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I don't know where to find the gears, but another option is open- end
timing belts, such as found in catalog page
929.


--- In mach1mach2cnc@..., "kepello" <carl@c...> wrote:

Only the smaller routers tend to use leadscrew. Use rack and

pinion.

You wouldn't have a reasonably priced source of rack and pinion

part

would you. I have been unable to find one for a router that I am
building...

Thanks!
Carl

Only the smaller routers tend to use leadscrew. Use rack and

pinion.

You wouldn't have a reasonably priced source of rack and pinion part
would you. I have been unable to find one for a router that I am
building...

Thanks!
Carl

It also makes me not to
inclined to walkaway from the machine since one time (and only once)
it did it in the middle of a cut...just enough to make me really
nervous.

Couldn't agree more. One of the things that make this cnc machine work so well in
my one man shop is that I can be doing something else while it does it's thing. Other
than the missed step thing on the Z yesterday, it hasn't messed up during a run, but
then, I havn't done much with it since I installed 4.0 either.

Ross

Tom

Send me a DXF off list and I will import and
Post process it for you for mach2.

michael

Tom

If you have Dolphin you can use the post
processor to disable ARC output and replace them
with a series of cut vectors, length of vectors can
be controlled by setting an Arc Tolerance within
Dolphin.
Dolphin works to double precision so you
Should be able to produce very small vectors.

Regards

Michael
Dolphin Cad Cam Systems Ltd

Gentlemen,

I am trying to set up Mach2 to mill some VERY tiny parts. Some of
the arcs have radii of .08 mm. In the tool path display, the
displayed contour shows the arcs to be broken into very large chords,
resulting in a small arc sometimes only having 3 chords in it. I
need to have these arcs cut with chords placed around every 5 degrees
of the arc.

Is it possible to change the chord size Mach2 cuts in for these small
arcs or is this beyond the capablility of the software?

My motors turn at 8000 steps per rotation (2000 line encoders) and
the ball screw pitch is 2 millimeters per rotation, so I have the
mechanical resolution to do these cuts. I just need the cnc control
to have the resolution.

Tom Eldredge

i need to build a hot wire machine, this is 2 axis x,y, and a 3th
axis (rotative ) the intention for this rotative axis is to make
parts like screws, so i need advice in software to generate this kind
of 3d in g-code, and the conections in mach2


tanks in advance

antonio ruiz

Ross, Thanks for the reply. At least I haven't lost my mind and
just imagined the problem. I can run several parts with no problem
then bingo, there it is. It's somewhat of a PITA to have to reset
the software and re-zero the machine. It also makes me not to
inclined to walkaway from the machine since one time (and only once)
it did it in the middle of a cut...just enough to make me really
nervous.

TOM C


--- In mach1mach2cnc@..., "rrc62_03782" <rrc62@a...>
wrote:

I saw something similar with 4.0. I don't know if it's 4.0a. I

downloaded and installed

it about 2 weeks ago. All of a sudden the machine just would not

move. Jog didn't

work and part programs would not run. The DRO's were moving, but

the machine

was not. I re-booted and everything started working normally.

This has happened

twice, but never happens during a program run. It only seems to

happen when I'm

jogging manually or switching between screens.

I also had an issue yesterday where I was cutting many identical

parts in a fixture.

After I got the part zero issue worked out and started running

parts, I had a prblem

with the second part. Toward the end of the program, the Z started

creeping up

slowly. At the end of the program, Z was just slightly below zero

when it should have

been at .050 or so. I loaded a new blank, re-zeroed the machine

and the other parts

cut with no problem.

Ross

I am seeing some really strange occurances with MACH2 4.0a. I
upgraded from RC 5 to 3.X and the CV thing caused jerky

movements.

