(Topic ID: 96521)

Tech Help Please: Scared Stiff

By JKirby

5 years ago

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  • 18 posts
  • 6 Pinsiders participating
  • Latest reply 4 years ago by zaza
  • Topic is favorited by 2 Pinsiders


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#1 5 years ago

Good Afternoon Everyone,

Working on my Scared Stiff - the spider motor won't spin. There are no schematics in the manual, so I'm hoping someone here can point me in the right direction.

What I know: The LED is lit, I'm assuming this means voltage. When I attempt the spider test it seems like the motor is trying to spin. I can hear it humming, and when I put the actual plastic pointer on it the pointer shakes as if it's trying to move. Please note that is a new motor. I took the cover off and the lubricant on there is still viscous and not dirty.

What can I look for to try to resolve this? Any help would be much appreciated.


#4 5 years ago

Measure voltage at both sets of wires (4 wires, 2 & 2 without a schematic I'm assuming they're paired). I get 6.9V DC at both pairs, when I run the motor test, 1 set drops to 0v, the other stays constant at 6.9V

Is that a strange voltage? I figured it would be 12V

#6 5 years ago

I have 14v at gray/yellow, 9.7v at Green/brown & 10.7 at Tan/red - the connector coming from the backbox to the stepper board. Measurements taken on the pins of the stepper board connector while not plugged into the board.

#8 5 years ago

Sorry, I just went across the connector and measured what voltages I had. Yellow/White has continuity with the J110-4 as does the Green/White at J110-5. Measuring these two wires for voltages yields a reading of 0v.

#12 5 years ago

All of the diodes check out (tested in circuit), only one that's possibly off if D10 - measures 664. Most all of the resistors are within tolerance, except the 100K, that reading is at about 60K.

Anything else I should check for? I've reflowed solder on the input connector.

Thank you for all the help so far everyone.

1 week later
#14 5 years ago

Well, the problem is resolved. Ended up being the 5 pin molex connector in the back box. Replaced the housings and repinned all the wires and now it works like a charm. Some testing with alligator clips & my meter helped me isolate this.

Thanks to everyone that helped. There are a lot of really smart people that post on here.


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