[chbot] anyone got access to a cnc for water/laser cutting of Perspex?

[Kay edgecumbe]

crc- oil -water -all just to cool the cutting area  acetone is one of the solvents  oils dont seem to effect it as long as cleaned after
Date: Thu, 15 Dec 2011 16:10:54 +1300
From: chris at trash.co.nz
To: chchrobotics at lists.linuxnut.co.nz
Subject: Re: [chbot] anyone got access to a cnc for water/laser cutting of Perspex?

Hi Kay,
 
Do you find the perspex becomes brittle after having CRC on it?  Depending on what type of acrylic / perspex it is you can get some weird issues when it comes into contact with solvents and oils.   Had thought that CRC was one that caused issues, but I might be wayyyy off the mark.  I do know that isopropyl causes moulded acrylic to 'craze' quite quickly, but not the cast stuff.
 
As an aside I get acrylic, PVC and lexan sheet from Mulford Plastics in the city, they have all sorts of good stuff in their off cut bins for not too much money if you're looking for robot chassis bits.  (or in my case sign lettering, insert kick-me sign here. --> <-- )
 
Cheers, Me.
 
-----Original Message-----
From: "Kay edgecumbe" <kayedgecumbe at hotmail.com>
Sent: Thursday, 15 December, 2011 06:50
To: "ch ch robotics robotics" <chchrobotics at lists.linuxnut.co.nz>
Subject: Re: [chbot] anyone got access to a cnc for water/laser cutting of Perspex?




i find no problems with a fret saw and crc oil the final shaping with file and sand paperi have limited amount of 8mm perspex ph 9814888





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