Questions tagged [cnc]

Computer Numeric Control (CNC) is the automation of machine tools that are operated by precisely programmed commands encoded on a storage medium (computer command module, usually located on the device) as opposed to controlled manually by hand wheels or levers, or mechanically automated by cams alone. Most NC today is computer (or computerized) numerical control (CNC), in which computers play an integral part of the control.

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150W laser cutting various materials

I have a few materials that I would like to get cut (in precise shapes that I cant do on a saw), these are Quartz glass (1mm thick) alumina wafer (1mm thick) (AL2O3) copper coated alumina (2mm thick) ...
user1402154's user avatar
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Workholding vacuum only on a portion of the workpiece

Consider an almost-rigid part on a vacuum table. There is a flat gasket underneath the part that exposes some portion of the bottom side of the part to vacuum. Let's say 50% of the bottom surface is ...
Brian Bell's user avatar
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Some questions about linear rail systems

there are many linear rail system configurations. Some with only one lead/ball screw in the middle and a moving platform with wheels aligning outside/inside/on top of one/two framing rail(s). Others ...
lovedrinking's user avatar
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74 views

Choosing Between CNC Lathe and Mill for my 3D Parts

I am on the verge of producing two parts in CNC Type III anodized aluminum, and was wondering what all your thoughts would be on whether to produce the parts on a CNC lathe or a CNC mill. It is quite ...
Dorian Surcel's user avatar
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Fabricating a Strong Hub Shell for a Bicycle

I'd asked this question over at SE Bicycles but they think this is more an engineering question. The flange on my hub broke and I'm having to get one fabricated. The part is actually a cage that ...
Laoshi's user avatar
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Fabricating a Strong Hub Shell for a Bicycle

I'd asked this question over at SE Bicycles but they think this is more an engineering question. The flange on my hub broke and I'm having to get one fabricated. The part is actually a cage that ...
Laoshi's user avatar
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How do I unminify a DXF file that appears to be minified?

I have tried so many different programs to convert this file to correct, but what I have is a DXF of an eagle. It appears to be minified in some fashion or created in some non-standard CAD program. ...
Joel Mason's user avatar
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50 views

What elements should I include in a manufacturing sketch?

I have created a model of a tea strainer in fusion 360 for this (https://www.taotealeaf.com/tao-tea-tumbler/) tea tumbler of which I would like to fabricate a prototype. I will most likely make it out ...
Andrew Jackson's user avatar
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24 views

High RPM CVT for Spindle Motor

I have been messing about with a 20k RPM spindle motor and want to try to have some more low end torque. I was thinking about using a belt or chain CVT so I can smoothly change gear ratios but is ...
Phaselancer's user avatar
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31 views

Issues communicating PoKeys57CNC and Mach4 running on Windows 11 Home PC in Custom Shell Kiosk Mode

Some background Information I am using a Windows 11 Home PC to control a plasma cutting machine. The windows 11 machine uses Mach4 as the interface for controlling the plasma cutter and a PoKeys57CNC ...
Mr.J 01's user avatar
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What is the smallest standard CNC tool holder

I am looking at making a small CNC drilling machine for light duty PCB drilling. I would like to include a tool changer. I've been looking at tool changers and tool holders and they all seem massive ...
Ron's user avatar
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CNC a hemisphere in SolidWorks

Dear all, I am currently learning CNC Milling software. I have successfully be able to simulate the toolpath for milling a square block to a hemisphere. May I ask how to add another operation, that is ...
Maximus Su's user avatar
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32 views

CNC Mill an Airfoil Shape in MasterCAM

I have this airfoil shape which I created using MasterCam. I used the milling function called MULTISURFACE. When I select the green highlighted spot above, it will throw me an error. Is there a way to ...
Maximus Su's user avatar
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2 answers
67 views

Is it acceptable to use a hand reamer on an X-Y CNC machined hole?

I would like to seat some bearings into a piece of aluminum, and I only have access to a small CNC machine. The CNC has ball screws and is calibrated to maybe 50um error in the actual travel on x and ...
user391339's user avatar
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Tnc640 dnclib libraries

In order to obtain real-time data from the CNC machine, a C++ code was previously developed, and using it we were able to get real-time data from a 530 5-axis machine. 1HeidenhainDNC172 2RemoTools ...
Ahmed Can Unbay's user avatar
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1 answer
38 views

What's the best way to zero a mill using a hole on the SIDE of the part

Lets say I have a block of metal clamped in a vice on my mill, and that part has a hole in the face that's facing me (parallel to the Y axis). What's the best way to zero the X axis on that hole? The ...
Drew's user avatar
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'Know how' requirements for CNC / lathe manufacturing for open hardware projects [closed]

