WorkerB Hesitation & Blowing Fuses (110v Power Pack)

The jerkiness of the motor is part of the design. "Phase cutting" and "pulse DC" are not "pure direct current", so it is quite different than just applying straight DC current to the motor. By design, there will be slight jitters when the motor is not attached to the machine (when it is not under load). But when used as intended any jitter in motor operation felt (e.g. if you happen to hold the motor while operating) will never be noticed while sewing. The unique design of the WorkerB Power Pack is what allows it to “Power Boost” when the machine and motor encounter resistance.

But through sudden movements of the foot pedal to operate the motor, especially when not attached to the machine, it is feasible to blow the protective fuse in the WorkerB Power Pack. This has nothing to do with the jitter described above. Instead, it is simply a sudden excessive rotation speed that can create large amounts of rotational inertia. To avoid blowing fuses always make smooth linear speed changes when operating the sewing machine – Don’t stomp on the foot pedal quickly.

Regardless of your operation style, pedal stomp or not, we built in a "slow start" protection device to mitigate this issue. But we did not want to create too dead of a start feel so we kept it very small. Under normal sewing operation, this delay to operation is not noticeable given the normal action of slowly depressing the pedal to start sewing.

And if needed there is a way to reset parameters within the WorkerB Power Pack. Excessive fuse-blowing issues can be solved by adjusting the min and max pot settings. If you are blowing fuses frequently, yours may have been set too high initially.

We would recommend getting your WorkerB Control Box sent into Sailrite's facility so one of our Machine Techs can make the required adjustment. Please respond to your open support case for further information on how to send your WorkerB Control Box, Motor, and Foot Control in for this service.

Note: This video is not searchable on the Sailrite website. The URL link (web address) is usually giving out via a Sailrite Support Case. To access this video again in the future you must use this same URL link.