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Questions tagged [cnc]

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Limited resources for learning Fanuc Macro B programming, I need some direction as to how people learn this language

Why is it that the only 2 books on CNC macro programming are by Peter Smid and one S K Sinha. Am I looking at this the wrong way? What am I missing? Is Macro programming one single thing that can be ...
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1answer
36 views

Automating the Coolant Top-Up for CNC Machines

I am designing a liquid dispensing system for CNC machines that will top-up a mixed solution of coolant & water at the required concentration. Present concentration in the machine sump will ...
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19 views

cnctrain set xxxlink

Respectful all, I am newbie in cnc simulator software. I encounted a problem with fms unit manufactured by mtab working with relatively old version fms version 2.1 and cnctrain 4.5 both programmes ...
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1answer
39 views

Curious of drawing a hole for M3 countersunk screw, 5.5mm or 6.5mm?

Hello all I am drawing a hole for M3 countersunk screw(flathead) I have checked the specs online the diameter of the head is largest 5.5mm thick 1.65 90degree But when I draw a 5.5 hole 90degree it's ...
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1answer
29 views

How much space should I leave between round bushing and the rotating parts to minimize the play?

Hello everyone I am designing a parts that needs to rotate so I am planning to insert a round bushing. But I am curious of how much space I need to leave between the round bushing and the parts that ...
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1answer
20 views

CNC round-over bits with thin shank

I want to use a round-over bit on a CNC router after cutting a profile with a 3mm (1/8") bit. So the round-over bit needs a shank thinner than that. I could only find shanks with 6mm (1/4") diameter. ...
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1answer
83 views

Scalable alternatives to CNC router and laser cutter

I am doing calculations on costs for alternatives for manufacturing this children's toy I invented, a puzzle where letters in plastic fit into wood: I have been using a CNC router to carve subtract ...
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1answer
47 views

Mechanical tolerances on a CNC machine

I have a project which involving several mating parts and also shaft guided through bearings, my issue here is that I don't have much experience with tolerances and manufacturing processes and I ...
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13 views

How can one count the flutes on an end mill with diamond pattern?

This carbon fiber-cutting end mill tool has two intersecting spiral patterns going opposite directions. How can one determine the flute count for calculating feed rate?
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19 views

Best way to resume aborted cnc job without endstops by zeroing in on known hole…?

I have a very simple little T8 CNC without endstops that I use for PCB's. After a failed drill job, the position of the machine is lost and I would like to resume the job. The machine is running GRBL ...
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1answer
48 views

System for aligning/truing objects to each other in a plane for CNC machine

I apologize for the vague title. I know my problem, but I am having problems describing it in concise words, which is making it difficult for me to google. I am building a CNC machine that is similar ...
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1answer
40 views

Tapping small hole on titanium

So I want to tap a super small hole on grade 5 titanium alloy with M1.8x0.2 (which should be possible according to this Quora's answer. But is there any tap available for me to do this job? I mean M1....
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26 views

cnc z axis motor huming when homing

I am using GRBL and UGS with an arduino uno and its CNC shield. Once I send the $H command, the z motor is moving a little bit and then it goes crazy. I mean it's starts to hum and doesn't move ...
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1answer
45 views

What is relief amount in grooving operation

Can somebody please explain what relief amount at the end of cut in a grooving operation on lathe is?
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1answer
37 views

Weird texture on faces when using Shapeoko CNC

when I run an operation that mills a face down on my CNC, it leaves this weird texture. It's hard to describe, so I attached an image. What is it caused by and how do I fix it?
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1answer
231 views

End mill vs Drill Bit Flute Geometry

What is the fundamental difference between the flute geometry of an end mill as opposed to a drill bit? Obviously drill bits are not intended to cut horizontally so what difference about them makes ...
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0answers
28 views

How can I get the spindle driver current internally?

