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ghid

Syncronization of two hydraulic cyliders

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Hello, I need to make an aplication where I have to command two hydraulic cylinders in syncron. The difference between the cylinder actuation must be within 10mm. What I have: A TWIDO PLC - two proportional valves commanded in 0 - 10V for cylinder actuation - two push-pull encoders, 3600 resolution per each cylinder linear course. Please get me a start to get from. Thank you in advance.

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Don't know anything about a Twedo, but you may want to look into two PID loops whos outputs go into a third PID loop that drives both proportioanl valves? Of course that would mean that all mechanical and hydraulic parts of each cylander are nearly identical, and stay that way. Or better yet get two hydraulic servo valves that can be setup as master and follower.

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If you have any budget to purchase something else, I highly recommend this: http://www.deltamotion.com/products/motion/rmc150/ It was super easy to electronically gear three hydraulic cylinders I did for an application a few years back.

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Let me add my voice to using a delta motion controller as well. However, for just two axes the RMC 70 may be a more economical approach. http://www.deltamotion.com/products/motion/rmc70/ I've been using these for several years now and they are super easy to set up and program. We synchronize six axis to better than .01 mm.
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Another vote for the RMC70. It is the only way to go in my opinion. http://www.deltamotion.com/products/motion/rmc70/

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I'm actually doing a similar application, and I'm familiar with the RMC. Currently, for us, it's a toss up between RMC150, 1756-M02AS (Control Logix), or a new device called the Bosch IAC (Integrated Axis Controller) valve. It has all the motion control functionality built right in to the servo valve, and I just communicate using Ethernet/IP. I think it's a pretty interesting device. Has anyone used it before?

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