Which handshake waits can I overlap with robot motion?

Requests that do not depend on the robot being in place, such as telling the machine to open its door while the robot approaches. Waits that confirm the robot's own action, such as a chuck clamping the part just placed, must stay.

How do I measure gripper actuation time?

Time it from the valve output switching on to the gripper sensor confirming, on a trace or the I/O log. That captures valve switching, hose filling, jaw stroke and sensor delay together.

Should settle time after a stop count as dwell?

Yes, when the robot stands still waiting for it. Put fixed settle waits in programmed dwell, but leave them out if your measured move times already include them.

What if dwell time already exceeds takt?

Then no path or speed change can meet takt: the waits must shrink or overlap motion. Start handshakes during moves, cut fixed waits, or share the work with a second robot.

Robotics & Automation calculator

Robot Dwell Time Calculator

Find how many seconds of each cycle the robot waits instead of moving, and which wait to cut first. You need gripper actuation counts and times, handshake waits from the I/O log, programmed dwells and takt.

What this calculator does

Seconds per cycle a robot stands still for gripper actions, I/O handshakes and programmed waits, and how much takt that leaves for motion.

Formula used

Gripper time = gripper actuations × time per actuation
Handshake wait time = I/O handshakes × average handshake wait
Dwell time = gripper time + handshake wait time + programmed dwell
Dwell share of takt = dwell time ÷ takt time × 100
Time left for motion = takt time − dwell time

Inputs explained

Gripper Actuations per Cycle: Each close and each open the robot waits on, including vacuum.
Time per Actuation: Valve switching, jaw stroke and sensor confirmation, timed on a trace.
I/O Handshakes per Cycle: Waits for an external signal: part present, machine ready, door open.
Average Handshake Wait: Mean wait per signal, from the robot's I/O log or a trace.
Programmed Dwell per Cycle: Fixed waits in the program: settle, blow-off and process dwells.
Takt Time: Available seconds divided by parts demanded, times parts per cycle.

How to use the result

Best suited to auditing a cell that misses takt, setting a motion budget before path programming, justifying faster valves or fieldbus I/O.
Averages hide slow outliers; check the longest waits in the I/O log for a worst-case cycle.

Current U.S. benchmarks

Global copper trades at $13,543 per tonne (IMF via FRED, Jul 2026), up 38.6% in a year, and U.S. industrial electricity averages 9.77 cents per kWh. Both feed electrified-hardware unit economics.

Common questions

Which handshake waits can I overlap with robot motion? Requests that do not depend on the robot being in place, such as telling the machine to open its door while the robot approaches. Waits that confirm the robot's own action, such as a chuck clamping the part just placed, must stay.
How do I measure gripper actuation time? Time it from the valve output switching on to the gripper sensor confirming, on a trace or the I/O log. That captures valve switching, hose filling, jaw stroke and sensor delay together.
Should settle time after a stop count as dwell? Yes, when the robot stands still waiting for it. Put fixed settle waits in programmed dwell, but leave them out if your measured move times already include them.
What if dwell time already exceeds takt? Then no path or speed change can meet takt: the waits must shrink or overlap motion. Start handshakes during moves, cut fixed waits, or share the work with a second robot.

Last reviewed 2026-10-01.