- February 15, 2018 at 1:23 pm #53166
has anyone took it to the next level and added a 4th axis to mpcnc?
I am one of them, cant leave stuff alone kinda guys.
CBFebruary 15, 2018 at 1:48 pm #53169
SteveParticipantFebruary 15, 2018 at 2:48 pm #53171
nice, what firmware are you running for that one?
I have printed that centering chuck for a friend, they are abusers when they know you can make stuff. =PFebruary 15, 2018 at 5:50 pm #53180
Leo69 (V1 Hall of Flame member, for sure) made one, and a few others followed right away. It wasn’t as much a 4th axis as a rotational axis instead of the Y. You can connect the y axis to the rotational motor, then you need to make sure the machine moves right down the axis and your steps/mm are right for the radius of material you are working on. Then you can do things like carve into bats or something.February 15, 2018 at 5:56 pm #53181
So you would give up the y movement to it? or would it be extra axis?February 15, 2018 at 6:33 pm #53184
He gave up the Y.February 15, 2018 at 8:26 pm #53188
I watched another machine that had it off the main bed and had what looked like a lathe for a 4th. it looked crazy!
I am going to mod my mpcnc to increase some stuff. I ended up wanting to big of a work area and to tall to be able to clear different things.February 15, 2018 at 8:37 pm #53189
It is much better to make a drop table than a tall machine. Usually it serves the same function. Tall machines are not very fun.
1 user thanked author for this post.February 15, 2018 at 9:06 pm #53190
i made one for the current machine. it service the function of also leveling =P !!February 16, 2018 at 9:01 am #53200
I miss that drop table part or took it for something else. Are you talking about when it goes vertical or when the table is able to move up and down?February 16, 2018 at 9:18 am #53205
Rough example. You build a standard MPCNC with a 3.5″ Z reach, but you want to carve the top face of a 3′ log, you build a table that has a bed that can be adjusted down to accommodate. Not trying to make a powered bed, if that makes it more clear.February 16, 2018 at 1:46 pm #53219
SteveParticipantFebruary 16, 2018 at 3:46 pm #53231
Cool! That could definitely be done without a Y axis. Your drawing would just be the unrolled surface of the tube. The rotation would be set up so that 1mm of travel in Y would be 1mm on the surface of the tube.
1 user thanked author for this post.February 16, 2018 at 5:09 pm #53235
ok, i was tracking that way to drop the bed down but just wanted to make sure. that gun looks pretty damn good.February 17, 2018 at 4:55 pm #53290
Hello, Jeffeb3, can you please tell where i can find a tool that give me the right step/mm for the radius, and if I want to engrave with a diamant tool a glass of GIN that have a lot of diferent radius is the big one? I have mod all ready my mpCNC for now is a milldown machine, a 3D printer and a laser cutter/engraver, and i what use a lathe to do more stuff, if you can show me a tool to calculate the step/mm for radius i apprecheateFebruary 17, 2018 at 6:34 pm #53291
I don’t know of any tools for that. You won’t only have to adjust the steps/mm, you also have to raise the Z to match the radius.
I have seen Ryan cut a vinyl sticker and used glass etching to etch a pint glass.
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