Art made it so we could turn off the angle discrimination in CV

with

4.0a which took me back to nice smooth full speed movements. Now
with 4.0a in place I get intermittent problems with the pulse
engine. I can run a job perfect then move the head to load

material

or just sometimes walk away from the machine for a few minutes of
sitting still (no DC on the motors) and it goes into a semi-

frozen

state on movement. There are no errors, no e-stop, and all screen
functions appear normal but it refuses to move (no jog or program

or

MDI response) and nothing you do will change that. It almost acts

as

if the unit is in the state where the MDI screen has focus and no
other movement is allowed. To further the mystery sometimes if

you

try to jog or do an MDI command (with or without feedrate

command)

the table will start to move ever so slow at about 2 IPM and the
DRO's will track. The speed DRO shows 2 instead of the 160 the
velocity is set for. Stop, Rewind, Run all work but change

nothing.

Only cure is to close MACH2 and reopen (loosing position info)

and

then it's happy for a while.

I am suspecting something with the computer itself but I hate to
start ripping the PC apart if it is software. Nothing has

changed in

the PC setup from previous versions. This is a WIN2000 machine

and I

have done a manual install of the MACH2 driver twice to eliminate

the

possibility of multiple versions of the MACH2 Driver being

defined.

Nothing is running in the background but bare services and the

NIC

(set to manual 100 mb half duplex).

The reason for the post is to see if anybody has ever seen this
problem on any version. My next step is to swap out the

dedicated PC

running the table.

BTW this is a plasma app and I use the THC function at all

times. I

don't know if that has anything to do with it, although I have

tried

turning off the THC enable between runs and the problems still

occurs.

What a time for Art to be in Mexico! Oh well, he deserves it,

but

Murphy's Law will rear it's ugly head.

Tom C

I saw something similar with 4.0. I don't know if it's 4.0a. I downloaded and installed
it about 2 weeks ago. All of a sudden the machine just would not move. Jog didn't
work and part programs would not run. The DRO's were moving, but the machine
was not. I re-booted and everything started working normally. This has happened
twice, but never happens during a program run. It only seems to happen when I'm
jogging manually or switching between screens.

I also had an issue yesterday where I was cutting many identical parts in a fixture.
After I got the part zero issue worked out and started running parts, I had a prblem
with the second part. Toward the end of the program, the Z started creeping up
slowly. At the end of the program, Z was just slightly below zero when it should have
been at .050 or so. I loaded a new blank, re-zeroed the machine and the other parts
cut with no problem.

Ross

--- In mach1mach2cnc@..., Robin Szemeti <list@r...> wrote:

On Wednesday 10 March 2004 03:06, dlandgl2003 wrote:

I am having a problem with moving around a part on my table. Instead
of the coordinates always being 0,0. Any ideas?

Read the manual pages on the G92 command.

You should also perhaps look at the 'fixtures' table and the G54/G55 commands

All this is in the manual

I had this exact same problem yesterday. I was cutting parts in a fixture and every
time the program ended, it would send the tool to the part zero but it set the DRO's
to something not even close.

I went into the logic screen and unchecked everything in the "Do this at M30" box
except the one labeled "turn off all outputs". This fixed the problem. Now the tool
goes to part zero and the DRO's agree. I'm not sure which check box was causing the
problem. You could uncheck them one at a time until the problem goes away.

Ross

Gentlemen:

I am seeing some really strange occurances with MACH2 4.0a. I
upgraded from RC 5 to 3.X and the CV thing caused jerky movements.
Art made it so we could turn off the angle discrimination in CV with
4.0a which took me back to nice smooth full speed movements. Now
with 4.0a in place I get intermittent problems with the pulse
engine. I can run a job perfect then move the head to load material
or just sometimes walk away from the machine for a few minutes of
sitting still (no DC on the motors) and it goes into a semi-frozen
state on movement. There are no errors, no e-stop, and all screen
functions appear normal but it refuses to move (no jog or program or
MDI response) and nothing you do will change that. It almost acts as
if the unit is in the state where the MDI screen has focus and no
other movement is allowed. To further the mystery sometimes if you
try to jog or do an MDI command (with or without feedrate command)
the table will start to move ever so slow at about 2 IPM and the
DRO's will track. The speed DRO shows 2 instead of the 160 the
velocity is set for. Stop, Rewind, Run all work but change nothing.
Only cure is to close MACH2 and reopen (loosing position info) and
then it's happy for a while.

