Help me choose my first spindle

[Ger21]

option 3. Via Mach3 which talks to the VFD through an interface board. This can be added later so again don't need to worry about it in terms of spindle selection. My understanding here is that this can be PWM signal or a 0-10V signal.

Mach3 or LinuxCNC outputs a PWM signal, which is then converted to 0-10V which is fed to the VFD. You need a spindle controller or breakout board that does this. You can also get controllers that convert step/dir to 0-10V. Someone at CNC Zone just used a step/dir signal to a Hitachi VFD to control it directly.
You can also use Modbus to control the VFD.
Lots of different options.

[Boyan Silyavski]

2.2kw is the standard for a nice machine. And no need to upgrade as they are quite reliable. If you buy from reputable seller and receive GPZ brand spindle, yes, they are 4 bearing. spindle is best controlled from board. The more "auto" the better in the long run.

Why dont you take a step back and explain your axis decisions? if you have not bought the screws and supported rails.

First of all Hiwin 20 is enough and best for the purpose. Secondly the Z and the X/ gantry are quite more important than the long axis /Y and A/ . So if not gonna be used square rail on all machine, then better be used on Z and X.
Also 20xx screw for Z is overkill, 1605 is best there and 1610 for the X.

There are many threads in the forum where all is explained again and again..., so may be some homework?

[Desertboy]

Hi Boyan,
I've read a lot of your posts and seen some of your builds and so I know I would be wise to listen to your advice.

I try not buy things if possible lol the z axis will be made with this
(Once I have it rebuilt) I have 25mm smooth rod with bearings as well.

which cost me 1 days very hard work stripping it out a machine (I got 3 of them) but no actual money just hard work ;)

I'm using 25mm supported rail on 1 axis because I got it for free and 15mm hi win on the other axis because 1.5m with 4 blocks on 2 rails was £99 delivered.

This is a cheap hack machine lol but I do intend to pimp it up or just build another one I have more t slot and sometimes I get get rails to scrap ;) so we will see.

[Boyan Silyavski]

Free stuff is the best stuff

[Desertboy]

Free stuff is the best stuff

Too true

https://www.aliexpress.com/item/Hig-...796651547.html
looking at this on alixpress when I build another one (I want 8*4 capability) I think I should just use these all round at this sort of price unless I'm particularly lucky with the next machine that comes in.

I was thinking the best thing to do with the supported rail is to use it until it becomes an issue then keep the rail and bearings for a table saw slide to make cutting 8*4 a joy.

Although I want at least one axis to have 3m rails.

So going to cost a £1000 by the time the import tax man has his fingers in the tills lol.1

[Boyan Silyavski]

Too true

https://www.aliexpress.com/item/Hig-...796651547.html
looking at this on alixpress when I build another one (I want 8*4 capability) I think I should just use these all round at this sort of price unless I'm particularly lucky with the next machine that comes in.

I was thinking the best thing to do with the supported rail is to use it until it becomes an issue then keep the rail and bearings for a table saw slide to make cutting 8*4 a joy.

Although I want at least one axis to have 3m rails.

So going to cost a £1000 by the time the import tax man has his fingers in the tills lol.1

Exactly these ones i had problem with. I had just one sample though. Check Robodig ones, they seem better to me

[Karl]

So I wish to upgrade from my Kress motor and I'm wondering if the spindle that started this thread is the way to go?

Advice please.

Karl

[Clive S]

So I wish to upgrade from my Kress motor and I'm wondering if the spindle that started this thread is the way to go?

Advice please.

Karl

That's the one if your machine can carry it. https://www.ebay.co.uk/itm/2-2KW-WAT...c=1&rmvSB=true

[Karl]

OK, rightly or wrongly I've just ordered one of these spindles from Germany.

So now I need to:

• Source a bracket - recommendations please -?
• Learn how to configure and operate the spindle - I'm sure there's an article or 2 on this site somewhere - ?
• Absorb recommendations etc from folks who have such a device - ?

Hoping folks can point me in the right direction.

Karl