Messages

131

General Mach Discussion / Re: Spindle RPM feedback, not low enough.

« on: February 13, 2013, 06:27:00 PM »

Hi Katoh,

Looking at the datasheet for the  OPB916B sensor, it  has an open collector output with a 10Kohm pull-up resistor.   When activated, the open collector transistor pulls the output line  (blue wire) to 0V.

So you MUST have the MB-02V6 inputs pull-up jumper set to 5V (pos 2-3).  Is this the case? If, not it won't work.

Cheers,

Peter.

132

General Mach Discussion / Re: Spindle RPM feedback, not low enough.

« on: February 13, 2013, 03:34:21 PM »

Hi Katoh,

Sorry, I had not been monitoring the forum for a while and have been a bit busy.

I'll have a read through the thread and see what I can find.

What index sensor are you using?

Cheers,

Peter

133

General Mach Discussion / Re: Spindle PWM acceleration and deceleration time?

« on: February 13, 2013, 03:16:22 PM »

I setup the Spindle PWM and work.

But I wonder.
Why PWM signal does not accelerate or decelerate?

When I switch to M3,
immediately sends pulses of "S" (speed), without accelerating.

When I turn to M5,
immediately turn off the pulse train.

Mainly I'm interested in accelerating the switch.
for example with M3S15000

When I change M3S12000 speed, M3S14000, M3S16000 ... changing the pulse train without acceleration.

It is normal that sends Mach3 PWM signal without acceleration?

What I look for is a soft start motor.

Mach3 does not use the motor tuning acceleration values for the Spindle axis when generating the PWM signal through the parallel port.

That said the SmoothStepper does use it when generating the PWM output.

Cheers,

Peter

134

SmoothStepper USB / Re: Hitting Reset does not stop charge pump and pops up error screen...

« on: February 12, 2013, 09:49:33 PM »

Hi,

The chargepump signal should have nothing to do with your ESTOP.

When a PC boots, it twiddles the outputs of a parallel port. This may cause outputs such as a spindle to momently turn on. The Chargepump output is there to tell the breakout board that Mach3 is running. THAT'S IT!

 always have the chargepump in ESTOP box checked.

It is not there to be some sort of ESTOP protection. To rely on it for ESTOP protection is dangerous. If Mach3 runs off the rails, there is no guarantee that the charge pump will be removed , and there is no guarantee that mach3 will respoind to the ESTOP input.

You need to rely on external ESTOP circuitry as you are doing. The only purpose of the ESTOP input in Mach3 is to inform the software that an ESTOP has occurred and that it can rest easy while the operator sorts it out

As to the smoothstepper, the chargepump has no place as it is in total control of its outputs and won't be twiddling them while starting up.

As to the conflict between the SmoothStepper and the Pokeys I'm not sure what the answer is. Maybe run the wire to the Smoothstepper rsther than the pokeys?

Cheers,

Peter

135

Modbus / Re: Lathe Toolchanger in VB via Modbus and PLC

« on: February 07, 2013, 04:40:10 PM »

It's fairly simple.
Using the plugin
 Modbus, the M6start macro needs to tell a brain (via a user DRO) to put the new tool into the Modbus register to send it to the PLC.

Another brain needs to monitor the Modbus register from the PLC, to determine when the change is done. Once done this brain informs the M6 Start macro that the change is done (via another user DRO)

Meanwhile the M6Start Macro has been sitting in a loop waiting for the change to complete by checking the user dro that will indicate this.

Cheers,

Peter

136

Modbus / Re: Help Arduino Modbus RTU

« on: January 31, 2013, 05:43:10 PM »

Hi guys
I'm trying to use my arduino mega as Modbus but I can not activate inputs or outputs to put buttons and LEDs.
The feed and speed potentiometers for misalignment with the brain
http://www.machsupport.com/forum/index.php/topic,22980.0.html

For example like putting a running Cycle Start button

And LED lights to run Cycle Start

I hope you can help me

thanks

Hi Have a look at the article I wrote. I should help.

http://www.homanndesigns.com/pdfs/Using_Modbus_with_Mach3.pdf

Cheers,

Peter.

137

General Mach Discussion / Re: Steppers No Work!

« on: January 19, 2013, 07:56:35 AM »

 

I'm off to get some shut-eye then.

Cheers,

Peter

138

General Mach Discussion / Re: Steppers No Work!

« on: January 19, 2013, 02:00:45 AM »

Also, how many wires do your steppers have?

Peter

139

General Mach Discussion / Re: Steppers No Work!

« on: January 19, 2013, 01:49:36 AM »

Hi Katoh,

The fact that you are open circuit between A+ and A- and B+ and B- indicated that you may have the wires labelled incorrectly.

Did you try to measure between A+ and B+ or A+ and B- or A- and B+ or A- and B-

When you say you applied power to the steppers, how much voltage did you apply? Steppers are rated around 2V-5V. If you applied 48V then you would have smoked them after a short while.

If you applied 48V and nothing happened then my guess is that the wires you are calling say, A+ and A- are in fact wrong , and that would be lucky as you would have damaged the motor.

Don't just guess and try things otherwise you will eventually destroy something.


First step is to identy the wires that belong to each of the stepper coils.

Cheers,

Peter

140

General Mach Discussion / Re: Steppers No Work!

« on: January 18, 2013, 10:59:21 PM »

Hi Katoh,

Until you can get the Stepper motors to lock, there is no use in worrying about whether the step/dir signals are reaching the drive.

Checks that you have wired the steppers correctly to the G203V. You need to identity the pairs of wires that belong to each stepper coil.

With the stepper disconnected from the G203V use a multimeter to find the 2 wires belonging to each coil.The multimeter will show a few ohms between the 2 wires of a coil. Then check that the 2 wires of a coils are wired to A and /A   and the other coil to B and /B

Also, what value of current set resistor are you using?

Cheers,

Peter