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Forum: Construction Equipment 01-13-2024, 06:36 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

Thanks Jerry. I hope the tie down system is as solid as expected.

Tapping the stainless steel nutplates sucks, so I ordered some aluminum nutplates. Thread tear out will be a concern.
Forum: Construction Equipment 01-07-2024, 02:32 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator now is a little strap to secure the bucket and slew

I needed a new brake bleeder for my real truck. Did the vacuum style, so maybe I can use the same to degas the resin. Haven't tried it yet.

The little ZX did get its first taste of real dirt....
Forum: Construction Equipment 11-05-2023, 06:56 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

Tried out the elevated pour. So far so good. Still has small internal bubbles when cut, but OK for my use.

https://i.ibb.co/4Vk4d8r/track-pads-molded.jpg...
Forum: Construction Equipment 10-24-2023, 09:26 AM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

Thanks frizzen. Extending my funnel upwards would be real easy to try. Lets we how it does.
Forum: Construction Equipment 10-22-2023, 10:02 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

Been quiet around here in all sections.

I was too slow to paint the kenco and it rusted up. Recut it in stainless and painted it. Found some super thin .15mm THK M1.6 washers for assembly....
Forum: Construction Equipment 01-12-2023, 10:06 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

Electromagnet in the barrier lift works pretty well. Ended up using a brushed ESC instead of a switch so I can power it with fully battery voltage, then limit it to 5V via travel endpoints on the...
Forum: Construction Equipment 12-13-2022, 07:32 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

Been looking for an easy way to add some aux connections near the bucket. Technically there is room for 4 more valves, but I'd rather not be that tightly packed. I'm going to do electric. Will be...
Forum: Construction Equipment 09-18-2022, 08:30 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

I drew out the path and also where it could be getting lost. The guide groove is inside the bore which is 4.5mm. Difficult to even see if the contours are well formed by lost wax casting.
...
Forum: Construction Equipment 09-14-2022, 10:08 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

Thanks Egronvold.

Time to step away from the ZX and tackle the barrier lift mechanism. The full scale looks to operate with a bi-stable latch which allows the jaws to engage every second plunge....
Forum: Construction Equipment 08-07-2022, 01:55 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

Thanks for the kind words.

I started by looking for something off the shelf. Best option I saw was for drone/multicopter. Those were not quite right, but workable.
Forum: Construction Equipment 08-05-2022, 10:09 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

Decided I'm going to rewind the GB2208 gimbal motor for use on the slew. I've done that a few times before on RC crawlers. Would like to increase the current quite a bit too. Lots of trial and error...
Forum: Construction Equipment 07-13-2022, 11:30 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

experimented with a gimbal motor for the slew. It's a 2208 outrunner 127kV so it's super slow. Paired it with a 62:1 gearbox. It's ultra quiet and smooth, but still cogs a little at startup so it...
Forum: Construction Equipment 06-14-2022, 12:55 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

They're mid-priced. All the parts in the photo were $71 shipped. Enough to build 2 with some spares.
Forum: Construction Equipment 06-12-2022, 01:49 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

Trying the drive with side sliders is rough. Instead there are three flight modes:

1.) "Default" allows fully control of the machine. SAE excavator controls on the sticks and the tracks are driven...
Forum: Construction Equipment 06-12-2022, 01:34 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

I really struggled with the hose installation. Flat nose pliers would mangle the hose, and heat would melt the end 9 times out of 10. The German forums' talked about "hose pliers" which sent me on a...
Forum: Construction Equipment 05-13-2022, 04:42 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

https://i.ibb.co/0CxNFRw/model-19.jpg
https://i.ibb.co/PW88PZg/model-22.jpg
https://i.ibb.co/RC85ydn/model-18.jpg
https://i.ibb.co/TRx5HqT/model-23.jpg...
Forum: Construction Equipment 05-03-2022, 07:42 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

Still doing a ton of painting sanding polishing. Connected the drive and slew motors to try them out, but otherwise no real assembly progress. I did decide to add hydraulic quick disconnects off the...
Forum: Construction Equipment 04-26-2022, 10:53 PM
Replies: 28
Views: 4,643
Posted By Blender
Re: Metal Hobi MH-245 kit as Hitachi ZX245 excavator

Chassis is painted and assembled. No issues to report, but i did fish a little piece of grit out of the tower bearing. Now it's silky smooth. Decided to leave the tracks raw black so they don't gum...
Forum: Construction Equipment 04-19-2022, 10:01 PM
Replies: 28
Views: 4,643
Posted By Blender
Metal Hobi MH-245 kit as Hitachi ZX245 excavator

Here's a build thread of the Metal Hobi MH245 excavator kit. It's the 3 valve mono boom in 1:14.5. Had the 7 valve split boom with plow been available that would have been my choice. This is my first...
Showing results 1 to 19 of 19

 
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