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Jack:

Yes, the 5volts shoudl bea good calibrator to get 10 volts out as that
would be the same as 100% PWM..

Art
www.artofcnc.ca

Hi:

Lets take these one at a time...

>

I got my steppers to work with Mach2, but I'm having
dificulty 'tuning' them for speed and distance (accuracy). The
motors are 1.8 deg/step, so thats 200 steps per rev. With a
leadscrew pitch of .0625 (1/16"), then my steps per unit (inch)
should be 200 X 16 = 3200 right?? My motors' shaft only turns a tiny
bit (~30 degrees) on a .0625" MDI move. If my math is correct, the
motor should turn a full revolution to get .0625" assuming a 1 to 1
direct drive of the leadscrew and 16 revs for a 1.000" move. What am
I doing wrong?

You must be using microstep drivers of some sort. Perhaps 10 uStep woudl
explain it. Then it woudl be 2000 * 16 = 32000 / inch/ This would also
explain the 30 (36?) degree movement for 1/16".

During velocity tuning it seems that the motors stutter a bit (no
load, just sitting on the bench) at high and at very slow speeds.

Its not good to tune motors with no load. Some drivers will jitter without
a damping force of some sort..

> believe stepper speed is directly relative to Voltage (of which I'm

definitely lacking). However, I'm not sure if I'm seeing lost steps,
or if there is a timing/signal problem keeping the motion from being
smooth and consistent. This could easily be a problem with my
drives/lack of voltage, but was curious if varying frequency timings
could cause this, see next question.

Yes, next question probably explains it..

I'm also curious about the frequency settings 25,000 khz, 45,000
khz etc... Considering my low performance stepper system, but fast
1.73Ghz CPU, what frequency should I be using? How do these
frequencies affect steppers max velocity, loosing steps/stalling
etc...? Or are the faster frequencies only for running high
performance systems capable of 100+ IPM??

35K and 45K modes are used by people who need higher speeds. In other
words , when they tune, the velocity is maxed and they'd like more.
Generally, unless your velocity is Maxed when tuning, stay at 25Khz, its
less of a drain on the Windows system.

Also, I noticed at

25,000khz the OCX driver test shows wildly varying numbers, mostly
much lower than 25,000khz. Do I have a Windows/motherboard/Mach2
driver problem or something or is this normal?

How wildly?? Generally, you should be around 25000, but only vary as much
as a hundred or so. If its going from 20,000 to 25000 for example, this is
too wild a swing and somethign is interfering.. This type of swing would
generally be an application, or a network card interrupting too much. Let me
know the swing your getting, it may point us somewhere...

Thanks,
Art

I have the same problem. Have tried every rotational diameter that I
can imagine.

--- In mach1mach2cnc@..., "barker806" <brian_barker@u...>
wrote:

Hello Art and others
I have had this problem for a long time (I thought it was my

machine)

but I have just set up an other machine. The problem that I am

having

is when I try to run the A axis (cutting text on a cyl.) the

stepper

is stalling out when a direction change is made. The axis moves

GREAT

with jogging. as a test I lowered the max speed and gave it a long
accel. this also did not work.

Thank you
Brian

I to have Same Problem see "Problem with Abit Board" I noticed when
testing if I start clicking and draging on screen about once per
second It crankes up to 77,000PPS wow! but is it real or is the
display just totaly screwed up? Art I tried the apic version setting
in bios nothing happened. But if the computer is busy doing something
PPS seams to jump right up there?

--- In mach1mach2cnc@..., "bartelian" <bartelian@y...>
wrote:

I just downloaded Mach2Mill and tried to configure it. The manual
says I should have about 24,600 Hz. My Puse Frequency starts high
but goes down to 1100-1200 Hz., the program will keep running (very
slowly) until the screen saver kicks in. Then when I hit a key to
return to the regular screen the P/Freq will go up to 25,500 Hz for
about 15 sec and then drop dramatically low again. I cannot

maintain

a consistant Pulse Freq. over about 1300 Hz.

