PushPullfeeder - Can the feeder be lengthened?

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uavfligh...@gmail.com

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2022年7月27日 17:47:252022/7/27
收件人 OpenPnP
The distance beween my camera and nozzle means that my nozzle crashes into the lever when the camera is over the pick position.  I need to extend the distance between pick position and the lever, extrusion, reel,  etc..

I have found several parameters that move items but not a magic combination that fixes everything.  Any hints would be welcome.

/Matt

uavfligh...@gmail.com

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2022年7月27日 18:18:172022/7/27
收件人 OpenPnP
I might have figured it out.  

Extrusion mount - extrusion mount edge x
Base Plate - base begin
Lever- ever axle x
Cover tape spool - spool axle x
Dog - dog offset

// Dog aproximative offset from pick location (will be aligned with nearest sprocket pitch)
dog_offset=-24; // [-44:4:-2]
needed to have its comments changed in the customizer to give enough range for the extension I need.

Would like to move the spent tape chute attach point forwards so the chute stays the same shape as the original.



Screenshot from 2022-07-28 00-08-12.png

mark maker

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2022年7月27日 19:28:562022/7/27
收件人 ope...@googlegroups.com

Hi Matt,

I guess it is possible but very difficult. This was really a tough optimization process. Frankly, I would consider moving the camera instead (make a different camera holder, prehaps).

Moving the camera closer to the Nozzle Y is generally a good idea. The Y axis is usually the slowest to accelerate, the switchover from feeder vision camera location to the nozzle pick location will be faster, not just for the push pull feeder but for all types of feeder with vision.

_Mark

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uavfligh...@gmail.com

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2022年7月28日 03:26:582022/7/28
收件人 OpenPnP
I will test it how it is.  If it is a problem I can look at moving the tape chute hinge point.

There is no good way to get the camera much closer.  The camera is on a Y-axis offset to give me more X-axis movement.  I am at the limit of the camera dimension and nozzle assembly dimension.  Redesigning this is pretty close to being a completely different machine.

/Matt




uavfligh...@gmail.com

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2022年7月28日 03:34:352022/7/28
收件人 OpenPnP
I forgot an item.  Revised list adds "Springs - block axle x":

Extrusion mount - extrusion mount edge x
Base Plate - base begin
Lever- ever axle x
Cover tape spool - spool axle x
Springs - block axle x
Dog - dog offset

// Dog aproximative offset from pick location (will be aligned with nearest sprocket pitch)
dog_offset=-24; // [-44:4:-2]

uavfligh...@gmail.com

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2022年7月28日 13:48:202022/7/28
收件人 OpenPnP
A quick test print shows that it is not ok.  Many fixes to do.


Also add:
Logo and Text ->
  logo x
  logo text x
  logo tag x

uavfligh...@gmail.com

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2022年7月28日 14:09:152022/7/28
收件人 OpenPnP
add  Tape Inset -> tape inset begin

uavfligh...@gmail.com

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2022年7月28日 15:34:292022/7/28
收件人 OpenPnP
yet another tweak.  Reduce the angle on Spent tape Chute -> tape chute pivot angle.

uavfligh...@gmail.com

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2022年7月29日 02:33:352022/7/29
收件人 OpenPnP
Moving the spent tape chute fixture point needs a small code change:

// Fixture offset x
tape_chute_offset = 24;

tape_chute_fixture_x=extrusion_mount_x+extrusion_mount_w/2+extrusion_mount_strength/2+fixture_axle/2+tape_chute_offset;

I have not test printed yet but I believe this the last required change.
Would be good to have a single extension parameter but this will do for now.

/Matt

uavfligh...@gmail.com

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2022年7月29日 17:47:172022/7/29
收件人 OpenPnP
Modified the design with a simple to use single pick offset in the customizer.
Pull request is here

Not sure this one is for everyone.  Maybe best that I maintain it for myself only.

/Matt

mark maker

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2022年7月29日 17:57:362022/7/29
收件人 ope...@googlegroups.com

Hi Matt

much appreciated. Will look at it, but it is too late today ;-)

_Mark

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