JeffZ
04-05-2021, 11:52 AM
Alright, here we go.
I want to start off by thanking everyone. There is so much useful information on this forum, without which I wouldn't feel comfortable attempting such a complex and expensive project.
Goals:
This is a hobby machine, I do not intend to make money with it.
I really enjoy the process of learning, designing, building and improving a machine. For me, this process is half the fun of it.
I'll use the CNC as a tool to help with all sorts of DIY projects and hobbies.
Things like making electric guitars, small furniture, fancy signs, inlays, simrig components, backlit acrylic panels...
I will be working primarily in hardwood, plywood and hard plastics.
Occasionally, I'll want to do some light milling in aluminium. The aluminium plates needed for this projects are a good example (motor pockets, adapter plates etc).
My tools:
Tablesaw with a decent crosscut sled and a blade for cutting aluminium
Router table / handheld router
Drill press
Mpcnc
Drill press
I do not have access to anything capable of machining steel
Requirements:
Minimum work area: 800x600x80
Materials: hardwood, plywood, hard plastics, aluminium
Current design: (shows Nema34 motors and taper lock pulleys, other options listed below)
29900
Parts can be made using my limited toolset
Work Area: 1000x800x120
Footprint: 1300x1100x720 (fits neatly in the corner of my garage, and leaves just enough room for an enclosure)
Main Frame extrusions:
3x 160x80S
2x 80x80S
3x 80x40S
20mm Aluminium Plates (Red)
15mm Aluminium Plates (Yellow)
10mm Aluminium Plates (Green)
More Pictures:
29901298852988629887
X Axis
298882988929890
Y Axis
2989129892
Gantry
29893298942989529896298972989829899
Not shown are cable management, endstops, timing belt covers, enclosure, table etc...
I want to get the design more or less locked in before I continue on that path.
Making the parts:
I will order aluminium plates already milled flat (10mm, 15mm, 20 mm).
Most plates have 90° and 45° corners. Those I can cut to size on my tablesaw.
I'll use the mpcnc to mill the motor pockets and the holes needed to insert the FK/FF bearings.
The mpcnc will also function as a "cnc centre punch" to mark all holes to be drilled on the press.
Spindle
G-Penny 2.2kw water cooled + VFD
Linear Rails (from BST)
6x Hiwin HGR20
12x Hiwin HGH20CA
Ballscrews (from BST)
X axis: 1 x SFU2010 (~1320mm)
Y axis: 2 x SFU2010 (~1160mm)
Z axis: 1 x SFU1605 (~400mm)
Estimated motor / mass:
1 Z motor: 12.38kg (27.3lbs)
1 X motor: 22.96kg (50.62lbs)
2 Y motors: 65.79kg (145.04lbs) + ~5 liters of sand/epoxy mix to fill the X axis 160x80S extrusion
Motors I'm currently considering:
Lichuan
Nema24 LC60H2102 4.5Nm
Nema24 LC60H2127 5.5Nm
Unfortunately, shipping (for 4 motors) is ~180€ from the Lichuan aliexpress store.
Buying them locally is even worse, 800€ for 4 motors + drivers
Stepperonline
Nema34 Stepperonline Nema34 ~4.5Nm
Multiple choices with cheap shipping, but Nema34 might not be a good choice for my project
Drivers I'm currently considering:
Lichuan LCDA86H
Stepperonline CL86Y
Stepperonline CLA86T
HBS860H (these sketch me out because of how cheap they are...)
Belt drive:
HTD 5m closed loop timing belt
Motors will use standard BF keyway pulleys.
Ballscrew pulley types I'm currently considering:
Standard AF/BF pulleys with grub screws. (feels flimsy, might slip)
Clamp type BF pulleys (http://www.mycncuk.com/threads/14541-Are-taper-lock-pulleys-a-good-choice-for-ball-screws?p=124644#post124644) (could only find one seller, max 25 teeth with 15mm wide belt)
Taper lock pulleys (http://www.mycncuk.com/threads/14541-Are-taper-lock-pulleys-a-good-choice-for-ball-screws?p=124634#post124634) (heavy, min 32 teeth)
DIY taper lock pulleys (http://www.mycncuk.com/threads/14541-Are-taper-lock-pulleys-a-good-choice-for-ball-screws?p=124654#post124654) using ER collets.
Controller:
AXBB-E running UCCNC
Power supply:
230VAC -> VFD
230VAC -> 60VAC -> stepper drivers
None of this is set in stone. I'm not in a hurry, and no parts will be ordered until I'm satisfied with the design.
This is how far I've gotten on my own. I'd really appreciate any critique / comments / suggestions / advice.