I am running M2M Release 1.90 on a Compaq 2.6GHz, 512 Mb. So far I
checked to make sure Quicktime (Qtask.exe) is not installed, made
sure LAN is set to 100Mbps, disabled the screensaver, cleaned the
system with SpyBot, and started with a clean boot. So far nothing
works.

Thanks in advance for any help. The Program is just what I want,

but

don't know if it will work on my computer. Bill B

I've got something very strange going on. I have a BP clone that had
a Anilam crusader servo system on it. I replaced the crusader logic
stuff with 3 rutex 0-10v analog drives and Mach2. I'm still using
the glass scales as the encoders. I used the rutex tuning program
and have nice wave patterns with no over shoot. When I move the X
or Y axis the table stops on a dime. When I move the Z axis it seems
to over shoot by .010" and then slowly returns to where it is
supposed to be. The DRO readouts don't relect this change. If I use
the incremental jog and make a move as little as .0005 it still over
shoots by .010 I`ve tried messing around with the adjustments on
the rutex drive but I cant seem to get it to make any difference. Is
it possible I need to make an adjustment at the servo amp itself?
I'm not loosing any position on the axis.

Thanks
Derek

Hello Art and others
I have had this problem for a long time (I thought it was my machine)
but I have just set up an other machine. The problem that I am having
is when I try to run the A axis (cutting text on a cyl.) the stepper
is stalling out when a direction change is made. The axis moves GREAT
with jogging. as a test I lowered the max speed and gave it a long
accel. this also did not work.

Thank you
Brian

--- In mach1mach2cnc@..., Art <fenerty@a...> wrote:

Ross:

1) Try this in exact stop mode, does it still do it??
2) Try this in Plasma CV mode, how about now??

Thanks,
Art
www.artofcnc.ca

Exact stop fixed it, but the machine moves in small jerky movements
that shake my 2000lb router table.

Which version implements Plasma CV mode? I'm using Version 1.9 and
I don't see it.

Thanks...Ross

Hi Art
I emailed Vlad and he said that I should have revision 2 on the
firmware. I checked it with the rutex program and he's correct. He
also said that my drives should work with your tuning program. Is it
possible that because I'm using a PCI parallel port card it could be
causing the problem?

Thanks
Derek

I like it. It would solve the overwrite problem. The other option
it to make a copy of the macro and leave it in the Macro folder. Then when
you upgrade you only have to copy that macro back as M3 or M5, but the
separate folder would work much better.
Jim

Sure Ed here it is. I use it on my mill and engraver. I make some templates
for the pantograph guys. They need a reversed type to engrave in a mold for
plastic injection. I do it in DeskEngrave and save as a .dxf. Then into
autoCad and mirror it. Then to DeskKam and generate the Gcode. Not as big a
deal as it sounds. By the by DeskKam is a nice little simple CAM program.
Works well for 2.5d mill stuff. I have never been able to get anything for
my lathe out of it but maybe someday.



Scott

Scott Nelson
Pearland, Texas

Hi Art!

The HPGL imort seems to work fine for mee (even if its simple), it would
be great if you add pen to tool capability (when you have the time).
Thanks
Christer



-----Ursprungligt meddelande-----
Fr?n: Art [mailto:fenerty@...]
Skickat: den 22 februari 2004 22:50
Till: mach1mach2cnc@...
?mne: Re: [mach1mach2cnc] HPGL pen


Hi Christer:

Mach2's HPGL is very simply. It was meant as a simple import filter
for non-cam users. I never added Pen capability. I will add it to the
list. I have recently changed HPGL for version 4.0 so that it has a
"As-Drawn" as well as metric/english selections as well.

Thanks,
Art
www.artofcnc.ca






Yahoo! Groups Links

On Monday 23 February 2004 01:38, Donald Hansen wrote:

The only way that I am able to write a new macro is to load an
existing macro, delete its contents, write the new macro and save it
with a different name. Is it possible to use the Mach 2 editor to
write and save new macros?

