In another thread the question of chip loading has again returned.
Many people swear by the necessity of getting the chip loading right.
This, as I understand it , is a combination of spindle or router R.P.M., speed of cut (IPS), the bit being used, and the material.
3 of these are constants, R.P.M.,bit and material. The fourth is a variable. You may well tell the machine to cut at 4"(100mm)ps for instance, but if it is cutting out a shape like
14550.gif, then it is likely never to reach the dialled in speed, continually ramping up and down, even stopping, or nearly stopping on many occasions.
Does this mean that, if the 'correct' chip load calculation is needed to get satisfactory cuts, any cut, other than a straight line, is going to be substandard? This is not a Shopbot problem per se, any machine that doesn't adjust the spindle R.P.M. to match the speed (IPS), (do any?) will have this problem.
In practice I see no difference when cutting, so ignore chip loading calculations, using experience instead.
.............Mike