Running a shaper - the compound

[f350ca]

The tool slide should have a lock on it, same as the axis on a mill or the cross feed on the lathe. (one of the gib screws with a handle) Run with it snugged up unless your cutting a vertical surface where your feeding the tool down. I don't think its pull from the tool per say that causes it to feed deeper, a constant load on the thread won't make it turn, but there is always come chatter from the cutter, (if there isn't your not working it hard enough) and the load unload action of the cut, tends to make the cutter to drop.