[attachment 1144 PhoeBot_V2.jpg] Please take a look at my design, It's taken from commercially available linear positioning systems, and is fully modular and relatively cheap. Using 3 bipolar stepper motors in a https://reprap.org/forum/read.php?14,17963,17963#msg-17963 Thu, 05 Mar 2026 09:59:40 -0500 Phorum 5.2.23 https://reprap.org/forum/read.php?14,17963,18168#msg-18168 https://reprap.org/forum/read.php?14,17963,18168#msg-18168
Demented]]> Demented Chihuahua Mechanics Wed, 29 Oct 2008 11:25:47 -0400 https://reprap.org/forum/read.php?14,17963,18160#msg-18160 https://reprap.org/forum/read.php?14,17963,18160#msg-18160
'sid]]> sid Mechanics Tue, 28 Oct 2008 21:35:09 -0400 https://reprap.org/forum/read.php?14,17963,18149#msg-18149 https://reprap.org/forum/read.php?14,17963,18149#msg-18149 Here is how I solved this problem. [repstrapbertha.blogspot.com]]]> BodgeIt Mechanics Tue, 28 Oct 2008 18:57:09 -0400 https://reprap.org/forum/read.php?14,17963,18091#msg-18091 https://reprap.org/forum/read.php?14,17963,18091#msg-18091 Al on Al, BAD.
Guideing Rods, GOOD.

(:P)

I'll see what else I can come up with for V3.

Thanks for all your help.]]> Pheobot Mechanics Mon, 27 Oct 2008 00:30:33 -0400 https://reprap.org/forum/read.php?14,17963,18086#msg-18086 https://reprap.org/forum/read.php?14,17963,18086#msg-18086
Hi, friend folks need to build the printer to make solid designs, I can help, as comienzzo, Thanks]]> maximo Mechanics Sun, 26 Oct 2008 23:05:51 -0400 https://reprap.org/forum/read.php?14,17963,18069#msg-18069 https://reprap.org/forum/read.php?14,17963,18069#msg-18069 Forrest Higgs Mechanics Sat, 25 Oct 2008 23:24:13 -0400 https://reprap.org/forum/read.php?14,17963,18068#msg-18068 https://reprap.org/forum/read.php?14,17963,18068#msg-18068 The aluminium L shape extrusion you can buy at the hardware store here are known not to be perfectly straight sometimes.
So check twice ;)

Did I see correct.. no guideing rods.. just the L-shapes?
Do you intend to grease or do you have some sort of ptfe foil material to make it slide easily?

'sid]]> sid Mechanics Sat, 25 Oct 2008 18:10:02 -0400 https://reprap.org/forum/read.php?14,17963,18007#msg-18007 https://reprap.org/forum/read.php?14,17963,18007#msg-18007 Pheobot Mechanics Thu, 23 Oct 2008 18:40:26 -0400 https://reprap.org/forum/read.php?14,17963,17986#msg-17986 https://reprap.org/forum/read.php?14,17963,17986#msg-17986 I'd go for six skatebearings and two aluminium angles of ~130]]> sid Mechanics Thu, 23 Oct 2008 06:25:12 -0400 https://reprap.org/forum/read.php?14,17963,17977#msg-17977 https://reprap.org/forum/read.php?14,17963,17977#msg-17977
[3dreplicators.com]

Here you see the x-axis mounted on the y-axis forming an xy printing plane. The z-axis is mounted on a cross-bar gantry and carries the extruder.

[4.bp.blogspot.com]]]> Forrest Higgs Mechanics Wed, 22 Oct 2008 21:11:28 -0400 https://reprap.org/forum/read.php?14,17963,17976#msg-17976 https://reprap.org/forum/read.php?14,17963,17976#msg-17976
But if I slightly Mix V2.0 and 2.1, this will mean I only have to add another x-axis, and not another z.

[attachment 1147 PhoeBot_V2.2.jpg]

I think I'll add a rail system for the other x-axis. using 4 skate bearings and a "T" shaped piece of aluminium.]]> Pheobot Mechanics Wed, 22 Oct 2008 20:44:23 -0400 https://reprap.org/forum/read.php?14,17963,17975#msg-17975 https://reprap.org/forum/read.php?14,17963,17975#msg-17975
The rods in the rendering are much longer than in the final cartesian.
they are 600mm long on x and 450 on y) the final cartesian is more likely 450 x 350 for x and y because they're only 10mm in diameter.
but the longer rods make a much more elegant picture for a rendering ;)
for the same reason I didn't show the baseplate motors stabilizers threaded rods (well they take too long to render because they are threaded not only bumpmapped)
and some other minor parts.
If I'd go for a size like that I'd upgrade the rods to 16mm at least ...
especially for enough rigidity to do some minor milling too ;)
But let's not talk about that one here, I just wanted to show how close the sketchup rendering is to a inventor rendering that's all ;)

