Gear & Elepa
Elepa
Gear, I’ve plotted the torque‑speed curve of your latest gearbox in a spreadsheet and found a consistent dip at 250 rpm—want to see the numbers so we can tweak it?
Gear
Sure thing, just drop the spreadsheet data here. That dip at 250 rpm is probably a gear mesh issue or a backlash quirk—let’s see the numbers and tweak the tooth profile or add a little damping. I'll bring the calculation kit out.
Elepa
RPM Torque (Nm) Efficiency (%)
190 12.3 92.1
200 13.7 91.8
210 14.5 91.5
220 15.2 91.0
230 15.8 90.6
240 16.1 90.3
250 15.9 90.0
260 15.4 90.2
270 14.8 90.7
280 14.0 91.2
290 13.1 91.7
300 12.0 92.0
Gear
Hmm, that dip at 250 rpm lines up right before the torque starts to fall off—looks like a mesh resonance or maybe a slight backlash increase at that speed. I’d start by checking the tooth profile at the gear pair that hits that region; a slight chamfer or an adjustment to the pitch could smooth it out. Also, try adding a small amount of fluid damping in the bearing at that speed range—it often helps flatten those curves. Give me the gear drawings and I’ll run a quick finite‑element check.