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Re: Fire :(
Posted: Tue Oct 13, 2015 10:18 am
by llamalasers
Mine happened on the blades table.. which actually cleaned up surprisingly well since.
Daven wrote:I have wondered about rigging up some sort of adjustable heat detector that sits in the machine - phillydee - one for you matey
Definitely would be a very welcome gizmo!
Re: Fire :(
Posted: Tue Oct 13, 2015 10:36 am
by Lightnin
there used to be a system for car engine bays where there is an extinguisher connected to a plastic tube. the pressurised tube is placed where there might be flames, (that would be the lid of your laser) and if a fire starts, the tube melts/bursts and puts out the fire.
No idea if you can still get them.
Re: Fire :(
Posted: Tue Oct 13, 2015 10:55 am
by Daven
TimBobTastic wrote:is fire a higher risk on machined with honeycomb beds that sit in a pretty much enclosed tray?
If so... could the enclosed tray be modified so it was more open allowing for a better flow of flammable gasses...
Just thinking aloud really... probably a bad idea for reasons I have not thought of... But I have access to a friendly bunch of sheet metal workers and industry standard 3D CAD... so was wondering if a little design effort could reduce the risk of fire without making big changes to the machine (apart from swapping the honeycomb tray)
It depends from machine to machine I suspect. You can lift the tray up but make sure you don't trap the head when homing the table (z axis)
I have adapted my 3060 in a way that works really well, can't share at the moment sadly
Best
Dave
Re: Fire :(
Posted: Tue Oct 13, 2015 11:24 am
by Spooky
The problem with fire sensors is the way they work, they either sense IR from the flame source or heat, both of which happen in a laser machine anyways
Best way to avoid fires? watch the machine..hence the big warning stickers on them
Re: Fire :(
Posted: Tue Oct 13, 2015 11:45 am
by Lightnin
Tom wrote:Once a year that's terrible
no it isn't ???
I keep it clean all year round, but it gets a full service once a year !
Under the honeycomb gets all sticky .. I've tried lots of ways to get it all of, but I've found a blow torch or heat gun makes light work of it.
I know MDF will burn well once it's caught, but the sticky stuff doesn't burn easily
Re: Fire :(
Posted: Tue Oct 13, 2015 12:03 pm
by Spooky
Lightnin wrote:Tom wrote:Once a year that's terrible
no it isn't ???
I keep it clean all year round, but it gets a full service once a year !
Under the honeycomb gets all sticky .. I've tried lots of ways to get it all of, but I've found a blow torch or heat gun makes light work of it.
I know MDF will burn well once it's caught, but the sticky stuff doesn't burn easily
MDF has a water based glue, use clean water and soap
Re: Fire :(
Posted: Tue Oct 13, 2015 2:09 pm
by Lightnin
Spooky wrote:
MDF has a water based glue, use clean water and soap
I find once it's "baked on" soap and water doesn't touch it.
I made a raised honeycomb, and once it's all level, I don't like to disturb it that often.
The way I cut, I don't get debris build up, just this condensed MDF smoke stuff.
The rest of the machine comes clean with a regular wipe over with baby wipes.
Re: Fire :(
Posted: Tue Oct 13, 2015 3:56 pm
by LinkspanModels
Just read all this and want to thank you all for opening my eyes!!!
New machine arrives Thursday (our first!) and CO2 extinguisher has been ordered.........
Re: Fire :(
Posted: Tue Oct 13, 2015 5:14 pm
by Tom
Lightnin wrote:Tom wrote:Once a year that's terrible
no it isn't ???
I keep it clean all year round, but it gets a full service once a year !
Under the honeycomb gets all sticky .. I've tried lots of ways to get it all of, but I've found a blow torch or heat gun makes light work of it.
I know MDF will burn well once it's caught, but the sticky stuff doesn't burn easily
Ahh thought you meant you cleaned once a year
Re: Fire :(
Posted: Tue Oct 13, 2015 5:39 pm
by Tom
LinkspanModels wrote:Just read all this and want to thank you all for opening my eyes!!!
New machine arrives Thursday (our first!) and CO2 extinguisher has been ordered.........
Just listen to the engineer he will go though it all with you
And enjoy your new toy i mean machine