As description says, motor locks up. Cables fine etc etc... From experience, driver or motor?
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"You can't trust your eyes, if your mind is out of focus" --
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Re: AR-507 Mirror Unit, Stepper or Driver?
Just an Update, the motor works to return the unit, but not to drive it. I won't replace the PWB, too expensive to replace entire board for 9 dollar chip. I just wanted an opinion of which is more likely from the repair tech's experience before I cracked out my oscilloscope as well as cracked open my stale stuff wallet :P. This unit appears to have the updated driver and motor, 3 phase motor with new mount.
Out of sake of curiosity what was causing these drivers to blow out? My 405 never blew a driver, seems sharp should have stuck with what worked...
Thanks very much for your advice. If money was to come around I would probably replace both, then I would have a new machine...Comment
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Re: AR-507 Mirror Unit, Stepper or Driver?
Been down this road many times. Replace both or its just going to cost you more in the long run. Also a side note check the pullys on the optics. As this model is very old they tend to have the bearings fall out and bind causing the motor to burn out.Comment
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Re: AR-507 Mirror Unit, Stepper or Driver?
Like I said the cables are fine (this includes the pulleys). The first thing I suspected was the cable system due to bearing failure in my 405, plastic bearing carrier, really... well these ones move like butter, they're straight.
what i'm going to do is just replace the h-bridge (just as good as replacing the driver pwb) on the driver board as well as check the logic of the sequencer. i might also pop open the stepper and check the windings. if money does not need to be spent then i'm not going to spend it. steppers are too expensive.
so i guess we all agree that it's the driver, good... that's only a 3 dollar repair
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Re: AR-507 Mirror Unit, Stepper or Driver?
Yea I'll replace the h-bridge and replace the stepper. I don't want to risk anything. Sure 3 bucks a piece, but the downtime from ordering a replacement motor in the future cannot be allowed. Thanks for your opinions.Comment
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Re: AR-507 Mirror Unit, Stepper or Driver?
Most of us don't spend the time it takes to troubelshoot and repair pwb's too much other stuff to do. I haven't seen one of these in years but I use to replace them in a set.Comment
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Re: AR-507 Mirror Unit, Stepper or Driver?
I never expected career repair techs to do board level repairs. You're right, the more jobs you can do each day the more money you can take home. It is no different than being a mechanic or an electrician. I'm not a career repair tech, so I have the time. I repair things as a hobby and to make spare change to repair other things that I collect.
I will replace the motor and repair the driver.
ThanksComment
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Re: AR-507 Mirror Unit, Stepper or Driver?
Note that there are two different variations in the scanner motor, and two variations with the driver PWB. IIRC the original motor was two phase (plastic flywheel), and the update three phase (brass flywheel or none). If you update the motor and PWB there is a simulation to change to accommodate the three phase motor.
From my own experience, there is no great benefit to updating to the three phase system. Both fail within basically the same time period. I can track down the bulletin if you need it. Keep in mind that this is an obsolete platform, so at some point you're not going to be able to get some key part. =^..^=If you'd like a serious answer to your request:
1) demonstrate that you've read the manual
2) demonstrate that you made some attempt to fix it.
3) if you're going to ask about jams include the jam code.
4) if you're going to ask about an error code include the error code.
5) You are the person onsite. Only you can make observations.
blackcat: Master Of The Obvious =^..^=Comment
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Re: AR-507 Mirror Unit, Stepper or Driver?
Thanks, but I beat you to it :P I found the tech bulletin online, change was in 2001. This machine has manufacture date of 2002, and thus already had the 3 phase motor installed.
I lucked out too because the 3 phase motor is cheaper than the 2 phase *wipes sweat from forehead*. Yea this is quite an old unit, but I got it for free and it is in great shape (aside from this stepper motor). Has only 300k on the meter and recently had the drum and developer replaced as well as the Mylar on the RSPF, thought it would be a nice upgrade from my ugly AR-405.
I ordered 3x replacement components found on the driver pwb. This ways I'm covered for many years. I just have to worry about the stepper motor replacements.Comment
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Re: AR-507 Mirror Unit, Stepper or Driver?
Kudos! =^..^=If you'd like a serious answer to your request:
1) demonstrate that you've read the manual
2) demonstrate that you made some attempt to fix it.
3) if you're going to ask about jams include the jam code.
4) if you're going to ask about an error code include the error code.
5) You are the person onsite. Only you can make observations.
blackcat: Master Of The Obvious =^..^=Comment
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Re: AR-507 Mirror Unit, Stepper or Driver?
Well, let me know if you need toner for that dinosaur because I have one on the shelf I'm about to throw away. Pay the freight and it's yours.Comment
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Re: AR-507 Mirror Unit, Stepper or Driver?
The 3-phase 'new style' system sucks. The 2-phase brass flywheel system was more reliable IMO, we used to scavenge them off old units prior to recycling (board, harness and motor). Make sure the rails are clean that the scanner slides on.Comment
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