Rotary axis MPCNC

New Home Forum Random or Off Topic Rotary axis MPCNC

This topic contains 63 replies, has 9 voices, and was last updated by  Mike Atencio 1 day, 17 hours ago.

Viewing 30 posts - 1 through 30 (of 64 total)
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  • #98276

    Mike Atencio
    Participant

    Is there a plan to make a 4th axis/rotary axis MPCNC? If not, there should be. That would be phenomenal.

    #98278

    Ryan
    Keymaster

    There are already a few options on thingiverse.

    #98283

    Kelly D
    Participant

    I can’t tell you how many times I’ve told people “that’s next” in the last month or two…..Even just to swap the Y so it’s still a 3 axis machine would be cool. I saw some cylindrical laser etches not long ago…..very very cool. May have been here? Can’t recall. I’m sure it was though.

    #98291

    Mike Atencio
    Participant

    Hi Ryan. Thingiverse? It has a way to add a rotary lathe to the MPCNC machine? How do I find it?

     

    #98292

    Mike Atencio
    Participant

    I found this on Thingiverse! Thanks, Ryan.  I never even thought this would be on there. https://www.thingiverse.com/thing:1877336  

    How is it controlled?

     

    #98293

    Ryan
    Keymaster

    https://www.thingiverse.com/thing:1877336

    https://www.thingiverse.com/thing:1731833

    I think there are more, maybe check the gallery for projects that use them and there should be a link.

    #98294

    Mike Atencio
    Participant

    Here it is:  https://www.thingiverse.com/thing:1877336

    Now you have one like me!

    #98296

    Guffy
    Participant

    After that think how you will control it. Grbl (and probably marlin too) isn’t an option.

    #98297

    Mike Atencio
    Participant

    I like this one better than the other: https://www.thingiverse.com/thing:1877336

    It’s what I was looking for.

    #98298

    Mike Atencio
    Participant

    Hmmmm Good point.

    #98301

    Ryan
    Keymaster

    Most people just substitute the rotary for an axis and use either firmware. There are a few threads about it.

    #98302

    Guffy
    Participant

    Then it still 3 axis cnc, just another kind of 3 axis

    #98304

    Guffy
    Participant

    So for true 4 or more axis cnc you have to level up with pc – setup linuxcnc or paid mach3/mach4.

    Or use very specific multi axis firmware. Only one free i know is TinyG/TinyG2 from Synthetos.

    #98305

    Ryan
    Keymaster

    Nope, rotary. In this case what would you use the other axis for?

    4th-5th axis CAM is not easy to use, not easy on the wallet, and I am not sure I have ever seen either on the MPCNC. In regards to extra axis most that ask about it think it is the end all of CNC, not realizing you still have at least face you can not get to.

    #98306

    Guffy
    Participant

    I guess that Mike didn’t mean lathe-like cnc

    It seems he asked about true 4 axis cnc mode

    #98309

    Guffy
    Participant

    I had thought how it possible to build 5 axis cnc like pocket nc in the video above. From controller point of view. And only way i see at the moment, except using a PC, is build controller powered by TinyG firmware.

    2 users thanked author for this post.
    #98315

    Mike Atencio
    Participant

    No, I was wondering if a lathe could be added. Maybe the better question, now that It’s very complicated to make or too expensive to buy a rotary 4th / 5th axis, is it possible, using the regular MPCNC to take a carving file and cut on 4 sides to create a detailed rounded part?

    I have Vectric Pro and Aspire. I’m learning the software but they’re both very new to me. Vectric let’s us download a trial version to try out with unlimited time on it. I downloaded both. I think Aspire is a little overkill but if I need a new income, might as well have it.

    #98316

    Mike Atencio
    Participant

    Hi Guffy, It still can’t make larger items like table legs. That’s what I’d be using it for. The 5 axis machines are uber pricy. I’d love to have one but geez. I was thinking it would be better to buy a lathe, carve my basic shape on it, then move that piece to the MPCNC and finish cut it with the details. If I can turn the part 90 degrees and have the MPCNC carve on the rounded surface, that would be sufficient.

    Like these bedposts. The spiral posts and the acorn thing at the top.

    https://www.houzz.com/product/34410959-villa-valencia-king-poster-canopy-bed-victorian-canopy-beds

    #98317

    Kelly D
    Participant

    I don’t know why a lathe couldn’t be set under the MPCNC and then using only the Z and X (or Y) axis, carve profiles in spinning stock. Sure, I bet much like most things I’ve discovered with this whole CNC thing it’d likely be quicker by hand with parting tools and gouges etc. But the key with CNC is perfect repeatability. Not sure how you’d handle coding the profile though. I’m oversimplifying the discussion I know.

    1 user thanked author for this post.
    #98319

    Ryan
    Keymaster

    It still can’t make larger items like table legs. That’s what I’d be using it for.

    Why not? You can easily do this with a rotary axis.

    No, I was wondering if a lathe could be added. Maybe the better question, now that It’s very complicated to make or too expensive to buy a rotary 4th / 5th axis, is it possible, using the regular MPCNC to take a carving file and cut on 4 sides to create a detailed rounded part? I have Vectric Pro and Aspire. I’m learning the software but they’re both very new to me. Vectric let’s us download a trial version to try out with unlimited time on it. I downloaded both. I think Aspire is a little overkill but if I need a new income, might as well have it.

