RC Hitachi ZAXIS 210

[RC Tractor Guy]

Does anybody have any questions about how I created my radio controlled Hitachi zaxis 210 from a static diecast ROS model? I can get some pictures if anyone would find it helpful or videos discussing particular sections.

[Bill]

Have you done the conversion on thr ROS Hitachi excavator?
Bill

[RC Tractor Guy]

I got the tracks working and the boom working well during testing but when I made my own control board for it I ran into trouble and haven't figured it out yet. Never figured out how to do the slewing either, it's a very tricky build as it is very heavy.

[thomas]

what size of servos did you use on this thanks ,, and how did you power the tracks thanks.

[RC Tractor Guy]

I used a HK15178 for the bucket and two HK15148B servos for the rest of the boom. But as I said in the video I had lots of trouble lifting the boom as its so heavy so I've yet to solve that.

The tracks are two HK15178 with the servo controllers removed so that it's just the motor and gearbox with the motors driven by an L293D motor driver chip controlled by an Arduino.

I have another excavator model ordered and I'll be doing it like this. Using geared motors like this and this to make screw mechanisms that lift boom and everything else. That's the plan anyway.

I have a video I'm editing at the minute of a marton half-pipe trailer using this kind of motor which I might get uploaded tonight. The motors are a little expensive but they are pretty powerful.

[thomas]

Yeah the screw drive cylinder are good job used them on a bruder trailer to tip using a drill bit for the screw , but drill bit might be a bit big for 1/32 . Was looking at the britains digger I have , I think I could put a few servos in it . But not sure yet about the tracks

[RC Tractor Guy]

I used some threaded m3 bar for my screw meachanism seems to work pretty good, a bit of grease when I finished the model and I'd say it will be perfect although maybe a little slow. Here is the first part of the half-pipe trailer conversion, skip to the end to see my screw mechanism.

What type of digger is that, a 1:16 scale model?

[thomas]

JUST WATCHED your video great job , i get 3mm threaded bar at local hardware shop , they order it in for me , have you a link to that motor thanks

the digger is 1/32 it,s a old britains one , waiting on parts now ,

[RC Tractor Guy]

Here is the link to the motors, they're nice steel gear motors. I ordered an old pc400 model I'm going to use screw mechanisms hidden in the boom for that hopefully.

[thomas]

just seen your loading the trailer video looking good , how is the homemade controller going , how much rough did it cost you to build cheers ,

[RC Tractor Guy]

The controller is the one from the IC station keypad shield video, I haven't changed it since then. So it is made up of two joysticks (€2.50 each), keypad shield (€4.60), Arduino uno (€8.50) and an XBee (€24) so around €42. I've ordered some €5.25 rf modules from ic station which may be able to replace the xbee, that would bring the cost down a lot.

[robbasham]

Hello i have a cheap £40 digger with all the functions of this hitachi and i was thinking would i be able to transfer all the electronic parts from the digger i have into a static model i would keep this digger standard but it is too big for my model farm as it is what appears to be an industrial size digger, so would i be able to transfer all the electronics into a smaller digger ? some of the features of this digger are as followed forwards backwards spin left spin right turn body right turn body left and a working boom. Any help would be great Thanks Rob (sorry if i posted in the wrong place i just registered to the forum)

[RC Tractor Guy]

Welcome to the forum. I'd guess your model is plastic? I'd guess but could be wrong that the motors for the boom at least might not be able to lift the die-cast boom, I found that to be the hardest part of the build. I'd say if you could squeeze the other electronics for the tracks and slew they would probably work but the boom is very heavy I'm afraid.

What model exactly do you have? You might be able to upgrade the motors but I think it would be a tricky build.

[robbasham]

the digger i have its a revell 1:28 scale excavator (thanks for the warm welcome)

[RC Tractor Guy]

Oh yes I've seen videos of that model before. I'm not sure how strong the motors are, it may be possible but it's also possible you'd end up with two broken models which would not be good. If the revell model can be taken apart easily you could measure the control board and I'll see if those dimensions would even fit in the Htachi.