Motor Scaling Calculator
Motor Scaling
Section titled “Motor Scaling”Choosing a motor for a ballscrew-driven motion system requires matching the motor’s rated RPM, continuous torque, and power against what the screw geometry actually demands. A drive ratio (belt/pulley or gearbox) can multiply torque at the cost of speed, so the optimal ratio is different for every motor.
This calculator takes your axial speed and force requirements, applies a safety margin, and scores every motor in the database across RPM, torque, and power headroom. It also computes the optimal drive ratio per motor (or lets you fix it manually) and flags inertia mismatch.
How to use
Section titled “How to use”- Requirements — Enter the peak axial speed (mm/s) and axial force (N) your axis must deliver. Set a safety factor to add margin on top. Leave Auto Drive Ratio on to let the calculator find the best ratio per motor, or fix a ratio manually.
- Ballscrew — Select your ballscrew standard size (e.g. 1610 = 16 mm diameter, 10 mm pitch) or choose Custom to enter pitch and diameter directly. Adjust efficiency if you know the actual ballscrew efficiency.
- Load Inertia — Enter the screw length and the mass being moved. These are used to compute screw and load inertia for the inertia ratio column.
- Calculated — Shows the derived screw-shaft requirements (RPM, torque, power) at drive ratio 1:1 with safety applied. Use these as a sanity check.
- Results table — Motors are sorted by status (Pass → Warn → Fail) then by torque headroom. The coloured bars show rated vs required for RPM, torque, and power; the percentage is the margin above the requirement. The inertia column flags ratios above 10:1 in amber.
- Custom motors — Click + Add custom motor at the bottom of the table to add a motor not in the database. Custom motors are saved in browser localStorage.
Calculator
Section titled “Calculator”| Motor | Status | Ratio | RPM | Torque | Power | Inertia | Peak Torque | |
|---|---|---|---|---|---|---|---|---|
| OMC DSY80-1000L2A2M17S (1000W DC servo) | ✓ Pass | 1.05:1 | +98% | +98% | +291% | 0.0:1 | 9.60 Nm | |
| OMC DSY80-1000L2B2M17S (1000W DC servo, brake) | ✓ Pass | 1.05:1 | +98% | +98% | +291% | 0.0:1 | 9.60 Nm | |
| OMC T6M80-1000H2A3-M17S (1000W, 17-bit) | ✓ Pass | 1.05:1 | +98% | +98% | +291% | 0.0:1 | 9.56 Nm | |
| OMC T6M80-1000H2B3-M17S (1000W, 17-bit, brake) | ✓ Pass | 1.05:1 | +98% | +98% | +291% | 0.0:1 | 9.56 Nm | |
| JMC iHSS86 (1000W) | ✓ Pass | 1.05:1 | +98% | +98% | +291% | 0.1:1 | 9.54 Nm | |
| Leadshine EL5-D1022 (1kW) | ✓ Pass | 1.05:1 | +98% | +98% | +291% | 0.0:1 | 9.54 Nm | |
| OMC A6M80-1000H2A1-M17 (1000W) | ✓ Pass | 1.05:1 | +98% | +98% | +291% | 0.0:1 | 11.13 Nm | |
| OMC A6M80-1000H2B1-M17 (1000W, brake) | ✓ Pass | 1.05:1 | +98% | +98% | +291% | 0.0:1 | 11.13 Nm | |
| OMC T6M80-1000H2A1-M23 (1000W, 23-bit) | ✓ Pass | 1.05:1 | +98% | +98% | +291% | 0.0:1 | 9.54 Nm | |
