Upper Thread Tension - Butterfly Embroidery Machine (Tensión de hilo superior en la bordadora)

This video shows how to set upper thread tension on a commercial embroidery machine. Please set your bobbin tension first, which is one of our other videos in the butterflyemb channel. The sewing shots in this particular video are at double playback speed and not quite indicative of normal sewing speed.
Don't forget to set your check springs, they should be just below the topmost position or your thread may pop out at color change.
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[@fado9631]

hola, porque algunas porta bobinas llevan freno y otras no.
yo la uso en bordadora, pero no se cual sea la diferencia de usar con freno o sin freno, menciono que uso carretes de aluminio de bobina.
gracias.