Does the speed of my machine affect the stitching quality?
Absolutely. The first three to five stitches are tie-in stitches and give the machine enough revolutions to catch the upper and bobbin thread and combine them. The machine may skip these first few stitches at high speeds.
When the speed and the force on the thread increases, failing to adjust can cause the machine to create a tighter stitch. Satin stitches can be thinner and gaps can appear between any outlines and their adjacent fills or satins. Speed can also cause stitch distortion.
That said, a design that has been digitized correctly, backed and hooped correctly, running on a machine that is threaded, time and tensioned correctly should be able to run at 850 spm or faster without problems.
Click here for more insight on machine speed.