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Personally I use 20mm mostly but 15mm would work for a lighter Z-axis. Just remember the Z-axis is handling all the cutting forces so if it vibrates then the tool vibrates with it and you get a...

Its a combination of both. Lets start a pros/cons list! Hopefully everyone can add/remove. I don't think you can make a general statement about what sizes of machine would be more or less likely to...

Ooops. :)

Force of habit I'm afraid... work requires kV / MV... You know what I meant!!

I'm with you Doddy! There's a definite new social possibility in this thread... "come round for a free beer and have a look at my home-made CNC machine". I might be abe to make some friends!

It is...

That would be some big machine :whistle:

As the others say don't get stressed over it and just build to give the required amps plus a few spare. Work on 60% of the total Motors rated amps and it will be fine.

Don't go crazy OTT with the...

It's easy to get too wound up about these things. Whether you should use 60%, 70%, or 80% really doesn't make a bit of difference - if you are using a linear (i.e. toroidal transformer, etc) anyway,...

Wow that's some serious brewing activity...

Don't worry about phases in your calculation. Just take that single phase value, 4A or so and go with it.

If your Calcs end up needing more than...

Hey Joe,

Please don't worry about that. You are free to continue asking any questions you want in my build log. JAZZ was only being polite, since I have not mentioned anything about it. But now I...

Hi Joe,
Thanks for asking many of the questions I need answers to as well!. I am currently trying to start my own design from the Z axis out. You would think this would be the simplest axis with...

Just get a few different lengths and lay them on top of each other, aligning with each bolt hole to keep the spacing. It's always better to work accurately and mate the bearings to the surfaces of...

Yes they can do slightly. The internal will be all the same as it's a standard but the externals can vary in size but in my experience they are very close in size.

I use Siemens NX which I am lucky enough to have a work related license for. If I wouldn't have that I would probably be using Fusion 360.

The linear rails and blocks are downloaded as STEP files...

I don't use F360 but would imagine it works just like Solid works where it will allow you to import Step or Stl models which if Hi-win don't supply a direct F360 format like they do for SW you could...

Ok well first HGR is the rail. HGH15CA or 20CA are the Slim carriges.
When to use the W or wide carriage depends on the design. Personally I always use the W on the X & Y axis when ever possible and...

Yes BK12 = 16mm BK15=20mm

Regards the FF then they are a different fitment where they don't actually use a block that you bolt down. Instead, they bolt directly to something which is usually...

I think some people use Motedis for Profiles. StepperOnline / CNC4YOU / Zapp for the steppers & drivers.

A little knowledge is a dangerous thing. Sometimes you really do need to make the effort to understand the subject correctly. Read the information in the first page or two of the link I gave in post...

Wise choice and over time you'll see why it's best to ask questions all in one place that relate to the machine your building.




With 2K you can just about do it but you will have to be very...

Aww thanks. Definitely read through Joe Harris' build log. I based mine on his machine. His is better! More detailed log with videos on youtube and everything.



Don't forget to factor in...

No don't stop asking questions. Start a Build thread and ask all your questions in there. Don't worry about asking what may feel like dumb questions or offering up weird and wonderful suggestions....

First let me say I'm not having a go at you or anyone with this post, it's just to make my point.!

Posts like these are what confuse folks and lead them to add up the wrong numbers. The Va rating...

That's the $64000 question isn't it.

I built a 70v PSU which means if I change my drivers they would have to be in that range or I need a new transformer.

I think mine is 1kva so I think I...

This here is exactly why you shouldn't buy anything until you fully understand what's been said and why.!

My suggestion to that person to use a toroidal over a the 6A PSU would have been based on...

Every answer raises two new questions. You'll have to get used to it I'm afraid!

There are plenty of sources of transformers. Have a look at RS Components for example. Even if you don't buy from...