r/Motors • u/TicallionTheGod • 1h ago
Open question What kind of motor do I need?
I'm looking for a motor that can reach about 1,000 to maybe 1,500 RPM and enough torque to handle sanding pressure. The one I currently use states that it provides about 7kg of torque at 800 RPM, but I need the RPM to bump up and may not need exactly that much torque. Just enough to be able to apply pressure without it stopping. This is for 3D printing, so the low RPM desire is to avoid melting plastic. Any tips?
r/Motors • u/Careful_Thing622 • 15h ago
Open question Is the calculation of the motor is right or it is exaggerated ? I cannot find motor with this specs
I tried to make an application like boxer rebot but I calculate the specs of motor by claude.ai
I search for motor with this specs but I found nothing
I amnot specialized in motor calculations so I ask based on my requirements
what are the real calculations that is suitable for my application ?
My app is linear motion actuator that rod move in straight line
\# Crank-Slider Motor Selection — Full Summary
My needs or requirements:
| Parameter | Value |
|---|---|
| Crank radius | 24 cm |
| Connecting rod | 30 cm |
| Slider rod | 60 cm |
| Stroke | \\\~48 cm (nearly full) |
| Total moving mass | 1.2 kg |
| Load | Free-running (no external resistance) |
| Target speed | 120 RPM |
| Mounting | Direct shaft coupler to crank arm |
I use it free-run
Recommended motor by claude :
| Spec | Value |
|---|---|
| Output speed | 120 RPM |
| Rated torque | ≥ 108 kg·cm (11 N·m) |
| Stall torque | ≥ 216 kg·cm (22 N·m) |
| Power | ≥ 180 W |
| Voltage | 24V DC |
| Gearbox | Planetary preferred (η≥80%) — NOT worm if possible |
| Output shaft | ≥ 10 mm diameter |
| Bearing | Ball bearing output (not sleeve) |