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Laser crosshair

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woodworker2001
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Joined: Fri Nov 04, 2016 1:57 pm
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Laser crosshair

Postby woodworker2001 » Sat Nov 19, 2016 9:56 pm

Designed this for a laser crosshair for the table at the school I teach at. 3D printed and bought the two 5v line lasers from eBay. Haven't had a chance to get it wired to see how it works but clams up nice and seems like it will work.
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sawdust1
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Re: Laser crosshair

Postby sawdust1 » Sat Nov 19, 2016 10:22 pm

How are you going to deal with the smoke and spatter of piercing?

David
home built 4x4 watertable. Qcad, SheetCam and Linuxcnc
Miller 375 Cutmate
Lincoln buzz box and a Miller Mig
KNK MAXX vinyl cutter
The adventure started with a Cricut cutter that I hacked.

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_Ogre
Posts: 478
Joined: Sun Sep 15, 2013 4:26 pm
Location: Motown
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Re: Laser crosshair

Postby _Ogre » Tue Nov 22, 2016 4:52 pm

if you need thoughts on wiring the lasers to work with mach3 bladerunner read thru the laser x-hair link in my signature
i used an old pc power supply and one of the switched outputs on the bladerunner control box
bulltear 4x8 cnc plasma table, candcnc bladerunner w/dthc, hypertherm powermax 65, sheetcam, mach3
laser cross hair for hypertherm torch http://www.plasmaspider.com/viewtopic.php?f=6&t=12508
an ogre smiley :mrgreen: how cool!

Bobcat320
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Re: Laser crosshair

Postby Bobcat320 » Wed Nov 23, 2016 11:46 am

My set up, all from eBay about $15. Uses AA battery pack
Attachments
image.jpeg
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PlasmaCam DHC2
Hyperthem PM65
Edwards 25T Ironworker
Miller Mig, Tig, Stick & Portable

Why pierce it when you can punch it!

woodworker2001
Posts: 23
Joined: Fri Nov 04, 2016 1:57 pm
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Re: Laser crosshair

Postby woodworker2001 » Thu Nov 24, 2016 10:11 pm

We shall see how it holds up to the sparks.
I appreciate the info on wiring. I am not running Mach 3 though. I just wired it to an old phone charger that puts out 5v. I have run it a couple times and seems like it should be ok.

Dana gear
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Re: Laser crosshair

Postby Dana gear » Tue Mar 14, 2017 11:52 pm

I don't know it there still available but we used a battery operated laser cross hair unit from Sears.
They were made for Sears drill presses , we fabricated a nylon bushing as the Sears unit had a slightly larger inside diameter then outside diameter of the plasma torch. 1.375"
It works great as the unit has its own clamp to choke it to the torch barrel. very easy on and off.
We simply cut lens covers from clear safety lens used in welding helmets to protect the laser, and attached with double sided tape.
The unit cost around 35 bucks from Sears. With the cross hairs powered up, a test pierce in 10 ga carbon was dead on as far as plasma accuracy would allow.


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