oval cut using Valiani CMC

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mtfuji
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oval cut using Valiani CMC

Post by mtfuji » Wed 09 Sep, 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

IFGL
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Re: oval cut using Valiani CMC

Post by IFGL » Wed 09 Sep, 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.

mtfuji
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Re: oval cut using Valiani CMC

Post by mtfuji » Wed 09 Sep, 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

IFGL
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Re: oval cut using Valiani CMC

Post by IFGL » Wed 09 Sep, 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.

Roboframer

Re: oval cut using Valiani CMC

Post by Roboframer » Wed 09 Sep, 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

Post by IFGL » Wed 09 Sep, 2015 9:19 am

I sorted mine out by actually fixing it :D

Roboframer

Re: oval cut using Valiani CMC

Post by Roboframer » Wed 09 Sep, 2015 9:21 am

OK - looking forward to sorting mine the same way then :-)

IFGL
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Re: oval cut using Valiani CMC

Post by IFGL » Wed 09 Sep, 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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IFGL
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Re: oval cut using Valiani CMC

Post by IFGL » Wed 09 Sep, 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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Merlin
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Re: oval cut using Valiani CMC

Post by Merlin » Wed 09 Sep, 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.
See Photo.
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Re: oval cut using Valiani CMC

Post by IFGL » Wed 09 Sep, 2015 10:50 am

Yours is cleaner than mine.

mtfuji
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Re: oval cut using Valiani CMC

Post by mtfuji » Thu 10 Sep, 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

Post by IFGL » Thu 10 Sep, 2015 3:27 am

Yeah you can adjust it., all it wil do is make the cut travel a bit further.

mtfuji
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Re: oval cut using Valiani CMC

Post by mtfuji » Thu 10 Sep, 2015 6:25 am

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

Thankyou so much
Mark

Graysalchemy

Re: oval cut using Valiani CMC

Post by Graysalchemy » Thu 10 Sep, 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:

Roboframer

Re: oval cut using Valiani CMC

Post by Roboframer » Thu 10 Sep, 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

Post by IFGL » Thu 10 Sep, 2015 7:15 pm

I like the sound of the algorithm, I can you buy them for the valiani?

IFGL
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Re: oval cut using Valiani CMC

Post by IFGL » Thu 10 Sep, 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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