Messages

4931

Third party software and hardware support forums. / Re: Need help with c41 board and pwm spindle control with VFD

« on: August 04, 2013, 03:48:44 AM »

If the circuit which you are connecting the TTL output to applies too much loading and the TTL voltage is falling then perhaps consider including a simple transistor driver.

This page may be of interest  http://www.bristolwatch.com/ele/transistor_drivers.htm

Tweakie.

4932

General Mach Discussion / Re: Getting started help.

« on: August 04, 2013, 01:48:09 AM »

Hi Tim,

To run Mach3 successfully whilst using the parallel port you need to be using a PC (laptops seldom work well).
If you download and run Parmon http://www.geekhideout.com/parmon.shtml this will identify your parallel port address and allow you to test the port for output and input.

Tweakie.

4933

Show"N"Tell ( Your Machines) / Re: The Laser Project.

« on: August 03, 2013, 12:44:40 PM »

Thanks Mike.

I had to do a bit more acrylic cutting so while I was at it I made this - one can only dream. 

Tweakie.

4934

General Mach Discussion / Re: How would you trigger a recripricating air operated dot peen marking head?

« on: August 03, 2013, 02:19:36 AM »

Nate,

The digital trigger output pulses from the Impact / Laser plugin consist of two parts, an ON and an OFF with a maximum duty cycle of 50%.
Many have successfully used this plugin with electromagnets so I see no reason why it could not be used with an air operated solenoid.

This and other linked threads relate  http://www.machsupport.com/forum/index.php/topic,20490.0.html

Hope this helps.

Tweakie.

4935

General Mach Discussion / Re: Mach3 Output For DC Motor Control

« on: August 02, 2013, 12:16:42 PM »

"All of us together are smarter than any one of us"

Absolutely true my friend 

Tweakie.

4936

FAQs / Re: E-STOP - Help

« on: August 02, 2013, 12:09:24 PM »

Don't pay too much attention to the "Port 1 Pins Current State" LED's - they seldom work correctly, if at all.

The "Input Signals Current State" and "Output Signals Current State" are what you should be guided by.

Tweakie.

4937

General Mach Discussion / Re: Mach3 Output For DC Motor Control

« on: August 02, 2013, 12:01:48 PM »

Hi B,

Please keep us informed of the progress on your own designed PWM speed controller. Once it is all sorted I am sure others would be most interested in the circuit details etc. if you are happy to share it as a project.

Tweakie.

4938

Third party software and hardware support forums. / Re: Need help with c41 board and pwm spindle control with VFD

« on: August 02, 2013, 09:39:26 AM »

Problem #1) Assuming your PWM signal is 5 Volt then you could use just one gate of a simple TTL logic chip to invert the signal.

For example if using a 74LS00 then…
Input – pins 1 and 2 connected together.
Output – pin 3
+5 volt (regulated) – pin 14
GND – pin 7
The other unused inputs (pins 4,5,9,10,12,13) should also be connected to GND

Problem #2) When you say you are supplying -12 volts to the GND terminal I assume you really mean 0 volts ??

Tweakie.

4939

General Mach Discussion / Re: New machine with a goofy problem

« on: August 01, 2013, 01:44:47 AM »

Sometimes those TB6560 boards work OK sometimes they don't. 

When you upgrade to the Gecko you will have no problem.

Tweakie.

4940

Show"N"Tell ( Your Machines) / Re: Improving a cheap 4th axis

« on: July 29, 2013, 05:16:50 AM »

Nice work with the 4th axis Nick 

(You need a little shelf, a bit higher up, to prevent the machining chips getting into your Beer  )

Tweakie.