I have a more fundamental problem with macros ... they keep getting
overwritten. Also .. I find the having 2 sets of them M5.tis M5.mis a bit
weird ... I'm forever editing the worng one .. what I think answers this
problem and neatens up the layout a bit is: use directories.

so ..

mach2/
macros/
mill/
M3
M5
etc
lathe/
M3
M5
etc
plasma/
M3
M5
etc
OEM/
etc

the machine XML file could specify which directory was to be used to look for
the macros, if you wanted to write some new ones and be sure they werent
over written when you upgraded then just create a new directory and tell
mach2 to use that. this woudl be especially useful for OEM's where I'd like
to send update CD's out, but I know that I have lots of modified macros and
they get over written ... there is now enough specialist macros kicking about
that some one is going to get bitten and losing code you have written really
sucks :)

I keep mentioning this idea ... I haven't had a comment from Art yet .. I
guess that means he don;t like it ;)

--
RapidCut CNC Technology

CNC Plasma Cutter

I got a problem like this after an M30 this WE but was not sure it was me or
a mach2 problem. It was a Z move at the beginning of the file (but i had no
Z move at the beginning of the program, just at the end).

Olivier.

Donald, in version 4.0 VBscript is in Radian (and i hope it will stay
because i wrote a big macro with it).

Olivier.

I have made the circuit in the files section to make 0-10 V Out from
the PWM voltage. Can I test with 5V in and adjust the output to 10V?
Can I use 12 V from the Computer or do I need a seperate supply. I
have one.
Thanks Again
Jack Hoffa

Hi Scott,

Do you have a URL to the site?


Best,

Ed Gilbert

Gilbert Engineered Systems
632 Warrenton-Embro Road
Macon, NC 27551
252-257-0539

Hello,
I'm new to this stuff so bear with me. I'm running a 1.73 Ghz AMD
XP2100 with WinXP and Mach2. I've also got an old, low performance
stepper kit from Super-tech. The control 'box' uses L298 chips for
stepper drivers (I think, definitely no Gecko's in there). My power
supply is a pitiful 12V 10amp, and my motors are Pac. Sci. ~200oz/in
bipolar I believe.

I got my steppers to work with Mach2, but I'm having
dificulty 'tuning' them for speed and distance (accuracy). The
motors are 1.8 deg/step, so thats 200 steps per rev. With a
leadscrew pitch of .0625 (1/16"), then my steps per unit (inch)
should be 200 X 16 = 3200 right?? My motors' shaft only turns a tiny
bit (~30 degrees) on a .0625" MDI move. If my math is correct, the
motor should turn a full revolution to get .0625" assuming a 1 to 1
direct drive of the leadscrew and 16 revs for a 1.000" move. What am
I doing wrong?

During velocity tuning it seems that the motors stutter a bit (no
load, just sitting on the bench) at high and at very slow speeds. I
believe stepper speed is directly relative to Voltage (of which I'm
definitely lacking). However, I'm not sure if I'm seeing lost steps,
or if there is a timing/signal problem keeping the motion from being
smooth and consistent. This could easily be a problem with my
drives/lack of voltage, but was curious if varying frequency timings
could cause this, see next question.

I'm also curious about the frequency settings 25,000 khz, 45,000
khz etc... Considering my low performance stepper system, but fast
1.73Ghz CPU, what frequency should I be using? How do these
frequencies affect steppers max velocity, loosing steps/stalling
etc...? Or are the faster frequencies only for running high
performance systems capable of 100+ IPM?? Also, I noticed at
25,000khz the OCX driver test shows wildly varying numbers, mostly
much lower than 25,000khz. Do I have a Windows/motherboard/Mach2
driver problem or something or is this normal?

Thanks for any help.

Andy:

, and it is sitting there with the disk

churning for 20 minutes now!

Kill it. Somethings wrong with the file. Or the type of HPGL or something.
Too many favours of all these laguage type. Open the HPGL in a word editor,
it shoudl be simple english, like

PU1650,4562;PD56423,234.22 ;LP

etc,.etc..


Art
www.artofcnc.ca

Get a copy of Deskengrave. It is freeware and turns true type into .dxf or
Gcode. Works very well and the price is right.

Scott

Scott Neldon
Pearland, Texas