I am working on monitoring research. During it I found a lot of papers use Hall effect sensors to get spindle current. However some of them are accessed internally to spindle driver current. I will be ...
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1answer
88 views

How Can I do punching of 0.22mm in stainless steel sheet (Sheet thickness 0.5mm)

Wanted to press punching of 0.22mm dia (Bottom) and on (top) 0.6mm dia Please suggest how can I make such die?
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2answers
476 views

Looking for program and file format for CNC Milling

I am creating subwoofer boxes out of MDF or Baltic Birch. My local makerspace has a CNC machine. I am going to make all of the cuts with it. What software is generally used or will work to get a ...
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1answer
419 views

Disadvantages of wire cut cnc edm

Before purchasing Wire cut cnc edm I just wants to know about disadvantages of it over using mechanical lathe machine.
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26 views

How do I configure g-simple so it does not use G81 code?

I have a CNC that does not understand the G81 code for drilling. G-Simple looks to be configurable but I am finding it difficult to find information on it. It looks to have a "USE" command with a "G81"...
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1answer
91 views

Milling aramid composites produces unwanted fuzz at surface

I use standard end mills for cutting carbon fibre sheets. Generally the cutters are 2 to 3 mm diameter, with a flute length of about 8 mm. I use 3- and 4-flute end mills. These work quite well if they ...
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1answer
336 views

CNC engraving single line fonts [closed]

I want to engrave some letters from a 2D dxf file with single stroke fonts. Is this easy to do in most CAM software? I have not decided what CAM software to use yet, because the ability to do single ...
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2answers
203 views

Design for CNC -cut sheet+bolt connection

I'm making a corner shelf for spare toilet paper from a thin plywood sheet, say 5mm. I want to connect the plywood to the corner walls with a bolt/nut joint like this: My question is -- how do I ...
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3answers
163 views

CNC milling of large cutouts

I have a part made from 5mm alloy plate and I need to cut a large cutout in the middle of said part: As seen above I intend to use a small cutter to cut through the stock (not necessarily plunging as ...
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2answers
64 views

What resolution (pixels/mm) should I use in SVGs for CNC

I am planning a mechanical 40% keyboard build and are coincidentally on the home stretch of a homemade CNC project. The only thing the CNC needs to do for the keyboard project is to drill 7*48 holes. ...
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0answers
101 views

Standard parameters for machining aluminium?

Sorry for the weird question but I was wondering about the standard machining parameters for Aluminium (if there is even a standard). Particularly the values for a CNC process (preferably in SI) for a ...
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0answers
195 views

How to cut evenly spaced uniform holes in a plate of metal?

I've looked everywhere for this seemingly simple question, but I cannot for the life of me find out how to easily cut a specific amount of holes in a plate of metal with my cnc. Am I going to have to ...
2
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1answer
229 views

Is conversion from EMC (*.ngc) to heidenhain (*.h) CNC code possible?

I have some gcode created with dmap2gcode. This and Meshcam are the only software I could find that could would take a large image and create the necessary gcode. Now I would like to try cutting ...
2
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1answer
132 views

Lightweight substitutes for machined aluminum parts

I have machined parts that are made of aluminum and anodized black. The reason that I chose aluminum is because: It can easily be machined and is low cost and is common, so easy to buy It is light ...
4
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1answer
67 views

Accounting for blank registration within CAD design

How do CAD designers account for the fact that a blank may have to be flipped to a different side in order to allow the piece to be completely milled through a CNC system? For an example, let's use ...
4
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1answer
234 views

High spindle speed, low tool pressure

I'm building a small hobby CNC machine out of aluminium with the end goal of milling plastic, aluminium and possibly some harder stuff like steel (although if you saw the machine you'd laugh me out of ...
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2answers
9k views

How do I manufacture a fillet?

What are the most popular and the most efficient ways to machine a fillet on an external edge of an object? If I were to use a CNC mill, what tools can I use for it, and how would the method change ...