adccommunitymod (AutomationDirect) asked a question.
Created Date: June 07,2009
Created By: pj.meza
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Hi, I have a system where it will be updated with a Servo System. The system is a rotational table that needs to be loaded with a conveyor. The Servo motor will move the conveyor 30 inchs once the table is moving from 0 to 260 deg, stop and wait from 261 to 360 deg. The cycle will continue as long as the conveyor has product on it (Photoswitch will sense it). If the conveyor does not have any product, the rotary table will stop between 180-190 deg. The rotary table will be moved with a motor-Frequency Drive. I know that I can use Proximity switches and cams to send signal from the table degree positions, however, i would like to use and Encoder instead, but I dont know if that is posible to connect it directly to the Servo Drive. I am planning to use a Click PLC and a C-More Micro similar as the used on the AN-SERV-009. Please explain how to program the servo drive if the encoder could be used. Ideas are welcome Thanks P.meza
Created Date: June 10,2009
Created by: pj.meza
Anybody with ideas?
Philip
Created Date: June 12,2009
Created by: jonesjeremya
Unfortunately, as you describe, you will not be able to connect an encoder to the servo drive. But I have some suggestions instead of an encoder for table position feedback.
If I understand you correctly, the servo is only to be used to move a conveyor belt 30 " of travel?
Is the conveyor belt move always 30 "?
Is the conveyor belt always moving in the same direction?
If it were me, I would just use proximity switches to indicate the three table positions.
a)0>260
b)261>360
c)180*neutral
Since you are always moving the conveyor 30 ", I would set the servo to Pr mode, and use the digital inputs from the breakout board to trigger the digital input that would cause the servo to move. And I would set the servo to increment mode, so each time the move signal goes high on a particular sureservo digital input, the servo moves the number of rotations/pulses set that equal 30 " of travel on your conveyor belt.
If you are set on using an encoder, you'll need to connect the encoder to the PLC (not a click) and use input pulses to determine the table position. If I am not mistaken, the CLICK cannot handle high speed input, i.e. encoder pluses at high frequency, but i'm not certain.
Check out chapter 5 of the sureservo manual, control modes and operation. The information and options are daunting, but it's all there.
What is the purpose of the Cmicro?
Jeremy
Created Date: June 15,2009
Created by: pj.meza
Thanks for your idea Jeremy,
The Cmore is use because the operator will change the distance, the conveyor will move mostly 30 ", but there are some products were the operator will have to change the distance.
I will use proximity switches with cams to check the position of the table.
Created Date: June 07,2009
Created by: pj.meza
Hi,
I have a system where it will be updated with a Servo System. The system is a rotational table that needs to be loaded with a conveyor.
The Servo motor will move the conveyor 30 inchs once the table is moving from 0 to 260 deg, stop and wait from 261 to 360 deg. The cycle will continue as long as the conveyor has product on it (Photoswitch will sense it).
If the conveyor does not have any product, the rotary table will stop between 180-190 deg.
The rotary table will be moved with a motor-Frequency Drive.
I know that I can use Proximity switches and cams to send signal from the table degree positions, however, i would like to use and Encoder instead, but I dont know if that is posible to connect it directly to the Servo Drive.
I am planning to use a Click PLC and a C-More Micro similar as the used on the AN-SERV-009.
Please explain how to program the servo drive if the encoder could be used.
Ideas are welcome
Thanks
P.meza