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Antony G asked:


I need to cut some shapes out of 0.8mm thickness stainless steel using a CNC router and I basically need to know if it is possible. Importantly, the cutting tip size must be no larger than 1.5mm. It would be OK to cut through the stainless steel on more than one pass. I’m just thinking that the cuttting blade would go blunt almost immediately. Would a diamond tipped cutter blade do the trick. If it is possible what would be the best cutter blade to use?

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Antony G asked:


I’m looking to use a CNC router table to flycut the top surface of some wood. Importantly, I need the surface to end up quite rough e.g the type of rough cut surface you would get from cutting some wood using a circular saw (but without any machining marks). Which router blade should I use to achieve this? Or is it more a case of reducing the router cutting speed. Whenever I have used a router to cut wood, the cut surfaces have been left quite smooth.
The cut top surface of the wood needs to have no machining marks. This is the main reason why I’m considering using a router. When I have cut wood using a circular saw, I really like the slightly rough texture and look but unfortunately you also get faint machining marks which I don’t want.

I have tried planing but it leaves the wood too smooth.

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Chris Fulton asked:


I have a newly built CNC router. Its built off of the HobbyCNC plans. It has a HobbyCNC controler (3 axis) with 305oz motors. The ‘router’ is a trim router that takes 1/4″ bits.

I’m looking for help with some guidelines regarding selecing the right bit, plunge rate and feed speed. I’m cutting some 1/2″ maple, but also want to cut and engrave acrylic.

Is there someplace that gives this type of info?

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Antony G asked:


I’m going to be using a CNC router to flycut some MDF and I want to create a slightly rough surface. One machine I am considering buying has a spindle rotation speed range of 6,000 to 24,000 RPM. Does anyone know if it is somehow possible to set the machine to cut at a slower rate?
Do-n-it-4U. Re your answer. If I use a dimmer control, will it reduce the router travel speed as well? As I see it, for me to create a rough surface I either have to increase the travel engraving speed or reduce the spindle speed rate. Obvioulsy being able to do both would be ideal. However, if by slowing down the spindle rotation rate by using the dimmer, you also slow down the travel speed then I would imagine it would pretty much cancel the overall benefit.

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nick j asked:


HHO generator cell plates and will be in highly corrosive environment.. Band saw is not working well for large production. Any other suggestions will be greatly appreciated! Thanks!

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honker asked:


I’m in the market to purchase a Plasma Cutter.
Any suggestions where to see any tradeoff websites. What makes a good choice for purchasing the right make & Model.

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mevin217 asked:


i am looking to buy a plasma cutter for around $700. what is the best one for that price range?

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Antony G asked:


I own a CNC router and I have been cutting some MDF into strips. I’m currently using a slitting saw blade which is OK but ideally I would want to use a standard circular saw blade because it will cut through the MDF easier.

The trouble is all these circular saw blades are normally advertised for use with either a table saw or a hand-held circular saw. Are these saw blades OK to use with a CNC router?

Basically, what I have done is to bolt the spindle on my CNC router sideways and attached the saw blade using an arbor. Using a slitting saw works fine but I really want to use a circular saw blade instead.

I can’t see any reason why there should be a problem but for safety reasons I just thought i’d better check.

CNC Basics

Antony G asked:


I considering buying a CNC router table (max material cutting size is 1200mm x 800mm x 90mm). The website indicates the blade holder specfications are 3.175mm, 4mm & 6mm. Does this mean that the minimum router bit size I can use with this machine is 3.175mm? Basically, I want to cut narrow straight slots in a sheet of MDF and I need them to be as narrow as possible. Does this mean that this machine cannot cut slots more narrow than 3.175mm?

Finally, the sheet of MDF would be 30mm thickness. If the machine was to router/engrave completely through the sheet e.g to a depth of 30mm, would the cut be straight and clean with no tool marks on the cut sides of the MDF? Would a router bit with a thickness of 3.175 struggle to do this?

CNC Router

funracingdad asked:


I have a large tank. It is heavy plate tank from an 80 gallon air compressor. I’m wanting to convert it into a large upright gas smoker. I am wanting to set it up so I can install wire grates every three inches for items such as pork chops and ribs then remove grates for larger items. I need to know of a supplier that sells round grill grates by diameter. Replacement Weber grill grates is all I’ve found so far doing google searches. I’m looking for a company that sells a selection of sizes. I’ve just purchased the tank and havn’t touched it with the plasma cutter yet to know the inside diameter of the tank.
Thanks for your help!

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