    I am getting confused to what you are looking for exactly. In the machining space semantics is dependent on your age an experience so maybe avoiding rotary and lathe in your description will help. As an example now everyone is starting to get in a huffy if you call the MPCNC a CNC machine “technically all 3d printers and machines are CNC….”, then there is the 2.5D argument, Mill vs router, etc. For me it starts to get a little unclear.

    #98320

    Mike Atencio
    Participant

    No, I don’t think you are. The prob would be getting Z to move around the perimeter as the lathe turns. One needs to know where the other is. I think they would have to be two separate jobs. Turn the piece to basic shape and size, then carve.

    #98326

    Kelly D
    Participant

    Then let me complicate the conversation then ; )

    In the ice carving world they make a lathe that uses a top mounted endmill (so hanging  much like the MPCNC). The profile is a literal hard profile that sits on top of the machine and the tool rides along the profile moving and down as it rolls over the profile.

    Here’s the kicker. On the old school ones there is no motor on the rotary. https://www.youtube.com/watch?time_continue=1&v=4gNF1xMJIQA (This guy is manually spinning it more than you need to TBH)  Just the spinning of the bit itself turns the ice – kinda gains momentum at 1:35. You can see the hardboard profile on the top of the machine. This one https://www.youtube.com/watch?v=YNJg1jtLF4U uses a low speed motor to spin the ice ad the endmill is CNC controlled on two axis.

    1 user thanked author for this post.
    #98327

    Ryan
    Keymaster

    As an example if your Y axis is now the spinning axis, you line up the X axis along the center line. There are a few videos with this on youtube with my machine and others. You would not want to move in the same direction as  the “spinning” axis, as it is already doing that for you.

    1 user thanked author for this post.
    #98329

    Mike Atencio
    Participant

    originally, I was wondering if it could be converted to add a 4th axis. The conversation morphed into this. Per your comment, MPCNC is what you sell it as so isn’t it a CNC machine? As for the lathe. well, the 4th and 5th axis is a lathe that turns and moves around for all sides to be cut.

    In the end, it got really complicated and I tried to simplify. It’s really not possible to do the 4/5th axis with MPCNC. It makes sense to divide the work into two parts, lathe work, and then carve work if it is possible to create the four sides to be cut repeatedly.

    I’ve noticed that people use the machine to do everything. If you just have to cut off edges, use a table saw. Faster than a router machine. Buy the lathe which is significantly cheaper instead of buying a 5 axis CNC machine. The MPCNC isn’t a 100% do all machine. I was wondering if there was an upgrade and if it had the capability to turn wood. It doesn’t.

    Sorry for the confusion. Hard to ask a question when you’re not sure what to ask or how to ask it.

     

    #98332

    Kelly D
    Participant

    There’s a now famous quote on here that I’ve heard Ryan and Heffe use in various forms. Something about using a hammer instead of a marshmallow. I’m sure i got that wrong ; )

    HAHAHA

    OctoPi is melting my mind…….

    1 user thanked author for this post.
    #98333

    Kelly D
    Participant

    2 users thanked author for this post.
    #98334

    Mike Atencio
    Participant

    The limited size of the Pocketed NC limits the length of the piece. That enclosure doesn’t look long enough to do more than smaller pieces.

    That’s why I was asking if the MPCNC could be upgraded to include the lathe function.

    #98335

    Mike Atencio
    Participant

    Hahaha Right? Yeah. Sometimes old school is better than fancy crap do-all, which compromises to achieve marginal results. I’d love to figure out how to take something square and using the MPCNC, make rounded, carved posts. It’s all in the drawing files and set up. That’s the hard part, how to create the files so the MPCNC can carve them. Maybe it would have to be six or eight-sided. to carve the faces easily.

    #98336

    Ryan
    Keymaster

    I was wondering if there was an upgrade and if it had the capability to turn wood. It doesn’t.

    But it does, we both linked options earlier? This is why I am I unclear to what you want.  You also said it can’t do table legs but it can. We are missing each others point somehow, me and you do this often. When you say this can’t do something I am compelled to prove it can.

    Do you have a link to a machine your are picturing? Perhaps an project you you are thinking the “rotary” stuff we linked earlier can not do without another axis worth of control?

     

    Just to add more to this, you can control more axis with Marlin, we have easy access to XYZ, E0 and E1+, you just need to adjust your post processor to output correct Gcode.

    #98338

    Kelly D
    Participant

    Hahaha Right? Yeah. Sometimes old school is better than fancy crap do-all, which compromises to achieve marginal results. I’d love to figure out how to take something square and using the MPCNC, make rounded, carved posts. It’s all in the drawing files and set up. That’s the hard part, how to create the files so the MPCNC can carve them. Maybe it would have to be six or eight-sided. to carve the faces easily.

    Not long ago someone was posting photos of flip carved little birds. I bet that’d be the same way you could do it. Maybe look in the “Stuff I’ve made” threads. It really wasn’t long ago at all. Weeks if that I think?

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