Thanks,
Jeff
I want to start off by thanking everyone. There is so much useful information on this forum, without which I wouldn't feel comfortable attempting such a complex and expensive project.
Goals:
This is a hobby machine, I do not intend to make money with it.
I really enjoy the process of learning, designing, building and improving a machine. For me, this process is half the fun of it.
I'll use the CNC as a tool to help with all sorts of DIY projects and hobbies.
Things like making electric guitars, small furniture, fancy signs, inlays, simrig components, backlit acrylic panels...
I will be working primarily in hardwood, plywood and hard plastics.
Occasionally, I'll want to do some light milling in aluminium. The aluminium plates needed for this projects are a good example (motor pockets, adapter plates etc).
My tools:
Tablesaw with a decent crosscut sled and a blade for cutting aluminium
Router table / handheld router
Drill press
Mpcnc
Drill press
I do not have access to anything capable of machining steel
Requirements:
Minimum work area: 800x600x80
Materials: hardwood, plywood, hard plastics, aluminium
Current design: (shows Nema34 motors and taper lock pulleys, other options listed below)
29900
Parts can be made using my limited toolset
Work Area: 1000x800x120
Footprint: 1300x1100x720 (fits neatly in the corner of my garage, and leaves just enough room for an enclosure)
Main Frame extrusions:
3x 160x80S
2x 80x80S
3x 80x40S
20mm Aluminium Plates (Red)
15mm Aluminium Plates (Yellow)
10mm Aluminium Plates (Green)
More Pictures:
29901298852988629887
X Axis
298882988929890
Y Axis
2989129892
Gantry
29893298942989529896298972989829899
Not shown are cable management, endstops, timing belt covers, enclosure, table etc...
I want to get the design more or less locked in before I continue on that path.
Making the parts:
I will order aluminium plates already milled flat (10mm, 15mm, 20 mm).
Most plates have 90° and 45° corners. Those I can cut to size on my tablesaw.
I'll use the mpcnc to mill the motor pockets and the holes needed to insert the FK/FF bearings.
The mpcnc will also function as a "cnc centre punch" to mark all holes to be drilled on the press.
Spindle
G-Penny 2.2kw water cooled + VFD
Linear Rails (from BST)
6x Hiwin HGR20
12x Hiwin HGH20CA
Ballscrews (from BST)
X axis: 1 x SFU2010 (~1320mm)
Y axis: 2 x SFU2010 (~1160mm)
Z axis: 1 x SFU1605 (~400mm)
Estimated motor / mass:
1 Z motor: 12.38kg (27.3lbs)
1 X motor: 22.96kg (50.62lbs)
2 Y motors: 65.79kg (145.04lbs) + ~5 liters of sand/epoxy mix to fill the X axis 160x80S extrusion
Motors I'm currently considering:
Lichuan
Nema24 LC60H2102 4.5Nm
Nema24 LC60H2127 5.5Nm
Unfortunately, shipping (for 4 motors) is ~180€ from the Lichuan aliexpress store.
Buying them locally is even worse, 800€ for 4 motors + drivers
Stepperonline
Nema34 Stepperonline Nema34 ~4.5Nm
Multiple choices with cheap shipping, but Nema34 might not be a good choice for my project
Drivers I'm currently considering:
Lichuan LCDA86H
Stepperonline CL86Y
Stepperonline CLA86T
HBS860H (these sketch me out because of how cheap they are...)
Belt drive:
HTD 5m closed loop timing belt
Motors will use standard BF keyway pulleys.
Ballscrew pulley types I'm currently considering:
Standard AF/BF pulleys with grub screws. (feels flimsy, might slip)
Clamp type BF pulleys (http://www.mycncuk.com/threads/14541-Are-taper-lock-pulleys-a-good-choice-for-ball-screws?p=124644#post124644) (could only find one seller, max 25 teeth with 15mm wide belt)
Taper lock pulleys (http://www.mycncuk.com/threads/14541-Are-taper-lock-pulleys-a-good-choice-for-ball-screws?p=124634#post124634) (heavy, min 32 teeth)
DIY taper lock pulleys (http://www.mycncuk.com/threads/14541-Are-taper-lock-pulleys-a-good-choice-for-ball-screws?p=124654#post124654) using ER collets.
Controller:
AXBB-E running UCCNC
Power supply:
230VAC -> VFD
230VAC -> 60VAC -> stepper drivers
None of this is set in stone. I'm not in a hurry, and no parts will be ordered until I'm satisfied with the design.
This is how far I've gotten on my own. I'd really appreciate any critique / comments / suggestions / advice.
Thanks,
Jeff