A: For estimating purposes on the 751-OB-60-00-NL at approximately 5 bar / 73 psi, I would use
1/4 second per inch of travel as a general guideline.
Actual advance and return times can vary based on air pressure, marker position, valve flow, hose length, exhaust restriction, and the coefficient of friction in the slide assembly.
For a conservative overestimate, I would recommend using:
Advance time: 1.5 seconds maximumRetract time: 1.5 seconds maximum
In actual operation, I expect the unit to be under this estimate, but using 1.5 seconds each direction should give the controls team a safe upper-end value for cycle planning.
For programming the solenoid timing, allow the marker to complete the forward stroke and deliver the impact before switching to return. If the return signal is applied too quickly, it can reduce impact force by essentially braking or reversing the hammer before it fully transfers energy into the mark.
The high-speed camera will be very helpful during tuning. If the return signal is too early, you may see reduced impact force or inconsistent marking. If the advance signal is held too long, the unit may dwell longer than necessary and could increase the chance of secondary contact depending on tooling and part conditions.
I would recommend starting conservatively, then tuning the advance dwell downward during testing to find the shortest reliable timing that still produces full impact force without a double hit.
