Electronics Forum | Wed Sep 05 18:30:32 EDT 2007 | gmoritz
insert the bug, ... let it rotate ... see how far off the bug's leads are from center, When the head rotates, it rotates about the center (long) lead of the bug. Therefore, the x/y position of that lead does not change as the head rotates. > ...
Electronics Forum | Fri Nov 10 07:05:28 EST 2017 | emeto
The real question is: Where is your rotation point?
Electronics Forum | Thu Apr 14 13:53:39 EDT 2005 | jdengler
The board warp is a good place to look. Also: -Are you pre-rotating? -Are you using the largest nozzle possible? Most of the time this ends up being a component slip on the nozzle caused when the part is rotated if not doing pre-rotate, or slippa
Electronics Forum | Fri Nov 12 14:26:52 EST 2004 | Kang
Double check if the part's rotation happened before camera or after (pre-rotation). Make sure no grease on rotation clutch.
Electronics Forum | Fri Jan 11 16:18:48 EST 2008 | jlawson
Valors new Vplan NPI solution includes comprehensive rotation correction and virtual sticky tape to eliminate rotation errors in final SMT machine programs, you can learn a customers source CAD rotation info for use later again and again...regardles
Electronics Forum | Thu Mar 15 17:50:18 EDT 2018 | sarason
Possibly a loose grub screw on one of the shafts controlling rotation or the sensor ot gray code wheel on the rotation servo motor. or even a small fault in the program eprom, Good luck sarason
Electronics Forum | Thu Sep 06 10:17:44 EDT 2007 | slthomas
"When the head rotates, it rotates about the center (long) lead of the bug. Therefore, the x/y position of that lead does not change as the head rotates." Heh-heh. You'd think so, wouldn't you? Have you observed this with a magnifying glass? What
Electronics Forum | Thu Feb 27 14:41:48 EST 2003 | jax
Cad rotation should not change with relation to how the part is presented to the machine. It should only depend on how the part is orientated on the PCB when the PCB is at 0 rotation. There is a seperate field to input part rotation inside a feeder.
Electronics Forum | Wed Aug 10 20:30:49 EDT 2005 | slthomas
I've got a new board (actually a new panel...a 4 up, with one row rotated, where it was a 2 up panel with no rotation before) that runs fine on the IVc but not on the IIIc. I've used the same reference points for the image rotation (fiducials) on bot
Electronics Forum | Wed Aug 19 01:00:13 EDT 2009 | sergey2007
Hi! Thanks to everyone! Josh, I don't think it could be something wrong with the mechanics, as just one component was rotated. Anyway, we will check the mechanical parts of the oven. LarryD, thank you for the advice. But what is the physics of the
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