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Yes your spot on with differences between these boards. The UC300 is the better option if you need lots of I/O. Coupled with a Good Bob that can accept 24v signals it's an excellent setup.

The...

Hi chrono,

Wouldn't go with ESS as the backup is rubbish and your limited to mach3/4. The uc330eth or 400 are both much better options.

I've not read all your thread but i saw you where...

Have you seen Joe Harris build log here is a link to his youtube channel on power supplies https://www.youtube.com/watch?v=4OoQQg76ar4&list=PL1FIADAKba_tiLqXbUkzD30sZjtp_VyqY&index=2&t=0s

There's a nice guide to designing linear power suplies here http://www.skillbank.co.uk/psu/

Whilst it's true a linear supply of a given rating can deliver significantly higher current peaks than a...

My build thread, post number 30 has an outline of the process I followed, but I emplore you to find multiple independent sources of information and fully understand and verify before playing with a...

You're planning to beef up the side rails, add the bed whilst you're at it.

Much advice has already been given to you and there is sooo much more on this site from some VERY talented,...

Chrono, apologies for missing the second ballscrew, that makes a big difference. You at least have a brick under the end of the springbard:thumsup:

Most builders here use rails both ends of the...

Hi Chrono



When I first saw this design, I couldn't help but think that was far, far too flimsy

Now with your explanation of the gantry driven from one side only (above)......it's getting...

Hi Chrono

No broken etiquette as far as I know. You're probably doing a great job and nobody has much more to add ;)

A few comments I would have from your last set of design drawings are:
-...

You could also think of using rotating ball nuts :calm: 2Mtr is a long way with 16mm screws

Will reply with a more detailed look at your spreadsheets when I get time, but to quickly answer a couple of points:



As you're in the EU, pretty much any EU store is an option. CNC4YOU.co.uk...

Suggest you start here:

http://www.mycncuk.com/threads/1524-What-size-stepper-motor-do-I-need

Once you're up to speed with the description, open the spreadsheet and customise to your needs (its...

Cool, changes look to be in the right direction. Z axis will be much more stable - even more so if you can space those bearings apart a bit.



Woowwww there cowboy! Hold up a second! A Nema 34...

As in, hanging the motor off the back of the carriage, the opposite side to the spindle? Don't think it'll be a problem in terms of torque on the gantry (else you're not going to be cutting much!),...

There is a reason I picked which questions to answer and which to avoid!

Washout makes a good point about the adjustment of things. I like your ballscrew placement idea on the gantry, but it...

Hi Chrono

Andy beat me to many bits of good advice, but I'll add:

Whilst some of the details are missing the green plate method, provided the plates are thick enough should be a good approach,...

Others will be able to say, but should be able to take light cuts in Ali. Steel is probably out of the question - for that you're better off converting an existing mill.



Can't see it in the...

To make things more clear, with your 6 wire motors and bipolar drivers you have only two possibilities. Bipolar series or half-coil.

With bipolar series you get better torque at very low speeds....

Hello Gustavo! Welcome to the forum!

There are three types of connection for a stepper motor, unipolar, bipolar series and bipolar parallel. Nowadays most are wired bipolar parallel because they...

Let me expand this a little for you with rough some numbers. Many of these options you won't require but will be found on many CNC routers.
You'll also be surprised as you go along how many things...