Why are the two halves of the zip tape separating, causing the teeth to be seen when the leather / fabric is stretched to fit the seat?
Sewn coil zips are more loose than S type zips. Check that an S type zip is being used for best results.
Why do the lengths of the different zip sides not match when attaching the different sections / doors of the item to the base frame unit?
If a product is constructed using two separate processes with the left side of the zip in one process and right in the other process and the zip sides are not matched against their original opposite side, either a special interchangeable zip is required, or the two zip halves / products should be matched at […]
What is the optimum speed of an embroidery machine to obtain optimum embroidery quality?
Depending on some aspects, embroidery machines run best at an average of 600-700 rpm.