I am suspecting something with the computer itself but I hate to
start ripping the PC apart if it is software. Nothing has changed in
the PC setup from previous versions. This is a WIN2000 machine and I
have done a manual install of the MACH2 driver twice to eliminate the
possibility of multiple versions of the MACH2 Driver being defined.
Nothing is running in the background but bare services and the NIC
(set to manual 100 mb half duplex).

The reason for the post is to see if anybody has ever seen this
problem on any version. My next step is to swap out the dedicated PC
running the table.

BTW this is a plasma app and I use the THC function at all times. I
don't know if that has anything to do with it, although I have tried
turning off the THC enable between runs and the problems still occurs.

What a time for Art to be in Mexico! Oh well, he deserves it, but
Murphy's Law will rear it's ugly head.

Tom C

Here is a 5 axis system.

Here are some software that may be useful


I think this may solve the right button mouse problem.
Richard Konnen

On Wednesday 10 March 2004 05:01, jasonjet25 wrote:

I want the
table to be about 4'x8' and I am not sure about the Z axis. I hope
to get about 3' but am aware this might be a bit much++.

thata BIG Z axis .. you wouls need a VERY rigid structure to support that,
the only routers I have seen with a 3' (thats about 1000mm ?? ) Z axis have
always been large, cast iron structures. Always use the minimum Z axis you
can get away with, If your biggest piece of material is 200mm use a 205mm Z
axis ... maybe you can place bigger pieces inside the bed, so only the top
200mm shows, or cut each slab of faom/wood separately and then stack them
afterwards. Witha well designed router, you could be lookign at tolerances of
0.005" with a small Z axis, so they will stack just fine. Anyway, a 3 foot Z
axis would be a major technical challenge. Waving a router around on the end
of a 3 foot arm is not going to produce good results unless it is VERY stiff
.. and remember, you need another 3 foot of track above the router for when
it is lowered, plus the distance between the Z axis carriages .. you are
talkign about 7 or 8 feet of guide rail on the Z axis ... thats not going to
fly.

The Z axis should always be the MINIMUM you can get away with, if the biggest
thing you will machine is 100mm, use a 105mm Z axis .. You can failry simply
increase the length of a router without trouble, you can add to the width
with only a little more trouble and a bit of strengthening, but Z axis is
whole different matter, much above 200mm the engineering becomes
significant. If theres is any significant flexibility in the Z axis, the
router will tend to 'climb' into the wood if it gets chance, each rotation
taking a biger bite of the wood, flexing the Z axis more .. taking a bigger
bite .. al of a sudden you are looking at a bent and twisted machine :(

That reminds me .. I saw some pictures of a pool cue engraving machine on
the net once ... a pool cue is what? 30mm dia and this thing had at least
400mm of Z axis ... not sure what all that was about.

Again any
input would be nice. I plan to use welded aluminum square tubing

Why not use steel tube? cheaper, easier to weld, etc

and
the standard lead screw configuration unless talked into something
else.

Only the smaller routers tend to use leadscrew. Use rack and pinion.
l;eadscrews on an 8 foot bed will become troublesome. they need to be quite
thick if they are not going to flap about when spun. Most/all the larger
routers use rack and pinion, its cheaper too. For an 8 foot bed, you would
need 25mm or more dia leadscrews ...

The tolerance is acceptable to about 1/10th inch or better.

That should be easy ... 0.01 should be possible without too much trouble

--
RapidCut CNC Technology

CNC Plasma Cutter

On Wednesday 10 March 2004 03:08, dlandgl2003 wrote:

I am using Autocad 2000 as my drawing package. I ddraw a circle, but
the export in DXF doesn't work to connect all the lines.

umm .. a circle is only one line, how can it not be 'connected'

There must
be a way to make the arcs and curves join.

curves? .. are you using bezier curves? if so thes are not supported by the
DXF convertor. you will have to use multiple small straight line segments.

Any ideas?

lots.

Yahoo! Groups Links

--
RapidCut CNC Technology

CNC Plasma Cutter

On Wednesday 10 March 2004 03:06, dlandgl2003 wrote:

I am having a problem with moving around a part on my table. Instead
of the coordinates always being 0,0. Any ideas?

