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OK, so I need to bore this hole out to just over 80 mm to give a nice sliding fit on the WC spindle:
22292

To give you an idea what is required here is the finished fly-boring cutter mounted on...

These are supposed to be very good for the money.
https://www.amazon.co.uk/QIDI-TECHNOLOGY-Extruder-Desktop-Structure/dp/B01CU2MCM4/ref=sr_1_10?ie=UTF8&qid=1500813141&sr=8-10&keywords=3d+printer
...

I can see you are going where I didn't want to go :distress:

Routers don't make good printers, they really have opposite requirements in most respects.

Printers ideally need to be fast and light in the moving parts. It is of course possible to put a print...

A few months ago I said that I would have a look at the output of my power supply with an oscilloscope to get a feel for what was happening to the supply voltage with the router in operation. I was...

Managed to cut another one out this morning:
21070

Another trial fit showing both triangular supports:
21071

Just 2 more to go for the other side.

Here is the current design for the Y/Z...

With the 7i76 and 7i76E there are about 34 input and outputs with 5 axis two mpg's and spindle control encoder for threading A & B + index.
So I have both lathe and mill wired to the card and use...

If you want a system that's more plug and play, then you have to pay for it. And even at that, there will still be a certain amount of work you'll need to do yourself.

Personally, I'd go for...

As m_c points out, you do have to consider the between-phase/phase-to-neutral voltages. That might be what is implied by the 3-phase transformer. I use the common Huanyang inverter for my router...

It depends on the VFD. Some have input voltage monitoring, some need derated, some can be fooled by connected live to two inputs and neutral to the other.
Just in case you're not aware, one thing...

No I don't use PathPilot but do use the spindle encoder for the lathe and that is very easy to setup I have also setup jog wheels for X and Z on the lathe.

There is a tutorial on the other...

Without getting a load of flack. Linuxcnc with a mesa card is what I use on the lathe with a 60 slot encoder disc on the spindle.

Unless you're going to replace the v-belts with a toothed belt, a closed loop motor isn't going to be much benefit, as the belt will cause slight speed fluctuations as load changes.

You also need...

Hi Ross,
Long time no hear! Have a look at these -

Setting up Mach3 for lathes:
https://www.youtube.com/watch?v=ZSbljHlBgaY

Fitting an index ring to give pulses to Mach:...

Not forgetting that real machinists use steel...not ali! There's no such thing as over built and when I build somthing, I always over build, with in reason of course. Code may say 4x2 but there's no...

You've used this term, DIY, many times before, and what you say about it here is true, but maybe some people are trying to build a 'professional' machine ?

Whether the motor can be altered to run on 240V depends on if it's wired as Star or Delta 440V.

It's a case of carefully dismantling the motor, and seeing where and how the coils are connected. If...

Here's a spreadsheet to help when working out timing belt lengths. There are plenty of these calculators online, but I made this as I find it makes it easier to compare options when you can list...

As mentioned above, here is a picture of the operation.

This can be used to centralise any pop mark in the four jaw.

Using two centres, one in the tailstock, and one between the tailstock...

Pretty much. You need to ensure the DTI is dead on centre then compare opposite faces by rocking the chuck for a minimum reading

It is easier and more accurate if you trap another lathe centre...

Dick has actually had a couple come loose but I feel that it's more they way he did it.

Ok I'll share my secret machining technique here, anyone of a gentle disposition needs to shut their eyes at...

Power(kW) = KQ/1000, where K = cutting power per cc (17 for ali), Q = volume removal rate....assume 70% efficiency in spindle, 0.7 * 0.6 * 1000 = 17 x Q => Q= 24cc/min, add safety factor of 50% then...

I'm sorry I haven't been available recently, health and bereavement issues reared their ugly heads.

I have done the spindle removal many times, and there is a definite knack to it.

It is very...

If you look at how the lathe is built up, you should find that most of what you are worried about is mounted onto the detachable head not the main bed girder.

The girder will have to have a few...

As you know, the Atlas system is based on a single heavily webbed and rigid girder that everything is bolted on to. I would think anything which compromised that would render it useless, and...