Use this section to estimate conveyor speed, size motors, check servo torque, evaluate gear ratios, and confirm gearbox output for practical motion system design and troubleshooting.
This is built for real automation work — conveyors, axes, servo applications, drive sizing, and motion troubleshooting.
Use the path that matches the problem instead of guessing which motion calculator fits.
Start here when the line speed, belt speed, roller speed, or throughput does not match what you need.
Go here when the conveyor struggles to start, stalls, overheats, trips the drive, or does not feel like it has enough torque or power.
Use this when you need to estimate motion torque, choose a ratio, or check gearbox output against the actual load.
These paths help people move through the motion section logically instead of bouncing between unrelated tools.
Use this when the real job is turning speed requirements into motor sizing decisions.
Use this when you need to estimate torque first, then work the gearing and output side.
Motion problems usually show up as speed errors, torque shortage, drive trips, poor acceleration, unstable movement, gearbox mismatch, or inconsistent conveyor flow. The fastest way to troubleshoot is to separate speed, torque, inertia, gearing, load, and control behavior.
If the line is too slow or too fast, start with the actual pulley, roller, drive speed, and required throughput. A motor may be fine while the chosen ratio or roller size creates the wrong belt speed.
A motor that moves empty but struggles under load may be undersized, geared incorrectly, overloaded by friction, limited by drive settings, or fighting a mechanical problem such as belt tension, binding, or bad bearings.
Servo torque problems often show up during acceleration, not steady running. Check acceleration torque, reflected inertia, load torque, ratio, payload, friction, and whether the move profile is too aggressive.
Output torque alone does not prove the system will work. The load may have high starting friction, shock load, low efficiency, poor alignment, gearbox service factor issues, or a duty cycle the gearbox cannot support.
Overheating and drive trips may come from overload, high acceleration, low speed cooling limits, incorrect motor data, bad bearings, jammed load, incorrect VFD settings, repeated starts, or poor duty cycle assumptions.
Inconsistent motion can be caused by backlash, poor tuning, loose couplings, worn belts, encoder issues, ratio mismatch, unstable load, mechanical slip, or a move profile that does not match the mechanics.
A motion problem is not always a motor problem. The motor is where the symptom appears, but the real cause may be gearing, inertia, friction, acceleration, mechanical alignment, control tuning, or incorrect speed assumptions.
A motor may be correctly sized for the expected load but overloaded by real-world friction, jams, belt tension, product buildup, misalignment, or worn mechanical components. Always compare calculated load to actual machine behavior.
Many systems run fine once moving but fail during acceleration. Servo axes, indexing conveyors, turntables, and fast starts need acceleration torque checked, not only steady-state torque.
Ratio changes both speed and torque. A ratio that fixes speed may create poor acceleration, low output torque, low motor RPM, poor efficiency, or a reflected inertia problem.
Horsepower or kilowatts are not the whole story. Starting torque, duty cycle, service factor, speed range, gearbox efficiency, thermal limits, and drive settings can decide whether the system works.
Gearboxes, belts, chains, screws, bearings, and couplings all create losses. If efficiency is ignored, the calculated output torque can look better than what the machine actually sees.
Poor tuning, bad move profiles, incorrect ramp times, torque limits, speed limits, and drive parameters can make a good motor and gearbox look wrong.
Increasing motor size is not always the right fix. A bigger motor can hide the symptom while leaving the real problem in the mechanics, gearing, controls, or application assumptions.
Binding, bent shafts, overtight belts, bad bearings, damaged rollers, misaligned guides, or side-loaded mechanisms can create torque demand no sizing calculator predicted.
The wrong ratio can force the motor into a poor speed range, reduce available output torque, or create acceleration problems. Ratio should be checked with both speed and torque in mind.
Current limits, torque limits, acceleration ramps, motor data, braking settings, encoder setup, and overload settings can all limit performance even when the hardware is capable.
A conveyor speed calculation can be right while the production rate is still wrong if spacing, accumulation, transfers, stops, indexing time, or operator interaction were ignored.
Applications with impact, repeated starts, stop-start duty, high inertia, or reversing loads may need a different service factor than a smooth steady conveyor.
A conveyor or axis may seem slow because of dwell time, sensor delay, PLC logic, robot wait states, reject timing, or safety interlocks — not motor capacity.
Use these checks when you need to decide which direction to troubleshoot first.
Start with conveyor speed, pulley size, roller diameter, motor RPM, gearbox ratio, and drive frequency. This is usually a speed translation issue, not a motor sizing issue.
Focus on load torque, friction, incline, acceleration, duty cycle, gearbox efficiency, and mechanical condition. This is where motor sizing and gearbox torque checks matter.
Check acceleration torque, reflected inertia, move profile, torque limits, ratio, and whether the axis is being asked to accelerate too much mass too quickly.
Check service factor, shock load, real gearbox efficiency, output speed, coupling slip, bearing condition, mechanical binding, and whether the load is higher than expected.
These are the current motion pages in the section. Together, they cover line speed, motor sizing, servo torque, gearing, and gearbox output checks.
Estimate belt or conveyor speed based on roller, pulley, or drive inputs when the real question is throughput or line speed.
Open calculator →Estimate motor power and torque requirements for conveyor applications when the drive feels weak, overloaded, or undersized.
Open calculator →Estimate required servo torque for acceleration and load conditions in motion-axis applications.
Open calculator →Estimate the ratio needed to translate speed and torque between the motor and the load.
Open calculator →Check gearbox output torque against the driven load once ratio and upstream torque are known.
Open calculator →Use the problem solver when the user knows the symptom but not which speed, motor, or motion page fits yet.
Open problem solver →Use the help page when the drive system is live, the application is machine-specific, or the sizing problem needs real review.
Request help →This section is built to help people solve real motion problems faster — not just calculate numbers with no context.
Most users know the symptom first: too slow, undersized, torque uncertain, or ratio unclear.
It helps turn speed requirements into motor, ratio, and gearbox decisions in a logical order.
Less obvious motion tools get surfaced instead of being buried in a long general calculator list.
Built for real conveyors, servo axes, and machine design support instead of generic textbook examples.
Motion calculators help you move faster, but some applications need live review of the conveyor, axis, inertia, load, gearing, or real machine behavior. If you need help on a real system, use the help page and describe what the machine is doing.