1/16 Bucyrus-Monighan Walking Dragline

[9W Monighan]

Originally Posted by modelman

Looking good steve-I don't understand the 2-small sheaves over the boom point sheave. What's that all about?

Those are for the suspension cables. There are 6 of them up there and two smaller for the cable ends. This machine has a "Live Boom" but after it's at the proper angle there's two sets of safety cables attached to the mid points. You'll see when I get to that stage. The B/W picture is a boom from probably a 6160 with a two part hoist,notice the attachment under the boom and it has a smaller diameter sheave. This one is: 44''dia. and mine will be:58'' (3.625''scale)

[D8R]

Looks nice, huch much time do a part like that take in programming, preparation and production??

Dan

[9W Monighan]

Originally Posted by D8R

Looks nice, huch much time do a part like that take in programming, preparation and production??

Dan

HA HA! I spent about 8hrs yesterday fine tuning the program and producing the part and like I said;my endmill was dull and I took lighter .030'' cuts 1.2ipm feed on my pockets. The outside had 435 events. The inside had less because there wasn't as big of a area to machine. I didn't get any pictures of the inside. I sure hope the other three pieces don't take 8hrs each That reminds me, I want to order a new carbide endmill to do the others.

[JAMMER]

Steve that is some very nice work as usual from your shop. Ed

[Operator]

Originally Posted by 9W Monighan

HA HA! I spent about 8hrs yesterday fine tuning the program and producing the part and like I said;my endmill was dull and I took lighter .030'' cuts 1.2ipm feed on my pockets. The outside had 435 events. The inside had less because there wasn't as big of a area to machine. I didn't get any pictures of the inside. I sure hope the other three pieces don't take 8hrs each That reminds me, I want to order a new carbide endmill to do the others.

.030".....HA, thats hogging metal on my baby mill!

How many channels does that take to run?

Looks like you got a couple inverters for the 12v? or 24?

Could you take a brief min. and kinda explain to me how the machine is wired? like inverter to? to? and motor goes to? and so on.

You can PM me if you don't want to clutter your thread up. I'll have a bunch of ?
Thanks
Matt

[9W Monighan]

Originally Posted by Operator

.030".....HA, thats hogging metal on my baby mill!

How many channels does that take to run?

Looks like you got a couple inverters for the 12v? or 24?

Could you take a brief min. and kinda explain to me how the machine is wired? like inverter to? to? and motor goes to? and so on.

You can PM me if you don't want to clutter your thread up. I'll have a bunch of ?
Thanks
Matt

I made another one of those plates tonight. New endmill but kept the same program. Saw where I can make improvements on the program and shave about a half hour off. I didn't want to change it till I go to the RH pieces. I'll go with about 3ipm and a .05'' cut next. That's architectural bronze CDA385 I have laying around alittle harder than the free machining CDA360 leaded brass. One of the reasons you can't plow through fast. That stuff wears out tools surprisingly fast.

As far as channels, I'm using 3 : dragging/walking,hoisting, swinging, I will need a couple more to set the drag and walking brakes.One for the walking jaw clutch. Maybe another for turning the lights on off. Horn? I have a DX7 radio (overkill)

110VAC Power is run into the tub then through a 6 conductor slip ring. then the power goes to a relay that is manually controlled back at my power box for safety purposes to kill it if something happens or someones fingers get in there. After the relay the voltage is fed to the 3- 90VDC 4 quadrant regenerative drives and a 5VDC power supply. The RC part comes from the 3 ESC's attached to the reciever and then each is individually wired to the 3 regen drives. Power to operate the Receiver and ESC'c comes from the 5VDC power supply. The ESC's put out a +5 or-5V signal and that is fed to the drives and they start when the voltage comes in. The drives are then wired to three 90VDC perm. magnet motors,1/29hp=hoist 1/17hp=swing 1/8hp drag/walk. The whole deal draws only 1.5a not to mention when I'm lowering the hoist, I'm generating power back into the incoming 110VAC line. Pretty simple only took me 8yrs and a bunch of $$ and trial and error.

My big plan is to hard wire the whole machine and control it with the original operators controls from a 1:1 machine. All I have to do is pull all the electronics off and put them back to my operators station and put a slip ring in with more conductors. I could also tear apart my radio and install the pots on the stick to my 1:1 controls.
RC just made it alot easier to do.

[9W Monighan]

A little more update on the boom point this past week.











Four sides now done.

[Stuff]

oh my that is nice!!

[Brian in PA]

Nice progress Steve Is that first pic from cabin fever?

Brian

[9W Monighan]

Yes Brian, I took that Saturday night when they kicked us out. Get that triaxle done so you can haul at the next York show.

[modelman]

Looks great steve! Always waiting to see more!

[D8R]

looking good as usual, Steve. Looked the vid with one of my friends (who also visit Brownsville) , he has more than 20 real machines,. A question, it looks like there to little weight in the bucket, is this only a test bucket? You had a bigger one on side of machine, is that the one that will be used??
Dan

[9W Monighan]

Originally Posted by D8R

looking good as usual, Steve. Looked the vid with one of my friends (who also visit Brownsville) , he has more than 20 real machines,. A question, it looks like there to little weight in the bucket, is this only a test bucket? You had a bigger one on side of machine, is that the one that will be used??
Dan

That's a smaller bucket we used because I didn't see the real problem till I got home and it was two set screws on the hoist motor shaft came loose and you can't see the motor shaft spinning inside of the hoist pinion cross shaft. It used to be pressed on slightly. I couldn't pick the big bucket up empty. After 6yrs I guess you find these unseen problems,after all it was only the second time this has been in the dirt actually working. It's fixed now and I wish I found the problem at the show. I think I described this problem earlier.

I'll have more pictures soon on the boom point. I just cut a piece of 3.75'' round stock this morning for the point sheave. I'll be working on the cradle that holds the point sheave tonight.

[9W Monighan]

Lots of time fooling around with these two pieces.

Profiling out one of the pillow blocks that hold the point sheave cradle.


Drilling and boring


Just need the bronze bushing installed.


Hogging out the cradle


Pocketing one of the sides at an angle


Ready to turn the end pins


Roughing in one end between centers



Final finishing


Completed cradle ready for deburring and final finishing to remove tool marks.

[ihbuilder]

All I can say

[JAMMER]

That looks real good Steve you do have a talent and a lot of patients more than I in either case. Ed

[Stuff]

WOW indeed!! also first time seeing that kinda lathe chuck.

[9W Monighan]

I like to machine

[kerst]

Originally Posted by 9W Monighan

I like to machine

Me too!

Thanks for sharing!

Kerst

[SmallHaul]

Wow! That is amazing work Steve. I hope to someday have the talent and patience to make pieces like that.