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Hi,
Long time no post I know but I just thought I'd give an update on the lathe. I'm very happy with it, I've really only had one issue with it which was a parameter setting which stopped the x and...

Thanks for the update, much appreciated.
John

Thanks Chich !

I can see in the video manager that the raw file is an mp4 ? I'll see if he can get me a HTML5 version

Hi Roger, how can I see on youtube that it's flash, my son is looking at me like I'm an old person...

Hi Roger, my son did the video and upload to youtube, he's telling me it's not flash. Maybe the way I linked to it? Try taking inverted comma's off this link and paste it in to your browser....

I finally got some time to fully set up the first job on this lathe, using onecnc xr6 lathe express to do the cad and cam, with a bit of manual tweaking. I had quite a few issues to overcome, but...

Option 6 Get a proper cnc controller, drives and servo motors from the one manufacturer. I have a lathe equipped with a GSK controller, servo motors etc. The spindle motor on it is 5.5kW induction...

Hi Defeng,

Thank you for responding, I do appreciate it. I did get your email and responded to it, but it must not have got through.

I think you are correct with the possible cause of the...

Picture of new wiring layout at the axis drives320760

I've managed to get the noise on the spindle drive signal down a long way. I noticed that two of the three axis drives were causing the noise, the middle and the top one. The way the wiring was tied...

Hi Daniellyall,

Has the grounding been done properly? I'm not sure yet. The AC circuit ground, definitely yes, it is built safely. What I see is a lot of separate dc supplies in there, There are...

Hi Ian,

Well, after quite a few failed attempts to get a response from Defeng on this issue, or any communication at all, including a sales enquiry, I came to the conclusion that there is no...

I've done a bit more work trying to find where the noise on the spindle voltage signal is coming from.

First, I've disconnected the power connection to the spindle drive, the noise was still...

Hi hab82, I'm very interested in what you are doing here, thanks for keeping us updated.

regards,

John

Hi,
victorofa, what you say about this not being cost effective is correct, many hours. But I'm not doing this for the money, it's a hobby, and myself and my Son are learning a lot.

I did...

The breakout board does not alter the rpm voltage, it passes straight through. Where the rpm adjustment pot would have gone it is bridged out on the board.

So, what I'm seeing here is that above 1000 rpm, the drive is setting a higher rpm than the voltage applied. From mach3 the applied voltage to the drive is consistently lower the it should be. Below...

Hi,
I've done a couple of tests on the drive circuit to try and figure out where the problem might be. I've calculated the required voltages that need to be applied across a range of spindle rpm,...

Hi Rusty,

My machine is green under the orange as well, but I don't think that it is a problem, I've always known I was getting one of them.. I believe there were five or six machines partially...

Their prices are reasonable for the quality of the cutters, You can always find cheaper ones though, it depends what you are after.

I've bought quite a bit of stuff from Livetools - Machine Tool People | Machine Tool People, they have very good tooling, and are very helpful.

regards,

John

Hi Russell,
That's a nice machine you have there. I learned cnc machining on one at Tafe many years ago, it was near new when I was using it. We only machined aluminium on it but some of the...

Thanks mcphil, very handy info.

hab82, I see your questions have already been answered. I'd just like to add that I think the problems I have with mine may not be a good indication of what these...

Hi Gerry, thanks for that. I've been trying to get that bit working correctly as well, but that was not what I was referring to here. What I meant was that the drive itself is operating in steps, it...

I've found that the ground wire from the motion board under the breakout board, to the breakout board is not earthed. I'm not absolutely sure that it should be, but all three wires that are connected...

Will do, thanks mcphill,

Your posting of Defeng's instructions in the magnetic drawbar thread :rolleyes: was very helpfull, can we put it in this thread as well, it might be bit easier to find...

Hi, I've started a new thread about the spindle adventure here http://www.cnczone.com/forums/vertical-mill-lathe-project-log/303976-observations-skyfire-svm2-spindle-drive.html?posted=1#post1862340,...

One thing we did notice, is that using the power supply we had very fine control over the voltage going into the drive. We noticed that the output of the drive goes up or down in steps, we didn't...

You can see the level of noise on the 0-10 volt input into the drive is quite high compared to the 1 volt base level at around 500 rpm. So, to see if that was having any effect on the drive and...