| OMC T6M80-1000H2B1-M23 (1000W, 23-bit, brake) | ✓ Pass | 1.05:1 | +98% | +98% | +291% | 0.0:1 | 9.54 Nm | |
| OMC T7M80-1000H2A1-M23 (1000W) | ✓ Pass | 1.05:1 | +98% | +98% | +291% | 0.0:1 | 9.54 Nm | |
| OMC T7M80-1000H2B1-M23 (1000W, brake) | ✓ Pass | 1.05:1 | +98% | +98% | +291% | 0.0:1 | 9.54 Nm | |
| JMC iHSS86 (750W) | ✓ Pass | 1.22:1 | +71% | +71% | +193% | 0.1:1 | 7.17 Nm | |
| Leadshine EL5-D507 (750W) | ✓ Pass | 1.22:1 | +71% | +71% | +193% | 0.1:1 | 7.17 Nm | |
| OMC A6M80-750H2A1-M17 (750W) | ✓ Pass | 1.22:1 | +71% | +71% | +193% | 0.0:1 | 8.36 Nm | |
| OMC A6M80-750H2B1-M17 (750W, brake) | ✓ Pass | 1.22:1 | +71% | +71% | +193% | 0.0:1 | 8.36 Nm | |
| OMC E6M80-750H2A2-M17S (750W) | ✓ Pass | 1.22:1 | +71% | +71% | +193% | 0.0:1 | 7.17 Nm | |
| OMC T6M80-750H2A3-M17S (750W, 17-bit) | ✓ Pass | 1.22:1 | +71% | +71% | +193% | 0.0:1 | 7.17 Nm | |
| OMC T6M80-750H2B3-M17S (750W, 17-bit, brake) | ✓ Pass | 1.22:1 | +71% | +71% | +193% | 0.0:1 | 7.17 Nm | |
| OMC T6M80-750H2A1-M23 (750W, 23-bit) | ✓ Pass | 1.22:1 | +71% | +71% | +193% | 0.0:1 | 7.17 Nm | |
| OMC T6M80-750H2B1-M23 (750W, 23-bit, brake) | ✓ Pass | 1.22:1 | +71% | +71% | +193% | 0.0:1 | 7.17 Nm | |
| OMC T7M80-750H2A1-M23 (750W) | ✓ Pass | 1.22:1 | +71% | +71% | +193% | 0.0:1 | 7.17 Nm | |
| OMC DSY80-750L2A2M17S (750W DC servo) | ✓ Pass | 1.22:1 | +71% | +71% | +193% | 0.0:1 | 7.17 Nm | |
| OMC DSY80-750L2B2M17S (750W DC servo, brake) | ✓ Pass | 1.22:1 | +71% | +71% | +193% | 0.0:1 | 7.17 Nm | |
| JMC iHSS57 (400W) | ✓ Pass | 1.67:1 | +25% | +25% | +56% | 0.1:1 | 3.81 Nm | |
| OMC A6M60-400H2A1-M17 (400W) | ✓ Pass | 1.67:1 | +25% | +25% | +56% | 0.0:1 | 4.45 Nm | |
| OMC A6M60-400H2B1-M17 (400W, brake) | ✓ Pass | 1.67:1 | +25% | +25% | +56% | 0.0:1 | 4.45 Nm | |
| OMC E6M60-400H2A2-M17S (400W) | ✓ Pass | 1.67:1 | +25% | +25% | +56% | 0.0:1 | 3.81 Nm | |
| OMC T6M60-400H2A3-M17S (400W, 17-bit) | ✓ Pass | 1.67:1 | +25% | +25% | +56% | 0.0:1 | 3.81 Nm | |
| OMC T6M60-400H2B3-M17S (400W, 17-bit, brake) | ✓ Pass | 1.67:1 | +25% | +25% | +56% | 0.0:1 | 3.81 Nm | |
| OMC T6M60-400H2A1-M23 (400W, 23-bit) | ✓ Pass | 1.67:1 | +25% | +25% | +56% | 0.0:1 | 3.81 Nm | |
| OMC T6M60-400H2B1-M23 (400W, 23-bit, brake) | ✓ Pass | 1.67:1 | +25% | +25% | +56% | 0.0:1 | 3.81 Nm | |
| OMC T7M60-400H2A1-M23 (400W) | ✓ Pass | 1.67:1 | +25% | +25% | +56% | 0.0:1 | 3.81 Nm | |
| OMC DSY60-400L2A2M17S (400W DC servo) | ✓ Pass | 1.67:1 | +25% | +25% | +56% | 0.1:1 | 3.81 Nm | |
| OMC DSY60-400L2B2M17S (400W DC servo, brake) | ✓ Pass | 1.67:1 | +25% | +25% | +56% | 0.0:1 | 3.81 Nm | |
| Lichuan LC57H280 (280W) | ⚠ Warn | 1.98:1 | +5% | +5% | +9% | 0.1:1 | 2.70 Nm | |
| NEMA 34 Stepper (12Nm) | ✗ Fail | 0.50:1 | -44% | +136% | +31% | 0.1:1 | 12.00 Nm | |
| JMC iHSS57 (200W) | ✗ Fail | 2.35:1 | -11% | -11% | -22% | 0.1:1 | 1.92 Nm | |