Pro Audio Asylum Pro studio recording equipment and music production/industry.

---

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Pro Audio Asylum ]

---

[ Alert Moderator ] [ Edit ] [ Delete ]

---

RE: Servo Drive Basstech 7 questions

76.238.50.157

Posted by servojohn on November 14, 2007 at 10:00:37

In Reply to: RE: Servo Drive Basstech 7 questions posted by ghaleon on November 13, 2007 at 16:36:01:

A "flapping" sound is likely a broken belt or cone. The squeaking or chirping noise at the rear of the cabinet could be a couple of things. First, the motor bearings may be dry or damaged, the armature of the motor is warped(this is a precision molded piece of magnet wire and epoxy, for very low moving mass)and squeaking as it rubs something inside the motor, or, more commonly in a properly working unit, just the brush noise as the motor changes direction with the input signal. Remember, technically this is a High Speed, Low Inertia DC servomotor, and has four brushes wired as two parallel pairs contacting the commutator.
Oh, there is one more thing that could be causing the noise at the back of the cabinet-there is a blower motor forcing outside air into the motor to cool it-driven from some of the input signal itself, so it is gauged to the amount of input power applied, and starts spinning slowly around 12-15volts rms input. The blower could have dry bushings and squeak. Lubricants can be used, but very conservatively in the main drive motor especially.

Best regards,

John

This post is made possible by the generous support of people like you and our sponsors:

Analog Engineering Associates

---

[ Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2024, Audio Asylum, all rights reserved ]

---

[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]

---