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.

21 questions with no upvoted or accepted answers
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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 ...
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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 ...
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52 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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144 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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105 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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50 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 ...
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31 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 ...
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23 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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31 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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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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229 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 ...
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1answer
148 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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13 views

Mill spherical recess using Fusion 360

I am trying to mill a spherical recess into stock on a 3-axis mill. I am generating the G-code in Fusion 360. I need some guidance on the best tool path generation option in Fusion 360 as every ...
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53 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 ...
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14 views

Grinding Forces Problem - CNC on Zerodus

We, my colleague and me have follownig problem and now weIwanted to ask if you can provide us any help. It's the first time we are posting in this forum, so we are thankful for any ideas or input ...
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33 views

Mdf cutting seems to require absurdly low spindle speed for the right chip load

I've been trying to calculate the correct spindle speed and feed rate for my setup and it took me to some absurd settings. Can you do the math and check the sources hand in hand with me, plase? My ...
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30 views

Getting From 3D a model to CNC router

Apologies if this is not the correct SE for this sort of question. But, this is the only place I've seen an appreciable number of CAD questions. If this isn't appropriate for engineering.se, a pointer ...
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34 views

Permission Denied copying to (User Data) dir -Haas Next Gen Control

We recently purchased a new Lathe - Haas with Netshare, Next Gen Control. We are copying a file to the Haas Drive's (User Data) folder from a network PC. The problem we're seeing is random and ...
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26 views

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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78 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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1answer
36 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 ...