Possible to Adjust Speed

[Ted Weisse]

You can do this by using multiple Directional Controls (DC) and multiple Flow Controls (FC). To obtain three different speeds you could use two DCs and three FCs. Remember to only flow control the out flow of the cylinder and not the in flow. Connect the cylinder port to the "P" of DC1 (DC1-P) and FC1 to DC1-A. Connect DC1-B to DC2-P, then FC2 to DC2-A and FC3 to DC2-B. With this arrangement whenever DC1 is de-energized FC1's setting will be used and therefore that speed. With DC1 energized and DC2 de-energized you will get the speed based on FC2's flow setting and thus with both DC1 and DC2 energized you will obtain FC3's setting.

This is fairly easy to program since the DCs are basic binary on and off devices.

If you need more speed settings just add more DCs and FCs in the same "logic". You will have one less DC than FC's. If you wanted say 6 different speeds you could do it with 5 DCs and 6 FCs.

ted yz