topic Re: Conveyor buffer and last in first out in FlexSim Forum

Conveyor buffer and last in first out

PeterHe2 — Thu, 09 Mar 2023 09:30:45 GMT

[ FlexSim 22.2.0 ]

Empty Tote Buffer And Return.fsm

Hi Everyone:

The empty Tote output from the secondconveyor to the "A" "B"conveyor Buffer.

I want to do three ations:
Action1:"A"and "B" area is the combiner's empty tote buffer.how to do?

Action 2 ：The empty Tote is first transmitted to "A",when area "A" is full ,Tote is second transmitted to "B"

Action3: Empty tote in "B" area ,But "B" area tote output mode is "last in first out"

How can i finish the above , thanks in advance!

Re: Conveyor buffer and last in first out

jason_lightfoot_adsk — Thu, 09 Mar 2023 16:25:08 GMT

It sounds like you'll need to reverse your conveyor - you do that by setting the target speed property to the the negative of it's current value.

The coordination of this and the needs to start and stop the conveyor will probably be best done in a process flow.

Re: Conveyor buffer and last in first out

PeterHe2 — Fri, 10 Mar 2023 07:52:46 GMT

@Jason Lightfoot

Hi Jason Lightfoot:

I am beginer, Do you have time to help me build a process flow?

Thanks

Re: Conveyor buffer and last in first out

jason_lightfoot_adsk — Fri, 10 Mar 2023 08:50:38 GMT

It doesn't have to be a process flow - you may get some way using a single photo-eye and messages. I recommend you look for the conveyor related tutorials and APIs in the online help, and build small test models just to prove the concept before trying to apply it in your model. If you get stuck post it here and someone will help you with your current hurdle.

When I get a chance I will try to build an example for you but can't say when that will be.

Re: Conveyor buffer and last in first out

moehlmann_fe — Fri, 10 Mar 2023 10:40:04 GMT

Would it be an option to model the upper buffer as a push back rack instead?

That would eliminate the need to reverse the conveyor and simplify the release logic.

PushBackBuffer_fm.fsm

Re: Conveyor buffer and last in first out

PeterHe2 — Sun, 12 Mar 2023 05:27:02 GMT

box last in first out.fsm

@Felix Möhlmann @Jason Lightfoot

Hi :

I used decide point to implement some of the functions.

But when i was doing LIFO is failed. what method should be used to solve this problem.

Thank you advance!

Re: Conveyor buffer and last in first out

jason_lightfoot_adsk — Sun, 12 Mar 2023 12:23:20 GMT

Here's a working example showing the principle of using a reversing conveyor with photoeye feeding two stations:

reversingBufferConveyor.fsm

Re: Conveyor buffer and last in first out

PeterHe2 — Mon, 13 Mar 2023 00:45:26 GMT

Hi Jason:

You solved my problem very well

Thanks very much!

Re: Conveyor buffer and last in first out

PeterHe2 — Mon, 20 Mar 2023 11:45:58 GMT

@Jason Lightfoot

Hi Jason Lightfoot:

I have one more Problem，As show in the following picture:

Two conveyor star and stop at the same time.fsm

How to make the yellow conveyor and "StraightConveyor2"

start and stop in the same time.I add a motor,but i don't control it.

Re: Conveyor buffer and last in first out

jason_lightfoot_adsk — Mon, 20 Mar 2023 14:21:53 GMT

You can only tell the motor to stop or resume so to reverse, each conveyor needs to be changed.

In the attached model I added a user command 'setMotorSpeed' which you can use to change the speeds of the conveyors by referencing the motor rather than a group.

two-conveyor-star-and-stop-at-the-same-time_jl.fsm

Re: Conveyor buffer and last in first out

PeterHe2 — Sun, 26 Mar 2023 03:25:26 GMT

Thanks for your reply Jason,you solved the problem.