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Lagun Ftv-1

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bjornsh67

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May 19, 2013
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#31
Hi Ski,

You have done a great job with your Lagun! I have a similar machine - a Lagun FTV-1 with varidrive and feeder on X axis. I have made two simple videos of my varidrive. One is with low gear and one with high gear.

I notice some slight vibration in the head but have no indication that the main spindle is bad. I measure roughly 5 micrometer runout and from what I can judge they seem to be fine. I could use the stethoscope screwdriver method to investigate further - an interesting simple excersie.

The belt is slightly worn and it could be that I need to change them due to their age and stiffness.

If you have time, could you have a quick look at those videos and give me a comment based on your experience with the Lagun head?

Thanks,

http://www.jottacloud.com/p/bjornjotta/79245d960be24ae18a49e5bf573f5d8b

http://www.jottacloud.com/p/bjornjotta/b4adb54377c44ec690d55285e6fc6038
 

Ski

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Sep 23, 2010
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#32
Hello ,I apologize for such a late response.Had a PC failure and have not checked in. Then I think I missed your post as well.That said,I listened to both and your machine sounds similar to mine. I would run the machine until it is warm and let the belt work. They may take a set after sitting unused but I think use brings them back. Run it through the speed range. If you can see a lot of worn belt dust and material in the housing ,I'd consider changing it then. I also have a slight vibration in this machine but considering belt drive,my guess it is normal. This is a new belt and new bearings. It has not seemed to cause any problem here but I have not done any serious work on it yet. Small projects here and there but par for the course since I am just a hobbyist. Where are you measuring run out? In the head? Or is this in the spindle measured at the r8 bore? Ski
 

bjornsh67

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May 19, 2013
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#33
Hi Ski,

Thanks for the reply. I have all the original manuals that came along with the machine. In the instructions, it is recommended to run the variator from minimum speed to maximum speed as a daily mainenance.

The head has a slight vibration but it is not making any noise (other than the regular noise from a cold belt in the variator). It is some dust inside the variator but the belt appears to be in okay condition. The noise/whining comes from the belt and is reduced significantly after a few minutes .

The runout is quite low and there are no sloppiness in the spindle.

Unfortunatly, I have run out of space in my shop. I have a Thiel Index 159 and now a new cnc abene milling machine. I do not like the idea of selling the Lagun - but that could be an honest intepretation of the hard fact I have to deal with.

Bjorn
 
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