Arcade Collecting > Arcade1Up & Similar
Arcade 1up Star Wars released and Discussion of Yoke
PL1:
--- Quote from: Zebra on October 19, 2019, 05:26:57 pm ---The handles look relatively straight forward in those pics. I can't see any complexity or unusual difficulty at all as far as cnc machining goes.
--- End quote ---
The problem isn't the complexity, it's that you can't do it with a 4-axis CNC.
There are 3 areas that need to be milled out:
1. Switch cavity side (angled 15 degrees)
2. Tapered shaft mount side
3. Two shaft-screw holes
Note that 1.) the handles are angled, not perpendicular to the handle shaft and 2.) the shaft-screw holes are on the back of the handle.
Those shaft-screw holes correspond to the ones drilled into the handle shaft. (2nd part from right)
The CNC's 4th axis can rotate the work piece to mill 2 of the 3 areas vertically, but not the other one.
- In this case, Meatloaf got it wrong -- two out of three is bad. :lol
The only two ways I can think of to do this with one initial setup on a 4-axis CNC is to:
1. Make handles without the 15 degree ergonomic tilt.
or
2. Move the shaft screws from the back of the handle to the bottom and drill new holes in the handle shaft.
--- Quote from: Zebra on October 19, 2019, 05:26:57 pm ---It looks like it would also be fairly easy to do a sand casting of for those who are into that.
--- End quote ---
Seems like a sand casting would probably lose some critical detail for the cotter pin and microswitch screw holes. :dunno
--- Quote from: Zebra on October 19, 2019, 05:26:57 pm ---Is that the only plastic part that should be aluminum?
--- End quote ---
Vigorous gameplay can exert a lot of force on the controller parts when you slam into the stops so it's probably best to follow in the path of the original engineers.
The S.T.U.N. Runner yoke used these plastic handles. (pg 32 of the manual here)
--- Quote from: Zebra on October 19, 2019, 05:26:57 pm ---I am assuming that nobody is suggesting replacing any of the internal parts? Plastic gears are not necessarily an issue for these things. They are used without problems in lots of directional guns.
--- End quote ---
The nylon/delrin(?) gears (especially the 14 tooth one) are a relatively weak point compared to the tank-like durability of the rest of the original controller, but usually aren't a problem for home-use.
If you eventually do need to replace them, it makes sense to upgrade to aluminum gears if Alan-1 starts selling them next year.
Scott
Zebra:
--- Quote from: PL1 on October 20, 2019, 04:21:13 am ---
--- Quote from: Zebra on October 19, 2019, 05:26:57 pm ---The handles look relatively straight forward in those pics. I can't see any complexity or unusual difficulty at all as far as cnc machining goes.
--- End quote ---
The problem isn't the complexity, it's that you can't do it with a 4-axis CNC.
There are 3 areas that need to be milled out:
1. Switch cavity side (angled 15 degrees)
2. Tapered shaft mount side
3. Two shaft-screw holes
Note that 1.) the handles are angled, not perpendicular to the handle shaft and 2.) the shaft-screw holes are on the back of the handle.
Those shaft-screw holes correspond to the ones drilled into the handle shaft. (2nd part from right)
The CNC's 4th axis can rotate the work piece to mill 2 of the 3 areas vertically, but not the other one.
- In this case, Meatloaf got it wrong -- two out of three is bad. :lol
The only two ways I can think of to do this with one initial setup on a 4-axis CNC is to:
1. Make handles without the 15 degree ergonomic tilt.
or
2. Move the shaft screws from the back of the handle to the bottom and drill new holes in the handle shaft.
--- Quote from: Zebra on October 19, 2019, 05:26:57 pm ---It looks like it would also be fairly easy to do a sand casting of for those who are into that.
--- End quote ---
Seems like a sand casting would probably lose some critical detail for the cotter pin and microswitch screw holes. :dunno
--- Quote from: Zebra on October 19, 2019, 05:26:57 pm ---Is that the only plastic part that should be aluminum?
--- End quote ---
Vigorous gameplay can exert a lot of force on the controller parts when you slam into the stops so it's probably best to follow in the path of the original engineers.
