CNC Information | CNC Videos

gerch77 asked:


How would i go about hollowing out my cat and puting a straight pipe through it? what is the best way that wont involve a plasma cutter

CNC Basics

Antony G asked:


I need to find a way of cutting a sheet of MDF which the dimensions 2500mm x 1250mm x 30mm, into strips 12mm wide.

The cut surfaces must be totally free from tool marks and the strips of MDF must be cut completely straight with 90 degree edges. I’ve obviously considered using a cicular saw but that would leave some saw marks on the material (importantly, it would not be possible to sand the MDF after cutting).

Is it possible to do this with a cnc router/engraving machine? Obviously I would lose a fair amount of material due to the cutting width of the router bit, but as the MDF is quite cheap I don’t mind this.

CNC Videos

Antony G asked:


I have a sheet of MDF (2500 x 1250 x 30mm) and I want to find out if it is possible to cut 3mm (or the width of the minimum size router bit possible) square grooves/slits across the MDF exactly 12mm apart. These grooves/slits would run the length of the MDF from top to bottom, but importantly would not run right to the edges of the sheet.

Basically this would mean I would end up with a large thick piece of MDF with very long slits (aproximately 1200mm long and 12mm apart) running right across the material.

I have spoken to a number of people who have suggested this is not possible because cutting the grooves/slits that close together would move the material or at least make it unstable to the point where the grooves/slits would not be straight.

Is this really correct? I find this very strange as I would have though that doing something like this would be incredible easy for a CNC router.
Also, would CNC router be able to cut the grooves/slits in one pass or would the machine likely cut the top section first and then lower the router bit to cut the bottom section of the grooves/slits?
The reason I want to use a CNC router is because I need the cuts absolutely straight and with hardly if any tool marks on the cut surfaces.

Importantly, the grooves/slits would be cut completely through the material so that you would be able to see through the MDF e.g like a big set of prison bars sort of thing.

CNC Forum

tony g asked:


not moving at all

gcode

Lt. Dan asked:


My art teacher was giving us a lecture on plasma cutting and he said the pilot is hotter than the sun’s surface. Is this true?

CNC eBook

Joana R asked:


I have a few questions about plasma cutting.
1) What could i use to make a stright line with a plasma cutter. maybe a piece of wood
2)What would be a good thing to mark sheet metal with. maybe a sharpie
3)What would be a good way to make a pic bigger without a projector.
4)Any more tricks or anything else you could tell me to help me.
Thanks frist one with best answers will get best answers

gcode

Antony G asked:


In the near future I am going to be starting up a business making furniture, and I will be using Sage accounting software. I know how to set up the depreciation on all my fixed assets but where exactly do I get the depreciation rates from. Obviously you can’t just take a guess at what the rates should be e.g I have purchased a CNC router machine which cost £14000. Do I depreciate this item 5% a year or 20% or 15%. Where can I get this info?

CNC Jobs

regnosr asked:


Can anyone draw up a picture for me on AutoCAD so I can cut it out on a piece of steel with a plasma cutter? Can you do this for me?

CNC Router