Steve Wiebe
Member
- Join Date
- Jul 2002
- Posts
- 68
I have a gang edger for sawing up cants. The cants need to stay up against a line bar in order to be cut properly. There is a roll on a hydraulic cylinder pressing against the side of the cant for this. The roll is currently controlled by giving it a target position slightly less than the width of the cant.
There are problems with this:
- tapered cants don't get pressed at all (extra programming would help with this)
- small cants can be bent out of shape
- cants can get pressed against the line bar so hard that they stop traveling
I would like to try using force, not position, to control this roll when it is pressing against a cant (position mode between cants). I'm thinking of doing this by adding a pressure sensor to each end of the hydraulic cylinder and then regulate position based on the pressure difference to regulate force.
My gut instinct is that this will not work with beans. The system will be too slow and imprecise. What I would like to use is an RMC101 controller from Delta Computer Systems but money is very tight right now. I'm looking for ideas and feedback I could take to my bosses. Any help is greatly appreciated.
PLC is an A-B PLC-5 with a 1771-QB module controlling the roll.
Feed speed is ~400 Feet per minute.
Thanks,
Steve.
There are problems with this:
- tapered cants don't get pressed at all (extra programming would help with this)
- small cants can be bent out of shape
- cants can get pressed against the line bar so hard that they stop traveling
I would like to try using force, not position, to control this roll when it is pressing against a cant (position mode between cants). I'm thinking of doing this by adding a pressure sensor to each end of the hydraulic cylinder and then regulate position based on the pressure difference to regulate force.
My gut instinct is that this will not work with beans. The system will be too slow and imprecise. What I would like to use is an RMC101 controller from Delta Computer Systems but money is very tight right now. I'm looking for ideas and feedback I could take to my bosses. Any help is greatly appreciated.
PLC is an A-B PLC-5 with a 1771-QB module controlling the roll.
Feed speed is ~400 Feet per minute.
Thanks,
Steve.