I recently borrowed a portable fretsaw from a friend, in order to make a wooden puzzle. After completing one puzzle with no problems, I began a second, but half way through a longish cut, it stopped working - every time the wood was pushed against the blade, it caught and stopped moving up and down. I guessed that the blade was blunt and changed it, but this made no difference. I then took the saw to pieces, thinking perhaps a stray bit of wood was stopping it from moving, but there's nothing obvious. Does anyone have any ideas? The saw is a Shapercraft Model No 1000, and I believe it's around 20 years old, or possibly older. It's made by Spiralux Handtools Ltd, Gillingham, Kent. The design is an electromagnet which is turned rapidly on and off, pulling a metal plate up and down, to which the blade is attached. The top of the blade is attached to a sprung arm.
Thanks.
Thanks.