Read the manual pages on the G92 command.

You should also perhaps look at the 'fixtures' table and the G54/G55 commands

All this is in the manual

Yahoo! Groups Links

--
RapidCut CNC Technology

CNC Plasma Cutter

--- In mach1mach2cnc@..., "harry32002001" <harry320@c...>
wrote:

Group

Does anyone have any experience using a touch screen overlay or a
touch screen LCD with Mach2? The overlays are less than $200. the
LCD well there up there!!

I've been playing with three different touchscreens using Mach2. One
is a 17" CRT with a MagicTouch 4-wire resistive touch surface, one is
a TFT SVGA with inbuilt ELO 5-wire resistive touch glass, and the
third one is a 9.4" TFT VGA that I upgraded to mouseless operation
with a 10.2" ELO 5-wire touch glass. For a machine shop environment
I've added an additional mylar film in front of the small touch
screen in order to protect the plastic touch surface - it's easier
and above all cheaper to replace than the expensive touch glass.

All of them work well with Mach2, but it is quite essential to
customize the screen layout and make all the needed buttons big
enough. In my opinion the 5-wire touch screens are more precise and
hold their calibration better that the cheaper 4-wire ones. There are
also capacitive touch screens, but you can't use them with any other
device but a bare human finger. The resistive ones are pressure
sensitive, so they work even with gloves.

One drawback is the general lack of the right mouse button, but you
can always butcher a mouse for its electronics and wire the two or
three mouse buttons to external buttons, mounted close to the screen
at your machine control panel. That way you won't have to have a
normal mouse or trackball at all at your Mach2 machine tool.


Cheers,

Vesa

Hello everyone, I am a new member of your group looking for some
info. I am gathering knowledge to build a somewhat large 3 axis
router and I welcome any advice. I want to build a 5 axis but it
doesnt look like any one else is building them so I gather it is not
practicle for a home builder? The purpose, for me, is to cut hard
foam and soft wood into molds. I have no intention or need to cut
anything heavier that about 20lbs density(soft pinewood). I want the
table to be about 4'x8' and I am not sure about the Z axis. I hope
to get about 3' but am aware this might be a bit much++. Again any
input would be nice. I plan to use welded aluminum square tubing and
the standard lead screw configuration unless talked into something
else. The tolerance is acceptable to about 1/10th inch or better.
The biggest problem for me (in forsight) is the software as I have no
real experiance with CAD other G-code type programs. I am a good
study however I know that this is a big task.

Your assistance is appreciated and critisism welcome

Jason

I just bought a used elo 15" LCD with touchscreen on ebay for $280 +
$35 shipping.

I just got it today, and hooked it up and tried it out a few minutes
ago, and it seems to work fine, except I can't access the Onscreen
setup menus. It says "OSD MAIN MENU LOCKED" when I try to access
them. But it seems to be setup ok at least for my system.

It is actually an older Philips monitor, the model is 15L5082Q11
(shown in the ad) or 15L510 0Q11(what I actually received).

Max resolution is 1024 x 768 @ 75Hz, and the screen actually
measures just a hair over 15" diagonally.

Being an older model, the mouse hookup is "serial", as opposed to
USB. I downloaded the latest driver form elo's web site, and it
works fine.

There are also speakers and a mic built in to the monitor, if that
is an advantage to anyone.

The seller, "gler1", has a whole bunch of these listed at the buy it
now price of $280, which I thought was pretty good.

I have no affiliation with them, other than being a happy customer!

Andy Wander


--- In mach1mach2cnc@..., "Ed Gilbert" <co2man@n...>
wrote:

Hi Harry,

I do not know about the overlays screens but I use ELO systems

touch screens

with out any problems. I have tried the serial and USB and both

are fine.

The only drawback with the ELO is not having a pop up keyboard

built into

the driver for data input. You can load the onscreen keyboard in

Windows to

allow data input. You just have to min-max it when you need it.


Best,

Ed Gilbert

I am using Autocad 2000 as my drawing package. I ddraw a circle, but
the export in DXF doesn't work to connect all the lines. There must
be a way to make the arcs and curves join. Any ideas?