turn timing and entered pin-to-groove width difference.
Cop Winder: Pivoted Yarn Guide, Animation and Winding-Speed Calculator
Explore a rotating cop and pivoted yarn guide. Calculate circumference, spindle rate and circumferential winding speed from package diameter and RPM.
Bobbin Winder: Yarn Path, Traverse and Surface-speed Calculator
Follow the yarn path from a supply cone to a rotating bobbin. Compare circumferential surface speed, spindle RPM and effective package diameter.