Messages

4701

LazyTurn / Re: Why no tool path?

« on: April 03, 2010, 07:59:54 PM »

Ken,
That's what i like to hear "re-read the tools section" .
What or is there something missing in the manual that didn't come across?
RICH

4702

General Mach Discussion / Re: RPM and counting ?

« on: April 03, 2010, 07:52:07 PM »

Ianober,
If the case was metal you would usualy put a lug on the case and the bare ground wire would be attached to it.  That would protect the user should he touch a hot box ( the circuit breaker would pop if there was a short to ground ). If GFI protected then if a small current was sensed the breaker would pop. The transformer is usualy bolted to the metal case so you have a path to the earth ground. The transformer may not have a ground wire, the green with yellow strip could be a tap for a lower voltage off the secondary windings of the transformer. The primary and secondary windings of the transformer are suported by the transformer frame so attaching the ground wire to one of the mounting bolts of the transfomer would be acceptable because to you are using a plastic box. Just remember that i am not an electrician and safety is your sole responsibility!

Let me know how you make out with the cable check.

FWIW.....I have been were you are.......so smile as today is just another learning day! 
RICH

4703

LazyTurn / Re: fine cutpath issue?

« on: April 03, 2010, 12:03:38 PM »

What CAD program is that one?
If you want some general info about DXF's and common drawing mistakes see Appendix "B" and "C" in the LazyTurn Manual.
You may want to show that info to the guy at work.

RICH

4704

General Mach Discussion / Re: RPM and counting ?

« on: April 03, 2010, 11:55:56 AM »

IANOBER,
After you have checked out the PP cable as recomended and it that was not the problem try a different debounce setting.

In General Config> Index Debounce - instead of 100 try 1 or 10 or 30. That setting has an affect on what Mach considers
a valid signal for the index and can affect the displayed rpm. Easy to do.....
RICH

4705

LazyTurn / Re: How do you set the home position and do a simple 2d profile

« on: April 03, 2010, 08:21:46 AM »

WHATDA,
Attached is a rough draft of Appendix "F"  of the LazyTurn Manual which should answer most questions and then some.
You can't print the document but you can read it.

RICH

4706

General Mach Discussion / Re: RPM and counting ?

« on: April 03, 2010, 08:05:30 AM »

Good  video and confirmed all we have been saying and here is a schematic.

- Check the voltage on pin#12 of the BOB's db25 connection.
- Check the voltage on pin#12 of the cable at the other / PC end.
You should see roughly the same .5 to 5 V change and if so that would mean the index signal is good up to
pc and there is not a cable or pin problem.

RICH

4707

General Mach Discussion / Re: RPM and counting ?

« on: April 03, 2010, 12:34:19 AM »

You may want to try changing the index in Mach from active low to active high in ports and pins. It should work as you have it.

BUT.............

I have never used an LM7805 voltage regulator in the fashion you are using it. I am not sure just how well it will turn on and off
as it is meant to take  the higher voltage and limit it to constant 5v and can deliver up to 1 amp. So if you are running your spindle at 1200 rpm
that regulator will be switching on and off 20 times a second and don't think it is meant to do that. A signal going into a computer needs to have the current limited else you can do damage. Not sure what the max current for a PP and so just won't guess.

That said, I would of put the regulator upstream of the sensor ( maybe a LM7812 , puts out 12 volts ) and then use  a resitor to control current. But i am not an electronics guy by any means.

So that is why i am not gong to tell you to try a different pin on the PP.

RICH

4708

General Mach Discussion / Re: RPM and counting ?

« on: April 03, 2010, 12:05:33 AM »

Good so the sensor is working.
Do you see the LED in diagnostics turning on and off?
RICH

4709

General Mach Discussion / Re: RPM and counting ?

« on: April 02, 2010, 11:53:53 PM »

When you check the voltage from the sensor output does it change from the high of 20 volts to a low of 0 volts  when you turn the spindle ?
RICH

4710

General Mach Discussion / Re: RPM and counting ?

« on: April 02, 2010, 11:51:24 PM »

Where are you running the ground wire conn #3 / blue wire which is ground on the sensor?
rich