Question On Pfaff 145 Skipping Stitches

[Fat Dog Leather]

Need some advice please... My Pfaff 145-P-6C sews beautiful until it skips random stitches. Usually in prominent locations! Leather material used is 3 - 5 oz in weight, thread 69 top & bottom, needle 190LR - 125/20. Tried a larger needle with same results. Machine was recently serviced, no issues noted. It has been around a while used hard in a canvas factory. Any suggestions on what to try as I am very frustrated. Thanks!!!

[TinkerTailor]

One thing that can cause this is not enough foot pressure, if the work lifts the foot because the needle is in a tight spot, thread tension could momentarily get released, causing the skipped stitch.

[Wizcrafts]

Another cause of skipped stitches can be glue or double sided leather tape clogging the eye of the needle.

[Fat Dog Leather]

Tinkertailor and Wizcrafts;

Thank you both for your suggestions ..... I will try them out!