I have been asking around about feed rates and the info I have seen pretty much says to cut at the highest feed rate possible before breaking the router bit. Well I have been increasing my feed rates little by little. I am making guitar bodies. Shaping like tummy cuts and carve tops can probably get away with a little inaccuracy but neck pockets and cavity covers need to fit exactly. I have cut many guitar bodies now at feed rates around 50 to 75 IPM. These have been cutting properly, no problems. But as I have increased feed rates up to 100 and 150 IPM, I am now getting sloppy corners.
Example: In a square neck pocket with a .5" bit. The first corner where the bit plunges in looks exactly as it should with a .25" radius corner. The other corners that the bit travels through look more like .3" to .35" radius corner.
What I am wondering about is under Motor tuning - Acceleration. I had this set at 8. If I bump it up to 20, it seems that I get less deceleration going into a corner. I am thinking that with the lower acceleration one axis is starting its move before the other axis is reaching its full position.
I am going to run some tests on this but any thoughts on acceleration or anything else that may be affecting this? And are there any drawbacks to using too high of an acceleration? I will say that the movement seems a lot more jerky and maybe could be harder on the motors and parts?...