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feeds and speeds....
Dan and followers...Gotta start by saying I am loving the course! Lots of tips I have not seen anywhere else! Keep up the good work. I have been following the Temptress build and am simply amazed by the fine work. This may be a silly question, however I will go with it anyhow. If I follow the feed and speed program you have, there is a small discrepancy. It is not a program "fault" , I have never broken a bit..lol but I have burnt up my router. The bit slipped out and started to bore a hole to hades ..lol don't want to do that again! However, if I use the feed and speed guide, my parameters are .250 2 flute carbide downcut bit. All of the results are super close to what the mfg. of the bit states, other than the feed rate. The mfg says that 70 ipm is recommended, which I have confirmed that this is correct, and using the calculator here says 375 ipm. That is a huge difference. Getting too long winded here, but is it the bit that is not up to the standard? many of you are using spindles, maybe that is a factor as well. my machine is quite rigid, but still using a router as opposed to a spindle. Just wondering what your thoughts are on the difference in the ipm?
Thanks in advance
Todd
Hi Todd
Great to hear you are enjoying the course and finding it useful!
Could you give me a link to the manufacturers recommendation or some more info on their bits? Also could you let me have a few other details on what you are running, spindle RPM for example, cut depth etc. Also, what machine and spindle are you using? An incorrect feed and speed shouldn't be the cause of the bit slipping out so there might be some other factor going on there. Also what are you cutting?
That is quite a large discrepancy in feed rates. I am currently working on a second feed and speed calculator where by the target chip load can be entered instead of material selected (which inputs industry average chip loads). This will allow users to enter more specific chip load sizes recommended by the manufacturer and it will allow more accurate dialling in of a feed and speed specific to the actual bit you are using. This may be a useful alternative for some users.
Let me know on those points above and we'll get to the bottom of your issues.
Cheers
Dan
Hi Dan/Todd,
I can just subscribe to Todds statement about the course. I had no clue about CNC and already learned a lot.
Just a quick question about the speed and feed calculator. Is that accessible somewhere outside this course? I've seen some pictures that look as if it was a mobile app?
Cheers
Peter
For now it is only available through the course. I would recommend bookmarking the page URL on your phone so you can get quick access to it and display it on your phone as shown. I am working on developing an APP that will accompany the course and contain things like this but that will take me a little while to get ready to launch.
Cheers
Dan