Help controlling a capstan motor salvaged from a panasonic VCR

?Nothing solid yet, but I would recommend getting a print for one of the VC Rs that use this motor.

ther eis one here :

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VCRs control these motors quite well and reverse them and all that so getti ng the print for any of the VCRs tyhat use that motor should give you the m ethoid of how to control it.

You could do it yourself from scratch if you want to reinvent the wheel, bu t do you ?

If so and you got good reason, say so. you could concievabvly connect to th e motor board and discard their inadequate chip. But why ? I know they had a way to report the phase back to the servo chip but never looked into it. they did this for slow tracking. Rmeember slow trackng ?

Anyway, get the print for any of those machines and you should be able to d o what you want to do. If not, say so...

VCRs that use this motor.

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ting the print for any of the VCRs tyhat use that motor should give you the methoid of how to control it.

but do you ?

the motor board and discard their inadequate chip. But why ? I know they ha d a way to report the phase back to the servo chip but never looked into it . they did this for slow tracking. Rmeember slow trackng ?

do what you want to do. If not, say so...

Thank you for the info. That list is very helpful and I could take it with me to a thrift store to look for one of those model, for sure. I'm unfamil iar with the term "the print" - is that another way to refer to the main pr inted circuit board?

I'll keep you all posted.

e VCRs that use this motor.

=New&page=3

etting the print for any of the VCRs tyhat use that motor should give you t he methoid of how to control it.

, but do you ?

o the motor board and discard their inadequate chip. But why ? I know they had a way to report the phase back to the servo chip but never looked into it. they did this for slow tracking. Rmeember slow trackng ?

to do what you want to do. If not, say so...

h me to a thrift store to look for one of those model, for sure. I'm unfam iliar with the term "the print" - is that another way to refer to the main printed circuit board?

I sounded out the pins:

S1 H4, IC20 (VCC) S2 IC18, 19 (N.C. VM) S3 H3 S4 H2 S5 IC9 (TL) S6 IC10 (EC) S7 IC 11 (ED/S) S8 IC 2, 3, 8, 12, 13 (SGND, N.C., MGND, CS,RNF)

With my notes on the pins:

1, PCV - 2, SGND - signal GND 3, N.C. - Not Connected 4, OSC - Oscillation 5, RCC - Ripple cancel 6, ECR - Output voltage control reference pin (between 2.0 and 2.4) 7, CNF - Capacitor connection pin for phase compensation 8, MGND - Motor GND 9, TL - Torque limit 10, EC - Output voltage control pin 11, ED/S - Rotation Direction Current detecting input terminal F: upto 2.2V , R: more than 2.8 12, CS - Current detecting input terminal 13, RNF - Resistance connection pin for output current detection. Torque li mit and I/O gain settings are made by the RNF resistance value 14, N.C. - Not Connected 15, A1 - coil output 16, A2 - coil output 17, A3 - coil output 18, N.C. - Not Connected 19, VM - Motor power supply pin 20, Vcc - Power supply pin 21, VH+ - Hall Power supply (in or out?, maybe Hall bias input pin)(between 2.45 and 2.85) 22, H3- - Hall signal input pin 23, H3+ - Hall signal input pin 24, H1- - Hall signal input pin 25, H1+ - Hall signal input pin 26, H2- - Hall signal input pin 27, H2+ - Hall signal input pin 28, PCI -

similar chip:

r/odd/ba6859afp-y-e.pdf

I don't 100% get what they all do, but I can power it up now and experiment .

I'll let you know if I get it working.