The S.T.U.N. Runner yoke used these plastic handles. (pg 32 of the manual here)
--- Quote from: Zebra on October 19, 2019, 05:26:57 pm ---I am assuming that nobody is suggesting replacing any of the internal parts? Plastic gears are not necessarily an issue for these things. They are used without problems in lots of directional guns.
--- End quote ---
The nylon/delrin(?) gears (especially the 14 tooth one) are a relatively weak point compared to the tank-like durability of the rest of the original controller, but usually aren't a problem for home-use.
If you eventually do need to replace them, it makes sense to upgrade to aluminum gears if Alan-1 starts selling them next year.
Scott
--- End quote ---
None of those things would prevent it being made on a cnc machine. You wouldn't even need the 4th axis (although it would reduce the need for two set-ups).
There is nothing that could be done on a manual mill that can't be done on a cnc machine but there is plenty you can do on CNC that would be impossible on a regular mill. The only things you really need a 4th and 5th axis for is parts with undercuts or particularly thick or deep parts.
Drilling holes is no issue either but adding screw threads usually needs a separate threading attachment. That's the sort of thing that would be easier, quicker and cheaper to do manually after it has been machined. There's only a few screw holes, it would take just a few minutes.
I don't see any fine detail that would prevent casting either. I can't see any fine engravings or other small details. I've seen far more complex castings although it wouldn't be my preferred method as I find working with melted aluminum terrifying. For somebody who already does hobby sand casting, it wouldn't be a big deal though.
PL1:
--- Quote from: Zebra on October 21, 2019, 04:31:08 pm ---None of those things would prevent it being made on a cnc machine.
--- End quote ---
Oops. :embarassed:
I meant to say that it is impossible to make this entire part on a 4-axis CNC with a single set-up.
- 4-axis CNC ==> 2 set-ups
- 3-axis CNC ==> 3 set-ups (Switch cavity side, tapered shaft mount side, and two shaft-screw holes)
--- Quote from: Zebra on October 21, 2019, 04:31:08 pm ---adding screw threads usually needs a separate threading attachment. That's the sort of thing that would be easier, quicker and cheaper to do manually after it has been machined. There's only a few screw holes, it would take just a few minutes.
--- End quote ---
Agreed. :cheers:
Scott
Zebra:
--- Quote from: PL1 on October 22, 2019, 02:25:18 am ---
--- Quote from: Zebra on October 21, 2019, 04:31:08 pm ---None of those things would prevent it being made on a cnc machine.
--- End quote ---
Oops. :embarassed:
I meant to say that it is impossible to make this entire part on a 4-axis CNC with a single set-up.
- 4-axis CNC ==> 2 set-ups
- 3-axis CNC ==> 3 set-ups (Switch cavity side, tapered shaft mount side, and two shaft-screw holes)
--- Quote from: Zebra on October 21, 2019, 04:31:08 pm ---adding screw threads usually needs a separate threading attachment. That's the sort of thing that would be easier, quicker and cheaper to do manually after it has been machined. There's only a few screw holes, it would take just a few minutes.
--- End quote ---
Agreed. :cheers:
Scott
--- End quote ---
I'd agree with that but it's not such a big deal to turn the part mid-way through if it's a one-off or short run. It's just part of the process with CNC machining at the cheaper end of the market. If you were setting up production of this part as a business, you'd invest in a decent 5 axis head and tool changer to make it a one step repeatable process. If you were making it for yourself and a few other members, you wouldn't worry about the efficiency so much.
It looks like that part is made in multiple sections with the front and back screwed together. If I was just making one for me, I might adjust the design a little to make each handle as one piece.
Incidentally, I just watched a clip from A New Hope to see what the original movie yoke looked like and Atari were way off. The handles are too close together, they are the wrong shape and the buttons are in the wrong position. And, even the deluxe cockpit version of the cab didn't have a moving seat. It's a shame this franchise never got an arcade cab that could do it justice....
It is just begging for someone to add a recoil project using double solenoids to simulate those Millennium Falcon guns that move back and forward when shooting as seen at 1.43 of this clip:
And a moving seat!
negative1:
some disassembly of the yoke:
another review:
later
-1
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