Re: AR-507 Mirror Unit, Stepper or Driver?
The 3 phase system is actually better because it is more precise. It is precise by enabling you to microstep more, so more pulses. They also provide better torque and speed. Obviously the 2 phase worked fine. I honestly would have stuck with what was working the entire time. The motor is not what actually would fail as it is just windings... The only reason I think the 3 phase seems to break down more is because the flip flop that Sharp used is not very reliable. The driver is decent, but the flip flop is terrible and there is no datasheet. The old two phase had the flip flop built into the driver chip and then they had a hex inverter (buffer) chip that was separate. I agree though, the 3 phase does suck, but the motor is not the issue. The driver PWB is the issue, more specifically an 8 dollar chip. Stepper motors are actually very durable electronically, but just do not drop them.
Noted, I was checking the rails and they will need a little lube soon. Usually all machines I get that I refurbish I end up cleaning the rails and putting new lube on them. I used to use white lithium but I might move to PTFE. I've read a few people use WD40, but I wouldn't because it is a solvent and will clean any old grease off and then evaporate. But that's just from my use of lube fixing automobiles and restoring cars, as far as copiers are concerned I keep lithium grease away from gears because the back of these machines get hot and the grease flings all over. Little PTFE goes a long way
I checked the pulleys, they have all been replaced. The cables have good tension but are not too tight. The mirror unit is perfect as far as visual alignment is concerned. I'm just waiting on the new flip flop and driver, then this puppy will be back in the saddle, after I get a new hard drive (8 bucks...).
The 3 phase system is actually better because it is more precise. It is precise by enabling you to microstep more, so more pulses. They also provide better torque and speed. Obviously the 2 phase worked fine. I honestly would have stuck with what was working the entire time. The motor is not what actually would fail as it is just windings... The only reason I think the 3 phase seems to break down more is because the flip flop that Sharp used is not very reliable. The driver is decent, but the flip flop is terrible and there is no datasheet. The old two phase had the flip flop built into the driver chip and then they had a hex inverter (buffer) chip that was separate. I agree though, the 3 phase does suck, but the motor is not the issue. The driver PWB is the issue, more specifically an 8 dollar chip. Stepper motors are actually very durable electronically, but just do not drop them.
Noted, I was checking the rails and they will need a little lube soon. Usually all machines I get that I refurbish I end up cleaning the rails and putting new lube on them. I used to use white lithium but I might move to PTFE. I've read a few people use WD40, but I wouldn't because it is a solvent and will clean any old grease off and then evaporate. But that's just from my use of lube fixing automobiles and restoring cars, as far as copiers are concerned I keep lithium grease away from gears because the back of these machines get hot and the grease flings all over. Little PTFE goes a long way
I checked the pulleys, they have all been replaced. The cables have good tension but are not too tight. The mirror unit is perfect as far as visual alignment is concerned. I'm just waiting on the new flip flop and driver, then this puppy will be back in the saddle, after I get a new hard drive (8 bucks...).
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