E Stop Boxes (Amerikan FDA safety)

[dsli_jon]

..Already well-stated, but I'll voice my support for the good 'Best Practices' answers, above..

..can you have it just at an accessible location (next to laser)?

..and if the laser is 16' up in a box-truss / 9' up on a tri-mount / on some other-rig, behind the DJ? I'm sure you can 'extrapolate the point'...

so do you have this with you at the location you control from..

Sure-do.. The - whole idea - behind Interlocks / keyswitches / beam-shutters - and E-Stops - is positive, cognisant-Operator control *at All-times*... And the 'quick-access' an E-Stop affords - right at the Op's controls / reach (otherwise, what's the point, really?) may, indeed, make 'the difference', between someone getting hurt / an injury-suit, etc, etc.. Or not..

.Ya, the 'Regs' may sometimes seem 'restriktiv' but.. Some 'restrictions' are just a good-idea.. (ie: seat belts, etc..) Anyhoo, you get the point..

Some 'light reading' for you.. http://www.fda.gov/MedicalDevices/De.../ucm094361.htm ..What's (still) required, safety-controls-wise, and.. Why... Here's further insight into the 'rationales'.. (PDF) http://www.fda.gov/downloads/Medical.../UCM119257.pdf ..And http://www.fda.gov/MedicalDevices/De.../ucm094445.htm

cheers..
j

[lightlinked]

so are you using a DB9 connected interlock switch with restart delay?
more precisely, in America, are you required to run estop to, what is often a DB9 connector for interlock (this is another cable) , or is it fine to use the interlock over the ilda connection as our UK friends do?

[dsli_jon]

so are you using a DB9 connected interlock switch with restart delay? or is it fine to use just the interlock over the ilda connection?

Restart-delay is a 'separate entity' / circuit in the PJ, from the Interlock-loop - but, it can, and should, work 'in-tandem'.. ie: breaking the Interlock-loop causes the 'restart delay' circuitry to trip / keep the Emission at-bay, *untill* the fault / situ in room is cleared / the Operator 'positively' re-engages / initiates Emission (ie: a 'start' button / keyed e-stop, etc)

The DB-9 is just a 'convenient' *optional* extension of the Intlk-loop that ties-into the ILDA-connx loop, to make a 'remote interlock' (ie: E-Stop) easier to integrate, w/o having to 'yank the DB-25' to break the loop.. However, a DB-9, in and of-itself, is not some "9-pin requirement", ie: andy-con's fine quad-ILDA I/O example there, etc.. It's also useful for, ie: when, a PJ has 'local modulation-input override' (It has a button / switch, etc to get laser-output w/O an ILDA-sig In..) and the DB-9 would serve for a 'remote-interlock', in such a case..

For a 'DIY' situ, products like this: http://shop.stanwaxlaser.co.uk/ilda-...board-55-p.asp ..make quite quick werk of it, especially with that nice 'Panel-mount plate' option, w/ the DB's all ready to rock, etc..

.02
j

[drm916]

In the US you are supposed to have a remote interlock connector. It can be any design that you like. I myself use stanwax boards and daisy chain my estops. The first projector needs 5 pins. Each additional projector needs only 3. I use DB9 because it convenient and most projectors already have the hole cut for it in the back panel.