So for example if you want to make a slot cut then the full 100% of the bit is cutting. Next to it is the purple switch that picks the WOC (width of cut) as a percentage of the bit diameter. The dark brown toggle sets the DOC (depth of cut) in 0.01 increments. The light green toggle sets the number of cutting edges or Flutes of the bit. Here we can select our bit diameter 1/8th, 1/4th, 3/8th and 1/2 inch bits. Just to the right are a pair of dark green toggle buttons that will increment/decrement the desired Chip load by 100th in. You can also manually type in a value in the dark blue box. Starting with the blue slider you can adjust the router/spindle RPM. To the left of the readout sections are all the controls to setup an operation.
I was actually surprised how many times I tripped that flag when I was testing out different configurations. Finally, I thought it would be useful to convert into Wattage and that box will turn red if it exceeds the Wattage limit you entered in the spindle section. This value is directly related to the amount of HP required and that is calculated and displayed. how much material is being removed per minute. The top row shows the SFR (Surface Feed Rate or how fast the bit cut edges are moving, MRR is the Material Removal Rate i.e. The DOC (Depth of Cut), WOC (Width of cut) the Feed Rate, and a suggested Plung rate. The top right section shows the results and conditions for our milling operation. In the full version, all the settings for a particular cut use the interactive slider and toggle buttons. And that’s all the information needed to configure the calculator to match your setup. But you can adjust these limits at any time. The power of the spindle will in most cases be the limiting factor anyway. As a practical matter considering this is a “Hobbyist” level machine I would think a limit of 200 in/min. We will have to learn what the limits are. stiffness of the machine will limit the actually cutting speeds. the Onefinity specification for X/Y rapid rate is 500 in/min. I of course put in the Onefinty but had to guess on the feed rate limits. Since I choose an 800W spindle to test out that is what I left in as default. If you wanted to use this router you would put in 0.932 KW which is the equivalent of the 1.25 HP of the motor. The Makita has an RPM range of 10K to 30K. So yeah I put some defaults in this section. On the other hand there always seemed to be a solution that was a compromise of adjusting the feed rate or spindle speed. One factor I didn’t consider before was the power of the spindle and how it can limit certain types of cuts. As I used the tool for different types of cuts I was surprised how it showed the strengths and weaknesses of both. When I started developing this tool I had the idea it would maybe show if it made sense to go with a spindle. I entered an 800W spindle which is what I was thinking of upgrading to. I have two sections for spindles so you can compare say the Makita RT071C against any other spindle you might install. The left side is where we configure our router/spindle limits.
Hopefully, after showing a few examples it will become clearer. Probably another article down the road explaining the terms but for now, I want to show the sections of the tool. I am going to throw around a number of terms and if you are not used to seeing them I suspect it might be a little confusing. This is a snippet of the top section of the full version.
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Also, downloads for Free “Limited” and “Lite” Versions. Link to CNC Explorer 1.0 Introduction and Purchase. I am happy to announce Explorer 1.0 has launched! Again that you for your interest in my tool. Adding a section allowing some custom materials. It has inspired me to work on an upgraded version with additional features like compensation for Chip Thinning, better user controls, more warning flags. I received many compliments and comments on the tool and some suggestions for enhancements. Many many thanks for coming to my site and downloading copies to explore CNC settings.
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