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I think this is the manual you were looking for. I found it on the Australian Vevor website. https://d2v0huudrf11kh.cloudfront.net/vevor-center-goods/VariableFrequencyDriveManual_1654738270427.pdf I...

I decided to buy the updated version of the same controller (QS7-AA015m)

A bit of reading on the internet has led me to suspect that it is ok to reuse existing AC servo motors with different servo controllers as long as the controller can deal with the pulses per rev put...

I will have a 3.5kw servo that I ordered for the mill by next week. I will give that a try on the lathe first and if o.k. I will order another the same.

Backlash control isn't so important on the spindle when you just use the lathe for turning and threading etc. It becomes an issue when you think of the other possible things you could do with it. 😕....

I have a CQ6230 lathe that I converted to CNC about 10 years ago. The lathe works well, but I recently had an issue with the spindle VFD and since I had an extra servo motor and drive laying around,...

It look as though my pictures didn't work
Also my other lathe has a bigger through spindle so this is not an issue in this case. Well observed though.

Here are some pics of the servo and controller that I plan to use on the spindle.

Thanks for your thoughts Pippin
I don't think it is a great option for a conversion either, but since I have it now, I will go ahead and convert it.
My goal, as I said earlier is to do it in such a...

Hello all

It's been quite a number of years since I have posted a machine build, but I'm at it again (finally).

I recently acquired a Myford super 7 lathe from a deceased estate and have...

The machines were Chinese. I have sold mine now and purchased a much better one (a Kingrich) I am in the process of fitting servos.:wave:

Must have been a lot of work done on the lathe! No, I don't have a thread for the toolpost, its a bit late now that its finished:) The lathe refit is an option, but I never finished the thread on...

Hi Chic,
That certainly is a big beastie for a home workshop, you get a better idea of its size now that it is all nicely mounted. Its certainly not going anywhere!
I see a bit of swarf in one of...

Thanks for the suggestions, the tool is dead centre and is exactly at centre height and all of the ways except the cross slide are locked. I think it must be surface speed. I have a 3 phase motor and...

Thanks a million Geoff,
Will give them a bell in the morn

Cheers
Dave

Hi, I've just made a parting tool holder for my quick change tool post from some plans I bought on the net, the blade for it is available from McMaster Carr in the states, but I cant seem to find...

Thanks Trev, I'll give your suggestions a try. I am using flood coolant and the lathe is flat out speed wise, so I'll give the HSS toolbit a run.
Thanks again.
Dave

Hi I have an Emco style Chinese bench lathe, that I am about to convert to CNC.
I thought that before I started the conversion I would get the machine set up as nicely as possible, so I have made a...

Looks really good now Chic, how far are we from ignition?

Thanks Jim,
I found some in the interim at interalloy in Melbourne.

Hi all,
I need some 4140 pre hardened steel for a toolpost that I am making, I only need a small quantity, ideally square bar, but round would be ok.
Could anyone help me with a supplier please
...

No, I'm not familiar with the smaller 20pin? plug. Let me know how you go when you hook up your laptop to the serial port, did I mention that you will need to use a terminal emulator, such as...

Hi Chic,
That looks like a db25 serial port. Have you tried connecting a null modem cable from that to a pc to see what happens? Experiment with various comms parameters, but it's probably 9600, 8,...

Thanks Chich, the display arm is next, but didn't present much of a problem. The interesting bit is the quill, there was a weeks work in that!
...

I hope someone is reading this thread! please feel free to make any comments, critical or positive, but best of all would be to make some constructive ones like Chich's posts ;)

anyway on with...

With the X axis operational, it is time to go to work on the Y axis This is a little more difficult than the X axis, since there is not a nice machined surface to mount the scale on. It is...

Thanks for the feedback Chich, I did think of that, but discovered that the concertina swarth cover over the y axis bed at the back of the table doesn't allow the scale to hit the column. Good...

The first thing I did was unpack the boxes and lay the contents out on the workbench.

http://i452.photobucket.com/albums/qq250/dmbgo/DRO%20installation/th_IMG_0277.jpg...

It depends what you call good, It came with instructions, and I guess if you are the sort of person that feels capable of accurately installing a DRO and scales, and have had some experience of mills...

Sounds just like my mill, once I noticed the slop on the dial indicator I grabbed the table and heaved it back and forth, I could hear the oil squelching in the ways and see the movement! hard to be...