Originally Posted by
jcnewbie
This my sound a stupid question, so please bare with me..
How does one calculate feeds and speeds. I know there are calculators on the net which will give you the results, how ever I would like to calculate it myself.
Please let me know if I am doing it correctly.
For all roughing operations I am assuming 240 SFM with 4 flute length , 240*4 = 960. ( should I always multiply the flute length)?Then to calculate the spindle speed I am going to round that value to 1000 and / it by the tool diameter (0.5). which equals 2000.
To calculate the feed rate I am going to multiply 2000 * 0.005(diameter of tool / 100) = 10 in/min
So for a 0.5 diameter flat endmill my spindle speed I would enter in Mastercam for the roughing operation = 2000 rpm and feed rate = 10 in/min
Am I doing this correct ?
I do not know how MC calculates F&S but what are you cutting???
Whenever I use MC I use the overrides based on Set-Up, Tool, Operation, and Machine Capability. MC F&S are usually way too slow for me.
Toby D.
"Imagination and Memory are but one thing, but for divers considerations have divers names"
Schwarzwald
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
www.refractotech.com