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Tag Archives: servo

Monster torque servos

Tuesday, August 17, 2010

Gone is the HiTec light-blue box, and replaced with a clear one. These servos, which HiTec calls "monster torque" are designed for either 6.0V or a LiPo pack at 7.4V. They are about 10% bigger than the standard 20x40 mm footprint, and produce 36 kg*cm (6.0V) or 44 kg*cm (7.4V) of torque. To be tried [...]

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Wires, wires, wires…

Tuesday, February 2, 2010

Number of wires from servo-motor to controller on my lathe build: 19. 1: Motor power U 2: Motor power V 3: Motor power W 4: Hall sensor +5V 5: Hall sensor U 6: Hall sensor V 7: Hall sensor W 8: Hall sensor GND 9: Encoder +5V 10: Encoder A 11: Encoder B 12: Encoder [...]

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Spindle servo encoder shaft

Sunday, November 29, 2009

The 1.75kW spindle-servo for the lathe only has resolver and hall-feedback. So I need to mount an incremental encoder with index pulse on it myself. The rotor for the hall-sensors attaches to the main motor shaft with an M6 bolt. Here I'm making my own M6 bolt with a long 'head'/shaft that will extend outside [...]

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Spindle servo Hall-signals

Tuesday, November 24, 2009

Figured out the hall- and resolver-signals on the spindle servo today. There are two scope-pictures but the hall signal corresponding to the third phase is also OK, I just didn't save the screenshot. The pinout seems to be: 1: resolver a+ 2: resolver a- 3: resolver b+ 4: resolver b- 5: resolver c+ 6: resolver [...]

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Lathe spindle servo

Monday, November 23, 2009

A closer look at the spindle-servo today. Googling for the model number does not immediately yield a datasheet, although I found a few similar-ish model numbers. The high-power connector is simple with U, V, W phases, Protective Earth, and +/- terminals for the solenoid brake. The brake opens at 24V and 0.67 A. The back [...]

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