topic Re: AGV Loading and Unloading times issue in FlexSim Forum

AGV Loading and Unloading times issue

SaiKrsih — Wed, 07 Jun 2023 08:39:30 GMT

[ FlexSim 23.1.0 ]

Hello Flexsim,

I am utilising a process flow logic to schedule batches of items and AGV travel. In my model a batch consists of 100 units.

I set the AGV's loading and unloading times to 30 seconds per batch.

Problem: The AGV takes 30 seconds per item instead of 30 seconds per whole batch, which means it takes 3000 seconds to load and unload 100 items. in order to load and unload.

I altered the timings to 30 milliseconds; as a result, the AGV loads and unloads the entire batch in 30 seconds (What i wished for).

To explain this I set Load and unload times of AGV 1 to 30 Millisec and AGV 2 to 30 Secs. After simulating the utilizations states are comepletly different.

Here, AGV dash board either showing too much loading and unloading utilization metrics for AGV 2 and no trace in case of AGV1

if my AGV makes 50 frequencies between a source and sink, then it will take about 50*30*2= 3000 seconds (50 min), it means the percentage of AGV utilization for loading and unloading for the whole time period of 50 min should be displayed in my dash board. But this stat seems to be a minuet or small one and is not getting rflected on my dash board.

Simply, my AGVs should load and unload whole batch in 30 sec instead of each item per 30 sec. Further, the percentage of time spent my the AGVs for loading and unloading should be displaed in the dashboard despite of its size or nature

Any suggestions on this issue please?

Load_Unload_Issue.fsm

Re: AGV Loading and Unloading times issue

jason_lightfoot_adsk — Wed, 07 Jun 2023 08:52:52 GMT

Change your process to perform one load task (eg. the first flow item) and then use the moveobject activity to move the rest of the items to the AGV.

Or divide the load time to make it per item.

Re: AGV Loading and Unloading times issue

moehlmann_fe — Wed, 07 Jun 2023 08:58:56 GMT

And take care to use the correct units/numbers. The load/unload time of AGV1 is currently set to 0.03ms (should be 300ms or 0.3s) in the attached model. It is not surprising that the resulting time of 3ms per batch is not visibly showing in the state chart.

Re: AGV Loading and Unloading times issue

SaiKrsih — Fri, 09 Jun 2023 06:27:18 GMT

Thank you @Jason Lightfoot and @Felix Möhlmann for your answers. I will make the changes as you both described