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Do the RC motor controllers use 1mS as off and 2ms full throttle, or
1.5mS is
off, 2mS is full throttle, and 1mS is full reverse.

As I understand, a connection to the servo , or motor controller is

wire connector, Gnd, +5V and the control signal. For the motor
controllers,
how much current does the +5V connector draw? For a standard servo,

supplies the servo power. For a motor controller, my guess is that it
supplies
only a reference or just small amount for the logic circuitry.

Hi Manu,

I've had a look and I'm fairly sure that I can get the DigiSpeed-XL produce an RC signal that should work fine. I can add it as a mode selected by the mode jumpers.

I have a question. Normally a pulse of 1.5ms centres the RC servo. 2mS is full CW. 1mS is full CCW.

Do the RC motor controllers use 1mS as off and 2ms full throttle, or 1.5mS is off, 2mS is full throttle, and 1mS is full reverse.

Hi:

Is the msconfig/startup table empty completely?


Thanks,
Art
www.artofcnc.ca

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----- Original Message -----
From: "elaurijsen" <elaurijsen@...>
To: <mach1mach2cnc@...>
Sent: Friday, June 02, 2006 8:03 PM
Subject: [mach1mach2cnc] Driver problem new computer

Hi all,

I just bought a new computer for Mach3: Pentium 4 3.0 GHz HT with 512
Mb ram. I have installed Windows XP (as a standard pc, so disabled

The LPT-port is running on 378 (=standard value)
When i run the drivertest, i get only a APIC timing constant of 50
and no pulses at all! Also i tried installing Mach2 but got the same
results...
In Device manager the pulse engines for Mach3 and Mach2 are running
correct according to Windows...

I tried disabling Hyperthreading with no result.
I tried setting the LPT-port to output only with no result.

Does someone knows what can be wrong. On my older pc everthing did run
very well (only too slow)... but it was only a Pentium 3 733 MHz...

Does anybody know what to do now?
The computer is a brandnew modern pc so that should be no problem

Thanks for your help,

Eric








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Spent some time yesterday playing with a TaigCNC machine and comparing
Mach3 with the DOS package that normally drives it. The original control
program is running on an old machine that would probably not even load
W2k so I had taken along an ITX box with W2k already installed. Only
problem is that it is an 800MHz C3 processor, but since this is intended
to be an embedded computer to go with the machine nothing else was
installed on it.

Is this likely to be due to the fact that the processor is not fast
enough?

Right guys ( and galls? )

Spent some time yesterday playing with a TaigCNC machine and comparing Mach3 with the DOS package that normally drives it. The original control program is running on an old machine that would probably not even load W2k so I had taken along an ITX box with W2k already installed. Only problem is that it is an 800MHz C3 processor, but since this is intended to be an embedded computer to go with the machine nothing else was installed on it.

--- In mach1mach2cnc@..., Lester Caine <lester@...> wrote:
<snip>
Even slowing things down,

running just 25kHz and slower feed rates we have a decided 'pattern' to the noise from the stepper, like something is sticking every couple of seconds, while the DOS has none even at a faster rate.

Is this likely to be due to the fact that the processor is not fast enough?

I would suspect a periodis Tick in motion is Etherner card set to autonegoitiate 10/100. Try setting it to 10.

What *IS* the slowest processor speed that will work cleanly - or is the less than smooth pulse generation a 'facet' of using windows?

No you can get immaculate results 1000s of users demonstrate that.

Given the quality of work that the machine CAN produce, any pattern to the axis movement is likely to affect the surface finish.

Processor speed not likely to affect finish etc. If you run out of cycle then it all chokes up. GUI goes slow (or stopped).

1 GHZ is certainly OK for me but struggles running Modbus and a big Macropump.

Have you checked the parallel port output voltage? A lot of laptops and modern desktops now seem to put out only 3.8V instead of the 5V your driver board probably needs.

running just 25kHz and slower feed rates we have a

the noise from the stepper, like something is sticking every couple

seconds, while the DOS has none even at a faster rate.

Is this likely to be due to the fact that the processor is not fast
enough?

the slowest processor speed that will work cleanly - or is the less

smooth pulse generation a 'facet' of using windows?

Given the quality of
work that the machine CAN produce, any pattern to the axis movement

likely to affect the surface finish.

Right guys ( and galls? )

Spent some time yesterday playing with a TaigCNC machine and

Mach3 with the DOS package that normally drives it. The original

program is running on an old machine that would probably not even

W2k so I had taken along an ITX box with W2k already installed.

problem is that it is an 800MHz C3 processor, but since this is

to be an embedded computer to go with the machine nothing else was
installed on it.

Operation from the DOS program is smooth and clean, but running

tests in Mach3 give a number of problems. Even slowing things

running just 25kHz and slower feed rates we have a

the noise from the stepper, like something is sticking every

seconds, while the DOS has none even at a faster rate.

Is this likely to be due to the fact that the processor is not

enough? Neither of my laptops have parallel ports, so I could not

them up, and the desk machines are rack mounted, so until I can

machine over here it's difficult to try a faster processor. What

the slowest processor speed that will work cleanly - or is the

smooth pulse generation a 'facet' of using windows? Given the

work that the machine CAN produce, any pattern to the axis

likely to affect the surface finish.

Ideally I would like to include a 1.2 or 1.5Ghz ITX based

each machine but I am wondering if that will work, or if I am

just running DOS and leaving Mach until the G100 or something

a cost effective alternative :(

I will leave the other problems until I can run things with a

processor ;)

--
Lester Caine - G8HFL
-----------------------------
L.S.Caine Electronic Services -
Model Engineers Digital Workshop -

Treasurer - Firebird Foundation Inc. -

Just forgot to say that i installed the newest version of Mach3 and
Mach2...
An i have a onboard videocard... could that be a problem?

Seeing how i haven't asked any stupid questions for a while, i thought
it was time
What would best amount of steps to go for on a servo driven table
(Plasma) as far as Mach is concerned. Is there an amount that mach
does best at?
mike

Hi,

I can probable cobble up something fairly quickly. I can ""Pull"

of the boards test points, before the Isolation circuitry.

Thinking of the fly, it may be better to provide an isolated RC

the RC speed controller already have opto isolation?

Give my a little time to think it through.


Cheers,

Peter.


nattyone960 wrote:

--- In mach1mach2cnc@..., "Peter Homann" <groups@>
wrote:

Hi,

From memory the RC servo signal is a PWM signal with a period of

20mS with

the pulse varing from 1ms (Fully CCW) to 2ms fully (CW). centre

position

(Off) has a pulse width of 1.5mS

Mach is providing a PWM signal from 0 to 100% PWM for 0 to max

speed.

So, you can generate the 50Hz PWM pulse stream in Mach by

the PWM

base to 50.

Assuming you have set th Mach kernel speed to 45KHz, you have

(45,000/50) steps in your PWM signal.

At most the signal you are varing from 1ms to 2ms pulse so you

have

45 steps (900 steps/20ms) per ms.

I'm not sure that 45 steps will be enough. Although you can look

as 45

pulley settings on your machine. Probably better than what you

now,

but not a great improvement.

Then you would have to write a bit of macro code as you need to

Mach

to generate 1ms PWM pulse for zero speed, and a 2 ms pulse for

On the other hand I could modify the software in the DigiSpeed

produce

the signal if there is enough interest.

Cheers,

Peter.

How much interests?









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