rcferguson
Full Member
Posts: 182
Machine: Carve King
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Post by rcferguson on Mar 26, 2019 2:11:28 GMT
Yes, thanks. I have something much like that in mind. |
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rcferguson
Full Member
Posts: 182
Machine: Carve King
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Post by rcferguson on Mar 26, 2019 2:12:24 GMT
You could try the Simulation function in Fusion 360 to verify if your support design is strong enough. It should be able to predict deflection under load. Thanks, but that's probably overkill, though I may look into it when I have some time on my hands. |
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rcferguson
Full Member
Posts: 182
Machine: Carve King
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Post by rcferguson on Mar 28, 2019 21:02:48 GMT
Making progress. I have some .5" x 3" x 12" stock on hand, so I cut the horizontal parts. Rest of the material will be delivered today, so will get working on those parts. I'll probably just bore a bunch of holes in the base plate and thread them for clamping a vise wherever I need it. Modeled a 2 liter pop bottle in as a hopper for plastic pellets. I'll just cut the bottom off and fill it as needed.
Getting a lot of use of of my Carve King! One day I may even use it to make a sign or two. Wish it was faster, but I knew what I was getting into. Gives me time to work on more mold designs while it is cutting.
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rcferguson
Full Member
Posts: 182
Machine: Carve King
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Post by rcferguson on Apr 10, 2019 20:58:52 GMT
So frame is now complete. I still have to cut the feed delivery parts to hold the bottle in place and feed plastic pellets into the barrel of the ram. Also have to do some fixturing to hold molds in place under the injection nozzle. I left lots of room under the nozzle so I can use a variety of mold sizes. I also may do some fixturing with injection pins, so it will be good to have room to work under there.
Here are a few pictures:
Cutting some supports to hold the base plate on the Carve King. I'll bolt them down, then run a facing operation to ensure they are all level.
I bored around 80 holes in the base plate so i can attach fixtures. I only tapped around 30 of them. If I need more I will do them as needed.
Here's the machine all assembled.
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Post by Derek the Admin on Apr 12, 2019 1:14:03 GMT
Freaking awesome man! I want one!
Have you tested it all out yet?
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rcferguson
Full Member
Posts: 182
Machine: Carve King
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Post by rcferguson on Apr 12, 2019 2:17:01 GMT
Freaking awesome man! I want one! Have you tested it all out yet? Not yet...I still have to make a fixture to hold the mold clamp in position. Probably work on that tomorrow.
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rcferguson
Full Member
Posts: 182
Machine: Carve King
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Post by rcferguson on Apr 17, 2019 17:51:53 GMT
So, it took a little longer than I expected to design a fixture. I have to take into account the distance from the extrusion head to the top of the mold (which can vary in size), materials I have on hand, and strength of the fixture. I came up with this monster, which will have interchangeable spacers to accommodate different size molds. I didn't model in the clamp which will hold the mold in place during injection since I already have that and will just bolt it in.
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Post by Bruce on Apr 17, 2019 19:54:09 GMT
Really interesting work Rob. Look like you're getting to be an expert at Fusion 360 too.
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rcferguson
Full Member
Posts: 182
Machine: Carve King
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Post by rcferguson on Apr 17, 2019 20:22:20 GMT
Really interesting work Rob. Look like you're getting to be an expert at Fusion 360 too. The only way to get to Carnegie Hall!
I learn a little more every day.
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rcferguson
Full Member
Posts: 182
Machine: Carve King
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Post by rcferguson on May 17, 2019 20:44:09 GMT
I cant post any more pictures in this thread... I get a message saying the forum has exceeded it's storage limit. Probably my fault. I suppose I have posted too many pictures. Sorry!
Anyway, this last part took me a while, as the head of my Carve King keeps coming apart. Just too much vibration I guess. The Z rails won't stay parallel; they are closer together at the bottom than at the top, and no amount of cranking on the screws and applying Loctite stops them from coming loose. Anyway, after taking it apart and reassembling several times to tighten things up, I finally finished this fixture and a spacer for one of my molds.
I just have to mill the plastic pellet feed ramp and mount the hopper bottle and I'll be ready to try it out.
***EDIT*** Able to add pictures now.
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Post by Mototech on May 18, 2019 0:50:40 GMT
I cant post any more pictures in this thread... I get a message saying the forum has exceeded it's storage limit. Probably my fault. I suppose I have posted too many pictures. Sorry! Well, I for one am glad you did. I learned alot and it's really cool to see others able to make their dreams come true with a Millright cnc😎 |
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Post by Derek the Admin on May 19, 2019 11:50:45 GMT
I'll clear some space. Proboardsbis really starting to hit us in storage space.
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Post by Bruce on May 20, 2019 2:05:08 GMT
I cant post any more pictures in this thread... I get a message saying the forum has exceeded it's storage limit. Probably my fault. I suppose I have posted too many pictures. Sorry! Well, I for one am glad you did. I learned alot and it's really cool to see others able to make their dreams come true with a Millright cnc😎 Agree indeed! 👍 |
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rcferguson
Full Member
Posts: 182
Machine: Carve King
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Post by rcferguson on May 21, 2019 21:44:56 GMT
I was busy setting up to cut the 4 pieces I would need for the feed ramp when it occurred to me that this part doesn't need to be cut from aluminum. I could just 3D print the part in one piece from PLA. It doesn't need to be really sturdy or withstand heat. I got so focused on milling everything that I almost didn't see the obvious. So I quickly modified the parts and sent it to my Solidoodle and 4-1/2 hours later I have the perfect part(s).
...so one would think.
I made a slight miscalculation... when the ram pushes down into the barrel of the heated plastic reservoir, the entire assembly, reservoir, heating element, shield, and pellet hopper all move downward about a half inch. The pellet hopper is basically just a funnel that fits over the reservoir barrel, and you fill it with plastic pellets by hand with a scoop. The problem with it moving is that the feed ramp I designed stops feeding pellets when the hopper is full. When the hopper drops down a half inch, there is nothing to stop the pellets from cascading out of the feed ramp until the bottle is empty. I have to figure out a new feed system the closes the feed ramp when the hopper descends to prevent this. Back to the drawing board.
The good news is that the new pneumatic frame works great! I was able to make a number of parts, and nothing looked like it was going to bend or break.
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rowiac
Full Member
Posts: 230
Location: California
Machine: M3
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Post by rowiac on May 22, 2019 15:22:53 GMT
How did we live without 3D printers and CNC machines?  |
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