Denford Software & Machines

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 Post subject: lots of smoke produced -fuses and filters changed
PostPosted: Tue 16 Sep , 2014 9:38 am 
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Joined: Tue 16 Sep , 2014 9:08 am
Posts: 3 Hardware/Software: 2D design
Versalaser VLS3.50
we have had our VLS3.50 in school for 4 years with no problems but yesterday it started to produce a lot of smoke when cutting. I have cleaned the main enclosure, the optics the fan filters and the engraving table. I have also tried checking the fuses (on the back by the 'kettle like plug') which are fine and have tried taking the filter out of the ait filtration unit to crudely check if they were blocked but with no effect. My guess is that the exhaust is not extracting properly....Do you have any other suggestions?


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 Post subject: Re: lots of smoke produced -fuses and filters changed
PostPosted: Tue 16 Sep , 2014 21:23 pm 
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Joined: Fri 24 Feb , 2006 17:09 pm
Posts: 1501
Location: Brighouse
Check you have air flow at the outlet manifold on the back of extraction cabinet when it is running.

Also check the air assist is blowing out of the air assist cone.


The fuses for the Bofa extraction unit are behind the left band side end cover.


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 Post subject: Re: lots of smoke produced -fuses and filters changed
PostPosted: Tue 16 Sep , 2014 21:43 pm 
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CNC Expert
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Joined: Tue 29 Apr , 2014 18:38 pm
Posts: 256 Hardware/Software: Starturn 5 (sort of running)
Lathe cam designer V1.11
FANUC offline and online programs.

Roland CAMM3 (running with the software below)
Techsoft 2d Design tools V1 > V2
ProDesktop
Creo Parametric
Deskproto
I don't know if the extraction motor unit is the same as the VL300 we have had for 10yrs. The brushes on these wear down and can cause the motor to stop working correctly.
I have found 1 brush will wear about twice as quick as the other. Last time one failed it burnt out the relay which is switched via USB from the PC. So the brushes and relay had to be replaced.

Pete


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 Post subject: Re: lots of smoke produced -fuses and filters changed
PostPosted: Wed 17 Sep , 2014 6:21 am 
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Joined: Fri 24 Feb , 2006 17:09 pm
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Location: Brighouse
I presume the unit we are talking about is a Bofa extraction cabinet & not the ULS extraction, The Bofa unit filters are behind the hinged end panel & the ULS filters in the 2 front drawers.


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 Post subject: Re: lots of smoke produced -fuses and filters changed
PostPosted: Wed 17 Sep , 2014 10:54 am 
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Joined: Tue 16 Sep , 2014 9:08 am
Posts: 3 Hardware/Software: 2D design
Versalaser VLS3.50
yes its a Bofa extraction unit - I checked the air flow at the outlet and there is good airflow I have also checked that there is air from the air assist cone. I'll check the brushes today but as the motor is running I don't think this is the case?


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 Post subject: Re: lots of smoke produced -fuses and filters changed
PostPosted: Wed 17 Sep , 2014 18:06 pm 
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Joined: Fri 24 Feb , 2006 17:09 pm
Posts: 1501
Location: Brighouse
Does it cut?


Make sure the focus height is correct& the focus lens & air assist cone clean.

Not sure the Bofa unit has any brushess but it does sound like the unit is working correctly.


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 Post subject: Re: lots of smoke produced -fuses and filters changed
PostPosted: Mon 22 Sep , 2014 10:39 am 
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Joined: Tue 16 Sep , 2014 9:08 am
Posts: 3 Hardware/Software: 2D design
Versalaser VLS3.50
Yes it does cut, extractor seems to be OK and I think there is plenty of air from the assist air cone. there is a hiss coming from the air supply - but I can't find where from and the teacher who usually uses the machine thins that it is normal and has been there for some time.


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