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Post by Barry K on Feb 24, 2019 22:23:18 GMT -5
I have an Axion Pro 8 and have started to cut some signs and projects. I have used mostly pine as it is good to practice with. I still cannot understand the correct speeds and feeds for cutting . For example My aspire software suggests for a .025 End mill a speed rate of 12000rpm , pass depth of .125 step over 0.1 and a feed rate 100 ipm Amana tool suggests for the .025 End Mill ( Amana 46202) speed rate of 18000rpm , pass depth of .25 step over .025 and a feed rate 150 ipm
Which is right ? I sometimes get a little roughness on the edge of the first cut and other time some tool chatter Your enlightenment would be appreciated
Thank you
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Post by stevem on Feb 24, 2019 23:05:52 GMT -5
Barry: I think you mean ,25 end mill! There really isn't one correct answer for the question. If you are cutting just pine, I would set it for 100 ipm running at about 13,000 rpm and a step over of about 25% and a pass depth of .125. That always gets me a decent clean cut. With the pendant, you can always slow your feed rate down by just pressing Y- to slow the feed rate or Y+ to speed it up. If you want, you can set the feed rate at 125 ipm in the software and slow it down using the Y-. That is what I do all the time. If you're using a 1/8th or .125 end mill, you should slow the feed rate down some using the same method.
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Post by Gary Campbell on Feb 25, 2019 8:45:26 GMT -5
Barry... A few thoughts for you.
1) Aspire isn't suggesting anything, there are just values for each bit so that you could cut something. They could turn out to be correct in some cases, but they are designed to allow a new user to be able to cut, not to be a recommendation
2) You may also find that the bit mfgr recommendations are for optimum chipload, usually for big iron machines. Very few sub $30K machines can cut at optimum chiploads and maintain tolerance.
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Post by Axiom Tool Group on Feb 25, 2019 16:49:34 GMT -5
Gary is absolutely correct...
Understand that there are 100's of different machines open the market, each with different capabilities. So its not possible for Vectric to know exactly what your machine is capable of....at least not enough to suggest accurate feeds and speeds.
Many of the speeds in the software when first loaded are generic.
The best recommendation often come from the tooling manufacturer, however, as Gary said....with some manufacturers, these speeds are for much larger machines.
We have found that Amana Tool does a very good job of recommending feeds and speeds for each of there tools that are supported by our machines. Though keep in mind that with a stepper driven machine, you will have less torque for maintaining position at those higher speeds. 150inches per minute for the discussed bit is possible. However, if the lubrication and maintenance are ever lacking...the cutting forces could cause a loss of position at those higher speeds.
Personally I have found that this bit works great at about 100-120ipm with ramped plunge moves and a pass depth of 0.125-0.25 depending on the material. As for RPM, start with the recommendations and adjust based on what you see at the machine.
Chips should be nice curls that when picked up are hot/warm...since they are pulling heat away from the tooling.
If you are getting dust, then the bit is spinning too fast. If the material is smoking or burnt, then the bit is spinning too fast. etc.
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Post by Barry K on Feb 26, 2019 10:40:14 GMT -5
Thanks for your input
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