cutting bit movement
I'm stumped! I set up my Skill plunge router to do some rabbeting on MDF and poplar. The poplar was done with a top-mounted bearing bit, while the MDF used both a spiral down-bit as well as a straight flute 3/8" bit.
The collet was disassembled, cleaned thoroughly, and the tightening was "vigorous". Set the plunge depth to about 1/4" and began the cut. Within the first foot or so of cut the depth had changed to over 1/2", ruining my piece. I've now scrapped three workpieces with the same issue!!
What's happening? The only way I can get this to work is if I limit the cut depth to about 1/16", which is ridiculous and time-consuming.
Any ideas as to what's causing t he problem and how to fix it? The router is old (15-20 years) but not used very much.
Any help would be appreciated!