oval cut using Valiani CMC

Computerised Mount Cutters, Computers, other gadgetry.

oval cut using Valiani CMC

Postby mtfuji » Wed Sep 09, 2015 6:08 am

Hi
I have a Valiani Mat Pro iX CMC which I love
However I find lately that oval cuts are not going the whole way round.
It will cut arches and other fancy cuts and also small ovals but anything over about 250mm and the cut comes up short.
I use V studio but I also tried on FMD and it had the same problem
Techs in Australia don't know the solution so I am wondering if anyone else has had this problem and knows how to fix it

Many thanks

Mark
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Re: oval cut using Valiani CMC

Postby IFGL » Wed Sep 09, 2015 7:00 am

Yes :D

There is a little white plastic topped screw on the back of the machine, this determines how far round it travels when cutting ovals, there are two of these on the front for the start and stop points for straight cuts, bare with me I will find a photo.
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Re: oval cut using Valiani CMC

Postby mtfuji » Wed Sep 09, 2015 7:43 am

Thanks :D
I can see the 2 on the front but not the one on the back
a photo would be great
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Re: oval cut using Valiani CMC

Postby IFGL » Wed Sep 09, 2015 7:58 am

I can't find one on the tinterweb, I will get Jamie to photograph it when he gets in, it's my day off today.
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Re: oval cut using Valiani CMC

Postby Roboframer » Wed Sep 09, 2015 9:15 am

I've had this problem for ages, on tiny ovals it does about 3 complete laps and on huge ones it stops about 40mm short!

But it's only on the green head, not the yellow head, so I don't see how it can be fixed on the machine, surely it's done in settings?

I get round the problem by turning the design 180 degrees and re-cutting!

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Re: oval cut using Valiani CMC

Postby IFGL » Wed Sep 09, 2015 9:19 am

I sorted mine out by actually fixing it :D
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Re: oval cut using Valiani CMC

Postby Roboframer » Wed Sep 09, 2015 9:21 am

OK - looking forward to sorting mine the same way then :-)
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Re: oval cut using Valiani CMC

Postby IFGL » Wed Sep 09, 2015 9:27 am

So it is right at the back at the end of the long boom it has a locking coller that may have come loose.

All the machine settings have to control physical things, and all of these need to be set up correctly to work,
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Re: oval cut using Valiani CMC

Postby IFGL » Wed Sep 09, 2015 9:32 am

It will always go quite away further round on small ovals because it lowers the head incrementally on these to create a smooth entry and a nice oval.
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Re: oval cut using Valiani CMC

Postby Merlin » Wed Sep 09, 2015 10:39 am

Mark. Can you send your CMC serial number please.
The reason is if the machine is before 2007 there is not a screw regulator on the back of the Y arm.
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Re: oval cut using Valiani CMC

Postby IFGL » Wed Sep 09, 2015 10:50 am

Yours is cleaner than mine.
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Re: oval cut using Valiani CMC

Postby mtfuji » Thu Sep 10, 2015 2:44 am

I have that screw regulator on mine.
The coller seems fine
Can I adjust it?
And yes Merlin yours is cleaner than mine too
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Re: oval cut using Valiani CMC

Postby IFGL » Thu Sep 10, 2015 3:27 am

Yeah you can adjust it., all it wil do is make the cut travel a bit further.
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Re: oval cut using Valiani CMC

Postby mtfuji » Thu Sep 10, 2015 6:25 am

wow !
half turn anti-clockwise and it cuts like a treat

Thankyou so much
Mark
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Re: oval cut using Valiani CMC

Postby Graysalchemy » Thu Sep 10, 2015 8:19 am

Wow I am intrigued to see you poor valiani users have to set something for this. The trucut has an algorithm in the software which adjusts the amount of cut depending on the diameter of the oval, perfect cut every time :giggle:
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Re: oval cut using Valiani CMC

Postby Roboframer » Thu Sep 10, 2015 9:12 am

The Val software can also adjust the cut, has to, for different thickness boards at least.
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Re: oval cut using Valiani CMC

Postby IFGL » Thu Sep 10, 2015 7:15 pm

I like the sound of the algorithm, I can you buy them for the valiani?
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Re: oval cut using Valiani CMC

Postby IFGL » Thu Sep 10, 2015 7:24 pm

Users don't really have to fiddle with that screw, it's set up at the factory and the rest is done on the machine settings, I managed to alter mine when I moved the machine, must have caught the screw some how, anyway easy fix and should not need faffing with again.
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