On Friday 02 May 2014 12:14:04 Jon Elson did opine: > I know there has been some discussion about using cameras > for center/edge finding with LinuxCNC. I just found a > camera/microscope that looks REALLY ideal, but have no > idea if there is a Linux driver for the camera chip. > > See eBay item > > http://www.ebay.com/itm/321060396782?ssPageName=STRK:MEWAX:IT&_trksid=p3 > 984.m1423.l2649 > > eBay item # is 321060396782 if the above line is messed up. > > it is 7 mm diameter, says 200X magnification. > What I'd do is take a 3/4" R-8 end mill holder and > fab a ring to permanently hold the scope, and > have a groove for the cord to come out. Then, > I'd find whatever pixel on the camera is at the > center of rotation and make a permanent > assignment of that pixel for the crosshairs. > > But, the eBay listing only specifies XP drivers. > So, does anybody know how to find out whether there > is a Linux driver for this camera? Any other comments > on suitability of this unit? > > Thanks, > > Jon
I have one similar to that Jon, paid 22$ for it on fleabay, and am using the camunits drivers. Other than the lag of the image getting thru all the filters, about 4 seconds to update the screen when you move it, and the fact that it has self illuminating leds wrapped around the lens, making it somewhat less useful when the target is shiny (most metals are) because of the almost dead on illumination, it works well. I usually turn the dimmer in the cord down to nearly off & use a strong low angle illumination from the side which doesn't give near as much specular illumination. But I don't have it spindle mounted, it is in a block of alu that I drilled for setscrews used to align the cameras center pixel with the non- adjustable crosshairs inserted by on of the filters, mounted on the right side of the spindle casting by 1 screw & some Goop. So its about 1.5" from the spindle centerline. There are added buttons the align software puts up in the right hand panel, which can be use both to calibrate the offset, and to move the mill itself back and forth by the amount of offset determined. Once calibrated, that also works well. It also includes a means like for circuit boards, where you can drill a couple #80 witness holes, flip the board over and align the backside of the board even if its rotated an arbitrary amount by auto- compensating the co-ordinate system for the back of the board. Time to go put on a nose bag according to the better half. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS ------------------------------------------------------------------------------ "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE Instantly run your Selenium tests across 300+ browser/OS combos. Get unparalleled scalability from the best Selenium testing platform available. Simple to use. Nothing to install. Get started now for free." http://p.sf.net/sfu/SauceLabs _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