I've been asked to peer review a paper where the authors claim to be presenting an open source hardware item that is to be manufactured of aluminium using "CNC milling machines" or "...
WildCat's user avatar
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Cutting carbon fiber plate with a sub-mm end mill

I have a 2 mm thick high-quality carbon fiber composite sheet. I want to cut a shape in it with a 0.8 mm diamond flute end mill. I need a cut this narrow because of the shape's detail. The shape's ...
scriptfoo's user avatar
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Automatic letter connection for plasma cut parts with nested holes

Something I'm consistently running into as an issue is connecting letters so they don't fall out or leave a missing unconnected hole in a letter that is cut out of metal. Is there a way to ...
Loie Benedicte's user avatar
2 votes
1 answer
22 views

Asymmetrical collet nut snaps end mills

Could you clarify my suspicions. My spindle (HY HUANYANG, model: GDZ-80-2.2A) has come with a collet nut which has bizarre asymmetrical form of the supporting ring inside it (the ring for collet ...
Vitalii Sadovshikov's user avatar
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Which CNC gantry support shape is more ridgid?

I'm in the process of designing a small CNC. There are two styles of side plates for supporting the gantry. The first one has an angled corner cut on the front, while the other has a backslash shape. ...
user148298's user avatar
1 vote
2 answers
66 views

Why continuum robots aren't common on CNC machining processes?

So, I was searching on google/youtube about minimally invasive procedures and its tools to reach deep and delicate spaces of the human body, and it came to my mind the possibility of using it for CNC ...
Fulano's user avatar
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Reasonble position tolerance for 1.5mm dowel pins?

I am quite new to CNC machining and want to design two parts which should be accurately aligned with each other. I searched online and many people suggest the use of two dowel pins to align the parts, ...
raisyn's user avatar
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I am getting error "G-code error: Bad character '\357' used" on my tormach 440 after I import gcode, why is this happening?

I am getting "10:39:49 | G-code error: Bad character '\357' used" in my class's Tormach 440 console when I import my code. Does anyone know any potential causes to this? Edit: I don't know ...
Saturn's user avatar
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274 views

Calculation of Cutting forces (tangential , feed and normal) in CNC Milling Process

I am doing my fyp project on 5 axis cnc milling machine.I need to calculate forces on each axis as mentioned in the below picture I first calculated spindle power from https://www.machiningdoctor.com/...
Hamza Zaheer's user avatar
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1 answer
85 views

What process is involved in freeform 3D tube bending?

I have seen 3D freeform tube bending in videos such as this, this, and this. I would like to ask what process is involved in such machines. I can see a swivel mechanism used for bending. What is it ...
CaTx's user avatar
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0 votes
1 answer
812 views

How to interpret general tolerances (e.g., ISO 2768)

I am quite new to mechanical engineering, but currently working on a project which I eventually want to sent to a CNC service for machining. Many services I found can manufacture to, e.g., ISO 2768-m ...
raisyn's user avatar
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0 answers
27 views

Handling bad g-code in typical CNC machines based on G02 example

I take the following example g-code https://howtomechatronics.com/tutorials/g-code-explained-list-of-most-important-g-code-commands/ ...
Fedor  Petrov's user avatar
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Does there exist a type of metal serrated sheet to place between two mating surfaces?

I'm trying to design a bolted joint between 2 aluminum members that will not shift in sheer under vibration loads. The two straight members form a cross shape. Right now there are simply tight ...
Drew's user avatar
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Machining: Seeking Porting Tool for Milling Female 37deg Flare Ports

Been looking for a COTs carbide/ HSS cutting tool for milling standard 37 deg flare fluid ports, but am struggling to find anything applicable. Since these are common enough fluid fittings, I figure ...
Austin Prater's user avatar
0 votes
1 answer
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Disk of solid wood debris on a 0.8 mm end-mill

The machine makes a cutout in a 6 mm-thick piece of hard maple using a 0.8 mm end-mill. The end-mill accumulates a quite solid disk of wood debris. It has the consistency of soap and looks like a fine ...
scriptfoo's user avatar
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2 votes
1 answer
310 views

Actual Chip Thickness Calculation for CNC Machine Endmills

Have a look at this image: this image is from: https://www.guhring.com/Tech/endmillcalc I would like to know how the formula for the "Actual Chip Thickness" is done In this case, it is 0....
DarkPh03n1X's user avatar
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53 views

Which method is suitable for manufacturing this small scale geometry?

I want to have a channel manufactured in the dimensions shown in the picture. Which method is suitable for it. I think CNC can not achieve to work in such small scale. That rectangular prisms with 1....
CaptainCombo's user avatar
0 votes
1 answer
111 views

Max length of 12mm OD steel rod for CNC axis [closed]

Standard rod used for CNC guides, outer diameter: 12mm. Material: Ck55 steel, hardened to 60 HRC (according to store) What would be the maximum length I can have before the rod starts to bend? The ...
Alex's user avatar
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Does this CNC machine exist?

