Water Wizard 6500 Getting Stuck Mid Wash

[MaxCW]

I have an early 2000s Water Wizard that has been getting stuck in the middle of its tracks during washes. The rails are not damaged or pitted. On occasion one of the J1000s in the control panel of the gantry for the drive motor will display a Uu1 error, but I think this is due to timing out when it’s trying to move down the track. I have replaced the motor on that side and the issue persists.

The oscillator motor J1000 will also periodically display an oC error. Neither error happens simultaneously, and sometimes the problem will occur with no error message at all.

Proxies are healthy and so are their power cords, which is a solution I have seen mentioned. The main power cord to the gantry has previously been damaged. I have spliced and waterproofed it a few times thinking that was the primary error, but each time I’ve opened it up it is dry and each wire is firmly connected. I have a new one on the way just in case. I’ve inspected the length of it and there are no other damaged areas.

Finally, I will occasionally get a counting error alarm on the red lion because the boom moved while the gantry was moving. This has occurred since I purchased the unit and has never caused issues that I’ve been aware of. Proxies and their cords have been replaced, I’ve run numerous successful counts, but that issue persists.

I am open to any and all feedback. Please help! Thanks in advance!

 

[Greg Pack]

With both your driver motors and oscillating motors having issues I'd suspect power supply issues UU1 is an undervoltage error, and the OC1 on the oscillators is an overcurrent error(which usually indicates a bad motor or a bind). Both could be related to power supply issues. I'd try a new SO cord and check (and double check) all connections from the three phase breaker in the ECC that feeds power to the gantry out to the VFDs. A simple loose wire on one of VFDs looped over from the switch could potentially cause an issue like this.

Look at your alarm records and see if the fault is happening in the same spot every time. If so that could be a track problem or a binding problem. Inspect the boom bearings on the wall and where the boom attaches to the gantry. On the drive motors , If one drive Lovejoy has sheared a key or the spider is worn out it can put the gantry in the bind. To ensure this isn't the case inspect the drive components-make sure the Lovejoy's are OK and all wheel bearings are good.

If you are still running out of potential solutions You may even want to open the pecker heads and inspect and redo the wiring. When chasing gremlins with a motor involved, it might be helpful to use a megohmmeter and test the drive motor windings. The supco m500 is a cheap easy to use meter with idiot lights. Even though a motor that test bad can actually work if you can't find any other issues you may have to replace them to make the problem go away. I've actually had to pull new motor wire in the gantry before after a catastrophic short so there's that.