But I'm sure we will find the time to talk about my cartbot some other day ;)

'sid

ps and now, its 2:30 am and my eyes start to drift off. gn8 everyone]]> sid Mechanics Wed, 22 Oct 2008 20:34:41 -0400 https://reprap.org/forum/read.php?14,17963,17974#msg-17974 https://reprap.org/forum/read.php?14,17963,17974#msg-17974 Forrest Higgs Mechanics Wed, 22 Oct 2008 20:16:07 -0400 https://reprap.org/forum/read.php?14,17963,17973#msg-17973 https://reprap.org/forum/read.php?14,17963,17973#msg-17973
as soon as you lift the zAxis the yAxis will surely tilt.
No matter what kind of frame you have you'll need a guided support on the "free end".

And even worse than that as soon as you move the xAxis the guides have to move too, therefore you need a second xAxis (both the second x and the second z don't have to have a stepper they can be moved by belts for example)

I can't imagine how your frame would look like to support that layout.

Just take a look at nopheads hydraraptor and see how he mounted the parts
(x and y are sled to sled connected afair)
Or take a look at some cnc portal mills (most commercial cnc mills are portals)
See how they are constructed and let the inspiration do the rest ;)

'sid
And for comparance:
my layout (rendered with inventor9, see.. not much difference //backgroundcolour is a matter of preference)
[attachment 1146 repstrap-uiv.jpg]]]> sid Mechanics Wed, 22 Oct 2008 19:57:37 -0400 https://reprap.org/forum/read.php?14,17963,17971#msg-17971 https://reprap.org/forum/read.php?14,17963,17971#msg-17971
Could you please explain...
thanks]]> Pheobot Mechanics Wed, 22 Oct 2008 19:43:17 -0400 https://reprap.org/forum/read.php?14,17963,17970#msg-17970 https://reprap.org/forum/read.php?14,17963,17970#msg-17970 If you add a second zAxis it'd be fine ;)
That way you not only need static support but a second zAxis.
And because the zAxis is mounted on the xAxis.. another one of that too :(

Those modules are very nice but connecting all three together is not that a good idea.
Mount all on one frame but independently (connect just x and y or y and z)

take a look at hydraraptor, nophead uses modules like that for example.
That's a good layout (the frame could be stiffer, but who cares)

'sid

ps google sketchup? wow pretty close to the output of inventor (not regarding the workflow nor interface and such just the result I can see here)]]> sid Mechanics Wed, 22 Oct 2008 19:36:29 -0400 https://reprap.org/forum/read.php?14,17963,17969#msg-17969 https://reprap.org/forum/read.php?14,17963,17969#msg-17969 Forrest Higgs Mechanics Wed, 22 Oct 2008 19:35:09 -0400 https://reprap.org/forum/read.php?14,17963,17968#msg-17968 https://reprap.org/forum/read.php?14,17963,17968#msg-17968
[attachment 1145 PhoeBot_V2.1.jpg]

Thanks sid, you were right about the z-axis.
how about this one then?

Anthony]]> Pheobot Mechanics Wed, 22 Oct 2008 19:27:13 -0400 https://reprap.org/forum/read.php?14,17963,17967#msg-17967 https://reprap.org/forum/read.php?14,17963,17967#msg-17967 Pheobot Mechanics Wed, 22 Oct 2008 19:20:16 -0400 https://reprap.org/forum/read.php?14,17963,17964#msg-17964 https://reprap.org/forum/read.php?14,17963,17964#msg-17964 but with that alone you can't do the job.
You have to built a frame that lifts the x-axis to have the vertical movement BELOW the z Axis not above (where it is at the very moment),
then you'll figure that you have a serious problem with a tilting y-Axis what makes you come to the conclusion that you need to have support on both ends of the y-Axis.

And you'll end up with something completely different again ;)

'sid

btw, is that the new autodesk inventor?]]> sid Mechanics Wed, 22 Oct 2008 19:12:27 -0400 https://reprap.org/forum/read.php?14,17963,17963#msg-17963 https://reprap.org/forum/read.php?14,17963,17963#msg-17963
Please take a look at my design, It's taken from commercially available linear positioning systems, and is fully modular and relatively cheap. Using 3 bipolar stepper motors in a ]]> Pheobot Mechanics Wed, 22 Oct 2008 18:59:44 -0400