About ten years ago I had an idea for a cnc machine that was meant to basically use multiple axis to airbrush finished milled or printed 3d objects. I still have my detail drawings i worked up for it. ...
Benjamin Barney's user avatar
-1 votes
1 answer
143 views

Is G-code used also in NC or just in CNC machines?

I am trying to really understand the difference between NC and CNC machines (not just to see the "old dark-green display" to know that it is an NC machine). On the web people are saying that ...
elano7's user avatar
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2 votes
0 answers
56 views

Did I buy the wrong SBR rails? They don't seem to attach or align

I have bought some SBR12 rails and bearing blocks in an attempt to make a fancy flatenning jig for my router. I haven't been able to see 100% everything that other people have done on the YouTubes due ...
physicsboy's user avatar
2 votes
0 answers
23 views

Is it possible to have a reference pulse interpolator for a CNC machine with dc drive?

Is it possible to have a reference pulse interpolator for a CNC machine with a dc drive? it should work with alternating current drive but I am not sure about the direct current drive. please help me ...
Satya's user avatar
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1 vote
0 answers
344 views

Active noise canceling for CNC enclosure

this is my first post here! I wanted to share my ideas for this and get some input on them. My parents were kind enough to let me put a cnc machine in the loft. (shapeoko 3 xxl) In order to make them ...
Perch Perkins's user avatar
1 vote
2 answers
175 views

Professional threaded insert in plastic?

I'm getting some plastic parts (made with HDPE) CNC machined. A few of these parts require the addition of threaded inserts. I've printed the parts myself using a 3d printer and when I add the ...
Jason Easton's user avatar
0 votes
1 answer
49 views

Software correction of CAD or Gcode based on machine measurements

I own a CNC machine (Shapeoko 3 XXL) which I use to make projects that require good 90° angles, and I have been through several steps of improvement/calibration of the machine that are described in ...
adrienlucca.net's user avatar
1 vote
0 answers
120 views

Design a Jig and Fixture for 3-axis CNC Milling Machine

Newbie Here!!! This is my assignment task. I am required to design a Jig and Fixture for 3-axis CNC Milling Machine. The workpiece will be a simple aluminium block and it will be cut and shaped into a ...
JUZ Aviewer's user avatar
2 votes
0 answers
79 views

What is an "Optical Axis Rod"?

I'm in the process of designing a CNC/3d printer and I came across the term "Optical Axis rod" which seems to be the "standard" rod printers like Prusa use. But I can't find ...
Beacon of Wierd's user avatar
2 votes
2 answers
137 views

Why are entry-level CNC mills cheaper than entry-level manual mini mills?

Having used some big, old, manual Bridgeports in school, I was looking into getting a small mill (manual or CNC) for hobbyist home use on metal and wood. I was surprised to see many CNC milling kits ...
rfii's user avatar
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0 votes
1 answer
122 views

How to calculate value of force required to move CNC rounter? [closed]

I want to design CNC rounter. I want to know how much force required to move router in to material. How to consider this. I guess there are many factor like Material Feed rate Depth of cut number of ...
M lab's user avatar
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1 vote
1 answer
58 views

Precision of a steeper motor and gears vs multiple motors

We are a student team trying to design a low cost CNC plasma cutting machine. The CNC will be a table with two rails and a bridge moving on them in which the head of the plasma torch will be. Now we ...
Alejandro Guzman's user avatar
1 vote
1 answer
191 views

CNC side linear rails

I've been wondering why most (hobby) CNC machines have two actuated linear rails like this: Besides the extra force for moving the spindle, is there a need for both rails to be actuated? Could the ...
John M.'s user avatar
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-3 votes
1 answer
58 views

Vertical cnc or skipper

We are going to be increasing our capacity in our component company next year and I am looking for a little advice. We are thinking about using our loader/unloader CNC for cutting part outlines only ...
NGrimberg's user avatar
2 votes
5 answers
152 views

Low cost molds. Can such molds be produced?

I recently found the following link https://anglingai.com/224b-4-4-blood-line-swim-bait-mold/. There you will see that they sale hundreds of different aluminum molds related to fishing. These molds ...
Efthymios Kalyviotis's user avatar
1 vote
5 answers
385 views

What is a purpose of learning G-code?

I might be wrong here. The solid modeling done in CAD like Catia, NX, Solidworks,etc can be taken as input in CNC and the desired shape and size of piece can be obtained.The CAD itself convert the ...
Auberron's user avatar
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