I took the lens assembly from a small broken video camera and stuck the sensor from a usb cam to the end of it. The sensor had to be mounted about 2cm further back to allow for close up shots. The lens has 2 small stepper motors to adjust the 2 lenses.
In version 1, I damaged the stepper motors trying to unsolder them from the flex cable, so I created small hand wheels from layers of heat shrink tubing. That allowed me to zoom and focus, but after time, the vibration from the machine caused it to drift. I'm working on version 2 with a new lens assembly. This time I left the flex cable on the lens so I can now connect to the stepper motors and the optical home sensors. I've got a working prototype, but I still need to work out how to mount it permanently so I can adjust it to be parallel with the z-axis, and enclose it. Frank -----Original Message----- From: Russell Brown [mailto:[email protected]] Sent: Thursday, 7 November 2013 10:16 PM To: [email protected] Subject: [Emc-users] USB Camera for edge finder? I've been playing around with camview and a little 10mm endoscope type USB camera to see if I could rig such a thing up as an edge finder permanently mounted my mill's head. That's OK but you have to get very very close to the workpiece for even a half decent resolution which doesn't work when there's a collett holder and tool in the spindle (part of the reason for doing this is to avoid chucking the edge finder so I don't want a spindle type camera). I also tried a USB 'microscope' but the depth of field is very small again you have to get pretty close and twiddle with the focus to get a useful resolution. Has anyone found a USB camera with both a high magnification and a decent depth of field? (I've a feeling that these are mutually exclusive) or even one that can focus at a high resolution from a workable (~200mm?) distance? TIA -- Regards, Russell -------------------------------------------------------------------- | Russell Brown | MAIL: [email protected] PHONE: 01780 471800 | | Lady Lodge Systems | WWW Work: http://www.lls.com | | Peterborough, England | WWW Play: http://www.ruffle.me.uk | -------------------------------------------------------------------- ---------------------------------------------------------------------------- -- November Webinars for C, C++, Fortran Developers Accelerate application performance with scalable programming models. Explore techniques for threading, error checking, porting, and tuning. Get the most from the latest Intel processors and coprocessors. See abstracts and register http://pubads.g.doubleclick.net/gampad/clk?id=60136231&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ November Webinars for C, C++, Fortran Developers Accelerate application performance with scalable programming models. Explore techniques for threading, error checking, porting, and tuning. Get the most from the latest Intel processors and coprocessors. See abstracts and register http://pubads.g.doubleclick.net/gampad/clk?id=60136231&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
