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help, I'm stuck

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Old April 26th, 2011, 05:36 PM   #1 (permalink)
dubiat dubiat is offline
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Default help, I'm stuck

Hi everyone.

I am really beginning to hate my Toyota 850. It only breaks down when I get a lot of work. As soon as I lose all the work, it gets fixed , then I have to start all over trying o get orders. as soon as I do, down it goes. I just rtecently posted on here about the x limit sensor being broken, and having a hard time finding one. I finally bought it at DataStitch for $50.00 ( a $2.00 part) Nobody makes anymore. It didn't solve the problem. My hoop still travels all the way to the left when I initialize and locks up the x motor. So I can't initialize the %^%$#%^**^&&%@!@%^&* machine. Anybody have any suggestions. I can't afford to pay a tech as my car transmission went bad and then the timing belt broke. so my cash flow is ZERO.
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Old April 27th, 2011, 11:40 AM   #2 (permalink)
dgeorge dgeorge is offline
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Default Re: help, I'm stuck

my friend,please do not blame me.
maybe is time to buy an Tajima machine

best regards
george dumitrescu
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Old April 27th, 2011, 02:17 PM   #3 (permalink)
dubiat dubiat is offline
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Default Re: help, I'm stuck

I'm not blaming anyone George. Just irritated with the machine. The price was due to supply and demand. But if anyone has any suggestions as to what else might be the problem, or how to fix it, I would love to hear them.

Thanks.

p.s. George, I believe that a while back when I had another sensor problem, you gave me a lot of help in trying to fix it. It was truly appreciated.
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Old April 27th, 2011, 02:53 PM   #4 (permalink)
DeepWoods DeepWoods is offline
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Default Re: help, I'm stuck

Is there a photo sensor like the needle change sensors or a reed switch or what for an actual limit switch or does it just use the hall effect sensor to determine where the table is from motor rotation? If it's a photo sensor, you should be able to test it to make sure it's reading the beam blocked by just using a piece of paper between the two eyes. I've never looked at any of that part of the machine when i've had the 850 or 860 apart to clean and grease them so I'm not familiar with how it actually works. Do you have a service manual for your machine? If so, I believe there are some troubleshooting procedures in it for X-Y problems.

Rob
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Old April 27th, 2011, 04:46 PM   #5 (permalink)
dubiat dubiat is offline
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Default Re: help, I'm stuck

it's two hall effect sensors. One was broken and replaced. tried the paper, didn't do anything.I talked to the tech at Datastitch today, and he told me that it may be the other sensor is also bad (scratched lens), the wiring harness may be bad, or the main motherboard has gone bad. To test, he suggested putting the sensor assembly on another 850 or 860 to see if it had the same problem. If with my sensor assembly on their machine, the problem was gone, then it would tell me that my main board was bad. If they had the same problem with my sensor assembly on their machine, then it would be the sensor. Unfortunately, I don't have a service manual, just the parts catalog and the user manual. UNfortunately, I don't have another machine to play with, or know anyone local that has one I could switch parts with.

I had the tech walk me through all the troubleshhoting that he could. One thing he had me do was to dissconnect the entire sensor and motor wiring from the system and boot it up.. It should have been able to initialize all the way through, but it didn't work. Then he had me leave it with the error code still showing and plug the stuff back into the system. That should have cleared the error. It didn't. From what he was able to determine, without actually checking the sensors, was that it is probably the board. the only other suggestion he had was to slice the wires on the x and y sensors and switch them. if that made the x moter work and the y motor bad, that would be the sensors. I just don't feel like slicing up the wiring harnesses just yet. I have an electrician that is coming over after work to check the sensors using his equiptment. and another guy that is going to bring over a tool to remove the wiring harness connectors without cutting the wires. So if the sensors test as good with the electrician, we can test them in the opposite locations without cutting any wires. Wish me luck. Oh, and just in case, the electrician, found the sensors for 93 cents apiece and ordered some for me. No more $50.00 sensors LOL Wish me luck. I really don't want to have to change the motherboard.
The tech had even suggested a weak motor, but disconnecting the motor canceled that idea.



I have attached the partrts diagram that shows the setup.
Attached Thumbnails
help, I'm stuck-x-y-motor-1-.gif  

Last edited by dubiat; April 27th, 2011 at 04:58 PM. Reason: more info
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Old April 28th, 2011, 02:12 AM   #6 (permalink)
dubiat dubiat is offline
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Default Re: help, I'm stuck

Thank you to everyone that offered help. The machine is up and running. I had the electrician check it out. The power was going into the sensor, but was not putting any output. It seems that the new sensor had something stuck in the lens area so it was reading as open. Once we scraped out the lens area with a thin piece of plastic (very carefully), the machine worked just fine. So now I can work again. Thank you again for everyone's help
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Old April 28th, 2011, 03:02 PM   #7 (permalink)
dubiat dubiat is offline
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Default Re: help, I'm stuck

machine is back down. I now have the same problem, but it was random, when I started today, then everytime I changed a setting of any kind. Now it's all the time again.
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