- Jan 4, 2001
- 41,596
- 20
- 81
This isn't "General" and it's not "Highly Technical."
So here it is.
I'm trying to do some work on some ancient servomotors, from sometime in the late 80's.
I can't find any specsheets for them online, probably because they existed before a computer could render a PDF file in less than a minute.
Each motor has a total of 7 wires coming from it:
1) +5DVC for the motor
2) GND for the motor
3) +5VDC for the circuitry
4) GND for the circuitry
5) Yellow (CCH)
6) Blue (ACH)
7) Green (BCH)
Other) There are 3 other black wires coming from the circuitboard, but they've been snipped off, and are therefore unconnected at the other end. There is no mention of them on the simple wiring table labeled on the outside of the circuit casing.
The latter 3 wires are all labeled "OUT" on the wiring table, with nothing labeled "in."
I went ahead anyway and built a simple 555 circuit to attempt to drive the servo, but it refuses to change speed when attaching the signal wire to any of wires 5, 6, or 7.
I have a "Curve Tracer HM6042" which does indicate that the 555 circuit is indeed outputting a signal, but it might be going to deaf ears, as it's only attached to "out" wires.
It just barely picks up a waver of something coming from the green and blue wires, but it's also apparently not a full-featured, genuine oscilloscope. I've heard rumors that there is a real oscilloscope on the site, but the only guy here who'd know where it is stored is not here today. I also don't know enough about electronics to build a simple signal amplifier.
I'm wondering if these servos output a signal to the controller board, which then adjusts the voltage and polarity of the main motor inputs in order to change the motor's speed and direction.
Rubycon already kindly pointed me to this infosheet, but it hasn't really helped me to be able to drive these servos.
Servos in question:
2x Matsushita 57AE-10FNNA
2x National (division ot Matsushita) Type TS N104E6
1x Tamagawa Type TS N104E5
Would an oscilloscope be all I'd need for basic diagnostics on these servos?
I realize that servo repair is apparently something which you'd normally ship out to some external company, but I don't have that luxury. I've got to be the resident "robot expert" here.
Any other hints or tips anyone might be able to add on servomotors could be helpful.
For instance, a servo amplifier somehow fits into all this, but I have no idea how. I just know that they're complex, bulky, and expensive.
Correction: I have an oscilloscope. I don't know if it works, and I don't know how to use it. It weighs about a metric ton. Tektronix 454A.
So here it is.
I'm trying to do some work on some ancient servomotors, from sometime in the late 80's.
I can't find any specsheets for them online, probably because they existed before a computer could render a PDF file in less than a minute.
Each motor has a total of 7 wires coming from it:
1) +5DVC for the motor
2) GND for the motor
3) +5VDC for the circuitry
4) GND for the circuitry
5) Yellow (CCH)
6) Blue (ACH)
7) Green (BCH)
Other) There are 3 other black wires coming from the circuitboard, but they've been snipped off, and are therefore unconnected at the other end. There is no mention of them on the simple wiring table labeled on the outside of the circuit casing.
The latter 3 wires are all labeled "OUT" on the wiring table, with nothing labeled "in."
I went ahead anyway and built a simple 555 circuit to attempt to drive the servo, but it refuses to change speed when attaching the signal wire to any of wires 5, 6, or 7.
I have a "Curve Tracer HM6042" which does indicate that the 555 circuit is indeed outputting a signal, but it might be going to deaf ears, as it's only attached to "out" wires.
It just barely picks up a waver of something coming from the green and blue wires, but it's also apparently not a full-featured, genuine oscilloscope. I've heard rumors that there is a real oscilloscope on the site, but the only guy here who'd know where it is stored is not here today. I also don't know enough about electronics to build a simple signal amplifier.
I'm wondering if these servos output a signal to the controller board, which then adjusts the voltage and polarity of the main motor inputs in order to change the motor's speed and direction.
Rubycon already kindly pointed me to this infosheet, but it hasn't really helped me to be able to drive these servos.
Servos in question:
2x Matsushita 57AE-10FNNA
2x National (division ot Matsushita) Type TS N104E6
1x Tamagawa Type TS N104E5
Would an oscilloscope be all I'd need for basic diagnostics on these servos?
I realize that servo repair is apparently something which you'd normally ship out to some external company, but I don't have that luxury. I've got to be the resident "robot expert" here.
Any other hints or tips anyone might be able to add on servomotors could be helpful.
For instance, a servo amplifier somehow fits into all this, but I have no idea how. I just know that they're complex, bulky, and expensive.
Correction: I have an oscilloscope. I don't know if it works, and I don't know how to use it. It weighs about a metric ton. Tektronix 454A.
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