"DISCARD" button doesn't work as expected, how to fix it?

[Evgenij Rakhno]

When customer "grab" some item by taking it from tray via "pick on a selected feeder" or during "job" - "discard" button work as expected - head moves to discard place, than "drop" item to "discard" location.

So, logic for "discard" is "move to location and "drop" item". That's OK and it should work this way.

But when I move nozzle manually to some location and "grab" item via "actuator -> vacuum on" "discard" doesn't work, because openpnp think, that's nozzle doesn't have anything, so, when I press "discard" openpnp do nothing. this is not OK.

Let me explain. I'm work in embedded area for 20+ years, so, I learn just from begging, that's if someone press "STOP" button I must perform "stop" procedure ever if all my stats say, that's system doesn't moving.

As I think the same situation with" discard" - if user press "discard" he see by his eyes, that's nozzle hold some item and that's why he press "discard" - to discard this item

"discard" button situated on the "special" tab, so, firstly user must click "special", than found "discard "and press it. So, if customer press "discard" he doesn't made it "occasionally"

If someone from development team know how to fix this issue - please fix it :)

Regards, Evgenij

[Toby Dickenson]

Yes, that makes sense to me. Its now on my to-do list :-)

Toby

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[Evgenij Rakhno]

One more thing about "discard"

I have machine with 4 nozzles

during places process can be situation, when all 4 nozzles hold some items, but for 1 nozzle something go completely wrong, so, I need to start from beginning for this nozzle.

But when I press "discard" all 4 nozzles go to discard place and drop everything what they hold

If all 4 nozzles take part from different "reference tube" (tray where user must put item at the same place by hands every time) - its really frustrated me :)

I think it will be nice to have two buttons - "discard current" and "discard all"

Regards, Evgenij

[Toby Dickenson]

This is now https://github.com/openpnp/openpnp/pull/1890

[Evgenij Rakhno]

I will understand how to update current software and will try it!
thanks a lot!

[Toby Dickenson]

Currently you would need to use git to merge that PR branch, and compile it yourself. If that sounds achievable then please do so because the feedback and user testing will be welcome.

Alternatively you could wait a few weeks until it is merged, and simply download the test branch.

Toby

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