Zaxis 210-1 throttle not revving enough

[Wits_End]

I was having issues with having to basically recalibrate the stepper motor every time I started the machine. I continued doing this until one day it started making pretty gross racket when I tried to calibrate, the machine would then turn on full throttle and would not adjust. I found my issue and fixed it and have been waiting to get back on here and give the machine time to ensure it is really fixed.

I too started hearing more of a loud clattering and decided to just take apart the stepper motor assembly for inspection. I found oil/grease with lots of dirt and junk on the inside and a broken rubber gear. I imagine the junk got in there from a failed seal, then wedged in the gear and wore it out over time. The stepper motor itself was very clean and would likely work perfect. What I have found is that the rubber gear is on the position sensor shaft and during the calibration procedure it is made to strip out a few times once maxed out, thus being rubber.




It took some looking, but found the replacement rubber gear, but it was $40 and took weeks to get in, while the stepper motor was $140 and took a few days. I didnt know for a fact that the stepper motor was going to fix it all, so I went with the cheapest option. I installed, calibrated, adjusted the throttle to spec and so far it has worked flawlessly.

I appreciate all of the effort in helping me understand more about this system!

 

[Volvomad]

Fitted ecu, reset motor center position and ran throttle learning. Same sh!t. Ripped stepper motor and that rubber gear has 1 tooth missing. I have an old motor round here somewhere but it is hiding on me at the minute. Hopefully that will cure mine aswell. Not sorry (yet) for changing ecu as i think the old one may have been a fire hazard. Is your machine still working Wits_End? Where did u get the gear?

 

[Wits_End]

Fitted ecu, reset motor center position and ran throttle learning. Same sh!t. Ripped stepper motor and that rubber gear has 1 tooth missing. I have an old motor round here somewhere but it is hiding on me at the minute. Hopefully that will cure mine aswell. Not sorry (yet) for changing ecu as i think the old one may have been a fire hazard. Is your machine still working Wits_End? Where did u get the gear?

You can get the gear on ebay from China, search for Hitachi Rubber Gear, I see prices from $45-75. I purchased the entire stepper motor off ebay for $140. The machine is working great.