Downtime based on quantity of parts processed, specific tools, etc

Question

question

Julian Valdes asked Jun 07 2016 at 5:17 PM Herwina Richelle Andres commented Nov 13 2016 at 7:47 AM

Downtime based on quantity of parts processed, specific tools, etc

Do you know if we can set up a processor's break time based on the number of processed parts? Like for every 500 processed parts the processor will stop for 10 min tool change.

Software Version:

FlexSim 16.0.1

mtbf mttr breakdown scheduled down

· 2

Julian Valdes commented · Jun 07 2016 at 9:47 PM

Thanks a lot for both answers; still not clear how Flexsim manage something like CNC machines tool changes: one CNC has upto 12 cutting tools, each tool has a specific tool life and tool change time (setup time):

tool#1: change every 200 pc & it takes 300 sec setup

Tool#2: 500 pc / 150 sec setup

Etc.....

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Jeff Nordgren Julian Valdes commented · Jun 08 2016 at 10:17 PM

This is a related question, but one that's more specific than your original question. We've moved this comment to its own question here.

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Answer 1 · 2016-06-07T17:37:17Z

Matthew Gillespie answered Jun 07 2016 at 5:37 PM

This model shows how you could do it using Process Flow.

The Wait For Event activity waits for the output of the processor to reach 5 and then the processor breaks down. After the break down the label is incremented by 5 so now the Wait For Event is waiting for the output to reach 10.

breakdowns.gif (300.9 KiB)

breakdownafterxitems.fsm (21.7 KiB)

Answer 2 · 2016-06-07T21:11:50Z

Brenton King answered Jun 07 2016 at 9:11 PM Herwina Richelle Andres commented Nov 13 2016 at 7:47 AM

Julian,

Not sure if you have joined the Process Flow craze yet? :) If not, here is an easy way to do it with the processor.

It is a picklist option in the setup field.

2016-06-07-15-09-46.png (27.2 KiB)

· 3

Julian Valdes commented · Jun 09 2016 at 10:19 PM

Can use the same function: "Different time for Nth Item", but on the MTBFMTTR Parameters Window? So I can set up multiple downtimes frequencies:

Every 200 processed parts (down for 4 min)

Every 500 (down for 10min)

0 ·

Joerg Vogel Julian Valdes commented · Jun 10 2016 at 3:40 PM

MTBF/MTTR is time based, you can use this method only if every absolutely every process time is the same. Then you can set the MTBF to a set of states on the "Breakdowns" tab for processing.

That works, because the a single constant process time is equal to the processed item.

please take a look at, too.

https://answers.flexsim.com/questions/22609/cnc-machine-and-tool-changes.html#answer-22614

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Herwina Richelle Andres commented · Nov 13 2016 at 7:47 AM

lot-flow-1-plane-customstate-2-itemtype2.fsm

Hi @Brenton King.

I did try your suggestion in using Different Nth Time on Set-up.

I have ticked use operator(s) for set-up with a value of 1 to cater this activity. However, I am not sure if it did work. My intention is for the operator connected at port 1 be used. The Mean Units Between Assists (MUBA) is set to 2 and will be assisted for 10 minutes. Another question would be is, does this function resets for every job? Different jobs would have start at zero value then accumulate.

Also, I would be needing to set the state of Plane17 on the following events:

#define CustomState_IAA 8 --> the delay time (10 minutes)

#define CustomState_WaitForOp_IAA 9 --> if when it requested for the operator and the operator can not attend to it yet

By the way, is the process flow function available in 7.5.2?

Thanks a lot!

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lot-flow-1-plane-customstate-2-itemtype2.fsm (138.6 KiB)

muba.jpg (169.3 KiB)

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