7/8/2018 4:53 PM | |
Joined: 4/2/2016 Last visit: 7/13/2022 Posts: 413 Rating: (6) |
Hi, How to increase the speed of the Basic positioner (EPOS)? We need to position as fast as possible from 0 to 180 degrees Using Sinamics S120, Basic positioner (EPOS). We have a servo based on
The drive is controlled by the PLC (Simatic S7-400) by Profibus (standard telegram 12x12). We use the Basic positioner (EPOS), Program traversing blocks. Two points: +180 degrees (+5000 LU) -180 degrees (-5000 LU) EPOS settings are maximum: Velocity 4 000 000 0 (1000 LU/min) Acceleration 100 % Deceleration 100 % Position controller P gain (servo gain factor) 8.0 With these settings, we measured the positioning speed (through the IBA system) And we received very bad results (for us) (We need to position as quickly as possible from 0 to 180 degrees) Measured positioning speed: • The positioning time from 0 to 180 degrees was ~ 140ms (we need 50ms); • The maximum speed in the positioning reached only ~ 400 rpm / min (the motor does not have time to accelerate to its nominal speed of 3000 rpm?) How can we increase the speed of positioning? We tried to increase the gain of the P gain (Position controller), but after 8 starts a large problems of regulation (overshoot). AttachmentSinamics CV4 Drv.zip (144 Downloads) |
Last edited by: _oleksandr_ at: 7/8/2018 4:58:54 PMLast edited by: _oleksandr_ at: 7/10/2018 12:22:47 PM |
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7/8/2018 4:54 PM | |
Joined: 4/2/2016 Last visit: 7/13/2022 Posts: 413 Rating: (6) |
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7/8/2018 4:56 PM | |
Joined: 4/2/2016 Last visit: 7/13/2022 Posts: 413 Rating: (6) |
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7/8/2018 4:56 PM | |
Joined: 4/2/2016 Last visit: 7/13/2022 Posts: 413 Rating: (6) |
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Last edited by: _oleksandr_ at: 7/8/2018 5:01:18 PM |
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7/9/2018 7:51 AM | |
Joined: 10/11/2006 Last visit: 10/30/2024 Posts: 5931 Rating: (813)
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Hello, as zako said correctly: One thing is to optimize the drive, which would be a little easier with FW5.1 and One Button Tuning. Here you could download the firmware: https://support.industry.siemens.com/cs/ww/en/view/109753109 You can do the upgrade on your own (just put the CF card to your computer and copy the downloaded files to it). The other thing is the correct parameterization of the basic positioner movement. And this is the first thing I would do. Check the dynamic limitation of the basic positioner. If your acceleration and deceleration setting is too low, then 100% acceleration override is also too low. The override is just a multiplier for the dynamic settings (limitations). So inrease your dynamic limits (maximum velocity, acceleration, deceleration and jerk). |
With best regards, |
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