Juki Pick and Place experts ?
jmg
Posts: 15,173
Someone here might know the quick answer to this.
Our assembly house stumbled a little on a board edge change, but I would have expected that to be a simple proximity (re) setup, as the first fiducial seek is machine/conveyer related and not in any PCB CAD file.
Once it knows where that first fiducial is, then all P&P is relative to that.
Google is not much help, but my terminology may be off.
Does anyone know how to change the first seek location, ie where the machine first pans to, to capture/lock the reference on the camera.
My common sense guess is there is some simple process of manual pan, then a 'This is zero' button/command, and it is that easy to re-set any panel edge variances.
After that, the machine always goes first to that (appx) location to get the exact 'panel zero' from the camera.
Our assembly house stumbled a little on a board edge change, but I would have expected that to be a simple proximity (re) setup, as the first fiducial seek is machine/conveyer related and not in any PCB CAD file.
Once it knows where that first fiducial is, then all P&P is relative to that.
Google is not much help, but my terminology may be off.
Does anyone know how to change the first seek location, ie where the machine first pans to, to capture/lock the reference on the camera.
My common sense guess is there is some simple process of manual pan, then a 'This is zero' button/command, and it is that easy to re-set any panel edge variances.
After that, the machine always goes first to that (appx) location to get the exact 'panel zero' from the camera.
Comments
Can you post a pic of the board edge causing the issue?
Are you using a standard fiducial?
What shape is the perimeter of the board (do you have two parallel edges).
Do you know what Juki models are being used? I have four 2070, two 2080, and one JX-100 LED.
How much conveyance clearance do you have on the edges?
I'll ask what model Juki they have.
The board maker moved the Panel edge ~ 3mm, between runs, which I thought would be a simple re-zero step somewhere (but I do not know Juki ), the P&P contractor is claiming it is more work.
I can see 3mm is probably (just?) outside the 'capture' range of a camera, but a new 'look about here' XY is all I would think is needed ?
What procedure do you use on the Juki you have, to 'set' a new PCB panel edge, for the first fiducial capture/cal ?
If the Panel edge/corner moved 2~3mm between batches, how would you correct for that ?
Once there, the outside corner of the board or panel should be at the "Layout End" shown by the blue X. This should be against the fixed conveyor rail in the Y dimension and at the PCB stopper position in the X position; therfore a known position by the machine.
The "Reference point" shown by the red dot is the corner of the individual board that would normally be assigned as 0,0 in the placement data used for the machine.
Then the fiducials can be found by their X,Y in relation to that reference point as long as the board is positioned where it is expected.
If the dimensions are changed, the fiducials will be in a different place in relation to this reference point and thus will need to be updated. Normally, this would be adjusted in the placement data for the Juki program but it also can be adjusted directly on the machine. Each of the position locations I have mentioned can be set at the machine by entering new values or by jogging the machine's head into location using the handheld controller.
Cool, thanks, that's exactly what my instincts were telling me would be possible.