First, lookup the recommended surface speed in Table 1 for a 1” HSS endmill cutting aluminum (V ≈ 250 ft/min) and calculate the spindle speed from Equation 2 using the aforementioned 75% speed reduction:

TIP: Plunging should generally be performed at 75% of the speed and 25% of the feedrate of the calculated peripheral cutting parameters.

First, lookup the recommended surface speed in Table 1 (V ≈ 250 ft/min) and calculate the spindle speed from Equation 2:

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* multiply feed values in table by 0.5 for difficult to machine materials, flexible toolholding or workpieces, or lighter-duty machines*

What is feedrate

Feedrate formula for milling

TIP1: Since annular cutting is a plunging operation, it should generally be performed at 75% of the speed and 25% of the feedrate of the calculated peripheral cutting parameters (as with endmill plunging).

Cutting reliefs do not necessarily need any 3D modeling software. An image to gcode software program like our PicLaser or PicEngrave can create the 3D spindle relief gcode file from a depth map grayscale image.

Note that these speed and feed values are guidelines assuming proper (flooded) lubrication, workpiece stiffness and depth of cut.  When learning how to use the CNC, always start lower (around 60% on the spindle speed and feedrate override buttons) and work your way up as you gain confidence or purchase your own tools (lol).

ok now after change number 50 of my design I am starting to make this coin holder. I need a little help with the stars that will be secured to the blue (died oak). I am going to cut the stars out of maple using the xcarve, I am using vcarve desktop. so first thing is, dose anyone know where I can download a good 2.5D five point star that would be a good representation of the star on the flag. Two, is there a special file type I need to use with vcarve that will transfer to easel?

Example 3: Calculate the speed and feed for a HSS countersink used to countersink a #10 clearance hole in aluminum using a manual milling machine.

Next, calculate the feed rate used for plunging.  Remember annular cutters should be fed at approximately 25% of the feedrate for an equivalent sized endmill.  From Table 3, lookup the recommended feed per tooth for a 1″ HSS endmill (ft ≈ 0.008 in/tooth) and calculate the plunge feed rate using Equation 3:

The trial versions do include a limited number of projects that you can tweak and carve yourself to get a feel for that side of it.

Please begin by reviewing the comprehensive course document on this topic, as it clearly explains the process of calculating these parameters for drilling and milling operations.  The governing equations are summarized below.

First, lookup the recommended surface speed in Table 1 (V ≈ 100 ft/min) and calculate the spindle speed from Equation 2:

TIP2: When drilling deeper holes (> 3xD) without high pressure TSC (thru spindle coolant), reduce spindle speed an additional 50%.

Feedrate unit

off subject. If I buy he Vcarve program, how hard is it to learn? I don’t feel like spending 700 and not be able to figure it out.

I am making a coin holder for my friend (requested from his wife for fathers day). the coin rack will be an American flag and the stars will open up to a hidden compartment for his pistols. this I kind of what I had in mind, but I am thinking about not doing the pistol cut outs and just letting him make it how he wants it gun cutout.png1280×720 730 KB

I need a favor from someone. I am trying to do a project for a friend and I need a relief cut out of a Kimber 1911 and a Springfield XDS .45. I don’t have any 3D program to make the relief .SVG so I am wondering if someone could make the .SVG file and send it to me.

TIP: When working with plastics with good machinability, use the cutting parameters for aluminum up until the point that the plastic melts.

yea, so I am just trying to cut out a pocket in wood that will hold the pistol but the more I read what you guys are writing I am thinking I can just cut out the shape and use the “negative” shape to hold the pistol.

off subject. If I buy he Vcarve program, how hard is it to learn? I don’t feel like spending 700 and not be able to figure it out.

I have inkscape but I am not sure if there is a way to do relief cuts with that program, if inkscape can handle this can someone point me to a tutorial.

Next, lookup the recommended feed per tooth (chipload) in Table 3 (ft ≈ 0.004 in/tooth) and calculate the feed rate using Equation 3:

Just google the model gun you want in silhouette. Convert the image to vector (search for topics on that, there are plenty) and cut with easel.

A general rule of thumb for materials which are strong enough to support the drilling process is that fr is between 1 - 3% of the drill diameter, depending on the material strength.

Note that these speed and feed values are guidelines assuming adequate (flooded) lubrication, workpiece stiffness and drill depth less than 3 drill diameters (0.75″).  When applying oil manually (as in the lab), scale the feed and speed back to 60%, so N = 450 rpm and f = 3.6 in/min (final answer).

Example 2A: Calculate the speed and feed for a 1″ diameter, 4 flute HSS endmill in aluminum using a manual milling machine in lab.

If you want to find out how intuitive V-carve is for you, I suggest going to their website and downloading their Trial versions. These versions allow you to do everything except generate the gcode for your files - all vector and tool path generation, rendering of preview images, and file operations. If you decide you like it and buy a full version, all work you have done in the trial version can be used with the full version.

Next, lookup the recommended feed per tooth (chipload) in Table 3 (ft ≈ 0.008 in/tooth) and calculate the feed rate using Equation 3:

As you can see Acetal (Delrin) is one of the most machinable plastics and nylon is four times less machinable (which is why it should usually be avoided!).

Did you even read the OP’s questions? Considering his thread description “Relief cut outs” I took it as he wanted to cut out a gun shape in something. Even if he used a gun silhouette image to generate the gcode, that could be considered a depth map image if the shades were created properly. I was offering him a simple & easy option instead of using complicated 3D modeling software.

