I have used an 80 mm face milling cutter to machine the surface of a 200 x 170 x 30 mm aluminum plate. This is going to be a vacuum plate so it is very important that the surface is completely flat. So I have machined this in two steps, with three passes each. The last step was a pretty shallow cut.
But once I was done, I can feel that there are "steps" between each machined area. Why would that happen? Is it because the workpiece heats up and I need to cool it down for each cut? Or do I need to flood it with coolant? I hope not cause my mill isn't set up for that and it would be a huge mess. The milling machine is a manual 50 x 14 bridgeport type machine.
But once I was done, I can feel that there are "steps" between each machined area. Why would that happen? Is it because the workpiece heats up and I need to cool it down for each cut? Or do I need to flood it with coolant? I hope not cause my mill isn't set up for that and it would be a huge mess. The milling machine is a manual 50 x 14 bridgeport type machine.
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