TIP2: Do not plunge an annular cutter at a feedrate less than 0.001 ipt (inch per tooth) in strain hardening materials like 304 stainless or titanium.

Why not make it easy on yourself. Michael’s has bagfuls of wood stars of different sizes. Instead of putting wear and tear on your X Carve (not to mention your mind), just get a bagful.

yea, so I am just trying to cut out a pocket in wood that will hold the pistol but the more I read what you guys are writing I am thinking I can just cut out the shape and use the “negative” shape to hold the pistol.

I was really hoping one of the masters (you guys) had some magical way of doing this simply…ha ha guess not. thanks for the help, I will look and see if I can find the model of the two pistols.

Example 5: Calculate the speeds for parting off 1” diameter aluminum and 1” diameter mild steel workpieces on the lathe using the standard carbide part-off inserts.

Note: since applying oil manually, scale the speeds back to 60%, so NALUM ≈ 1425 rpm and NSTEEL ≈ 570 rpm (final answer).  Note these are MAXIMUM values and lathe chuck safety must take precedence; spinning the lathe chuck at 570 rpm is about the upper limit of what we safely do in the lab, so for smaller or easier to machine workpieces, DO NOT EXCEED 600 RPM regardless of the calculation results, unless you are running a collet chuck.

TIP: Reamers should generally be run at half the spindle speed and twice the feed per revolution of the equivalent sized drill bit.

Example 2B: Calculate the speed and feed for a 1/2″ diameter, 3 flute carbide endmill if peripheral and plunge cutting in aluminum using a CNC milling machine in lab.

What is feed in machiningformula

Next lookup the recommended feed per revolution for the drill bit in Table 2 (fr ≈ 0.004 in/rev) and calculate the feed rate using Equation 3:

Every metal cutting operation requires selection of proper cutting parameters for success.  As a DML TA, you need to understand basic calculations that will allow the tools you use to work as intended.

What is feed in machiningcnc

TIP: Countersinking should generally be performed at 25% of the speed and the same feed per revolution as the equivalent sized drill.

Feedrate formula

TIP: IF this was being performed on a CNC lathe, typical parting feed rates vary between 0.001 in/rev (for steels) and 0.005 in/rev (for plastics).  But remember, do NOT use the power feed when parting on a manual lathe unless you own the machine!

First, lookup the recommended surface speed in Table 1 (V ≈ 625 ft/min) and calculate the spindle speed from Equation 2:

First, lookup the recommended surface speeds in Table 1 (VALUM ≈ 625 ft/min, VSTEEL ≈ 250 ft/min (notice the 2.5 multiplier))

the example you provide for the pistol part can easily be cut doing 2.5D, or even 2D operations, i.e. simple cutouts. Depending on the type of foam you’ll use I’m not sure a cnc mill is the best tool for the job. There’s also a hot wire cutter or even a simple knife to consider. But if the foam is dense enough maybe an Xcarve could work too.

What is feed inlathe machine

Note that these speed and feed values are guidelines assuming adequate (flooded) lubrication and workpiece stiffness.  When applying oil manually (as in the lab), scale the feed and speed back to 60%, so N = 330 rpm and f = 2.0 in/min (final answer).

A pocket is 2D. but if a black & white image is blurred, it adds grayscale to it, so a 3D relief gcode can be created from it with an image to gcode program.

Cuttingfeeddefinition

First, lookup the recommended surface speed in Table 1 (V ≈ 250 ft/min) and calculate the spindle speed from Equation 2:

Example 4: Calculate the speed and feed for a 1″ diameter, 6 flute HSS annular cutter in ¼” thick aluminum on a manual milling machine in the lab.

Note that these speed and feed values are guidelines assuming proper (flooded) lubrication, workpiece stiffness and depth of cut.  When applying oil manually (as in the lab), scale the feed and speed back to 60%, so N = 570 rpm and f ≈ 18 in/min (final answer).  Note also this problem assumes we peripheral milling versus plunge milling (since we never teach the students the latter in lab).

Next lookup the recommended feed per revolution for the equivalent size drill bit in Table 2 (fr ≈ 0.006 in/rev) and calculate the feed rate using Equation 3:

Note: when applying oil manually, scale the feed and speed back to 60%, so N ≈ 420 rpm and f ≈ 4.8 in/min (final answer).  This is close enough to 500 rpm that I would first try this tool at the low end of high range with good oil application and see how it goes.

The only size limit on the Desktop version is in the “tile size” you can make. You can design a bigger project and cut it in sections.

The table below contains a recommended surface speeds for common materials when using DML equipment.  These values are conservative because our primary goal is fostering a safe learning environment (for our users and our tools!), not trying to squeeze every second out of each operation.

TIP1: Recommended peck depth when drilling less than 3xD (e.g. 3 drill diameters) with flooded coolant is one drill diameter, or when applying oil manually, or under low pressure, is 50% of drill diameter.

Hi Cole, what are you trying to make exactly? If you’re just cutting a pocket in foam you may only need the profile shape and could cut it using Easel. If you need a rough 3D shape you may be able to find a 3D file and then use a program to create the set-up. If you need a highly detailed 3D part milled out I’m not sure how you’d get a 3D file without the manufacturers data or a high quality scan.

Note that these speed and feed values are guidelines assuming adequate (flooded) lubrication, workpiece stiffness and drill depth less than 3 drill diameters (0.75″).  When applying oil manually (as in the lab), scale the feed and speed back to 60%, so N = 900 rpm and f = 3.6 in/min (final answer).