Messages

5621

General Mach Discussion / Re: Problems threading on the lathe

« on: October 09, 2009, 07:44:39 PM »

ART,
I tried the advanced timing. It only shows that there is one slot and provides no slot or timing rpm data.
I looked at the diagnostics and it shows there is timing.
The index is port 1 pin 15
The timing is port 1 pin 10 ( pin15 and pin 10  are using the same signal )
If i remove the wire from pin 10 then the diagnostics will show 0 slots.
SO that one didn't work!

-------------------

"If you set the index and timing to the index pin, youll still be able to use it with only an index pulse..no wheel required."Ok, that plugin was posted on page 26 reply 253.
The index and timing is port 1 pin 15. Same as the other one no rpm data.

      
RICH

5622

General Mach Discussion / Re: Problems threading on the lathe

« on: October 09, 2009, 11:35:24 AM »

ART,
Made a 78 slot disc for timing, unfortunately, my optio is bad and need to order another one.
So no advanced timing test.

The plug in that i used for the advanced timing test was the one posted on page 24 / reply #238 of this
thread. Can you confirm that is the one to use?
There are only about 15 or so test's that have been posted in this thread!  
RICH

5623

General Mach Discussion / Re: Problems threading on the lathe

« on: October 08, 2009, 04:47:54 PM »

ART,
I'll do the advanced timing test.
I will say that the Threading Diagnostics screen always shows that the Real Time rpm is higher. It will float from 195.5 to 196.1
Till then,
Rich

5624

General Mach Discussion / Re: Mach3 with PCMCIA

« on: October 08, 2009, 12:50:25 PM »

Ray,
Just echoing what Russ said. PP cards can realy suck these days. Like, you get a card and the signal quality may be bad, or you get a card and none of the drivers are any good, etc. I have two that i bought that went into the trash can where they belong! A quart of beer would have been a better investment. 

Now i am smart, I would only buy one if the seller will accept it back if it doesn't work. And none of that 40% restocking fee stuff either!
What more can i say,
RICH

5625

General Mach Discussion / Re: Problems threading on the lathe

« on: October 08, 2009, 12:31:40 PM »

Hi All,
Just a little info on the visual inspection and pictures that i am posting for your reading pleasure.

Here is a picture of the scribed line located at about 2".  The test was done with a new sharpened pointed tool.
The intent of checking the end of the scribbing is just to confirm that there is a single scribed line that i am measuring to for checking the lead. If there are multiple scribed lines then something mechanical, electronic / electrical, or even software can be causing it. So there is consistentcy here. I will remark that the line is .002" wide and .002" deep after 40 passes. The picture is taken with a camera through the fical micrometer eyepiece at 40x .
So you can measure directly to 0.0001".  

During the threading cycle, the actual cutting / scribing is being monitored via a 30x microscope mounted on the lathe  carriage. You can see the actual scribing cut and watch the width as the passes increase. Should any "tracking" of the scribed line vary , then the  pass that created it is noted.

Now up to this point,  most of the error that's been noted is over a 1" distance. If you have error at 1", the error will continue on down the thread. So if it's .007" at 1" of threading then it will be .028" at 4". No long threads have been done because it would just be wasting material and taking a lot longer to test.

I'll try and post something to put the error into "practical" perspective later on.

RICH

5626

General Mach Discussion / Re: Problems threading on the lathe

« on: October 08, 2009, 11:28:27 AM »

ART,
First test with no correction. I was  just interested what the lead would be like.
Test done at 115 rpm / 40 passes at .1 pitch / .0001" depths same as all the other resting.

There was a single scribed line and the pitch decreased by .007". Now i measured two quadrants  of the scribing and that was the average since one was .0055  and the other was .008. So a small change maybe not worth considering.

There is something interesting, maybe:
Ran driver test for 25000khz and pulses now at 24802.
Chips screen shows kernel at 24933.

I rebooted after the threading  test and got the same same exact kernel as above. Those are different than  what was shown in the other tests.
The other driver showed 25455 and Chip's  screen reported 23654.

I didn't see any reason to do some more scribing tests figuring if that one was off the others would also be off.

So what do you think?

RICH

5627

General Mach Discussion / Re: Problems threading on the lathe

« on: October 08, 2009, 09:25:40 AM »

Thanks a bunch ART,
I was waiting for it and will do a few tests today.
RICH

5628

General Mach Discussion / Re: Mach memory cache annoyance

« on: October 07, 2009, 10:40:29 PM »

HMM...
Close both appications. Do a Windows search of the file name. There should only be one file in one location with that name. If there are more than one get rid of the others.
RICH

5629

General Mach Discussion / Re: Mach memory cache annoyance

« on: October 07, 2009, 10:32:14 PM »

I have never seen that behavior.
New one to me also.

RICH

5630

FAQs / Re: Voltage swing

« on: October 07, 2009, 10:14:54 PM »

madmacs,
Lets start at the beginning.
1- You go into config>ports & pins and in the first screen and you make sure that  the address for the PP is corrrect. Make sure you ckeck the box above the addrress to enable it.
2- Now open the Motor Outputs - you enable the drives you are using and then define which pin the PP will use for the step and direction signal. You also need to check / define if it is active low or high. Lets just use  port #1 for both and then assign pin #
2 & 3.
3- Now open the input signals and scroll down and make sure the Estop is enabled, assign port 1 and pin 10  and check the Emulated box ( i don't know what you have so it shoulds still work )
4-The output signals and enable MPGS could have nothing checked and should still work thru the PP
5- Go to Motor Tuning and add the appropriate steps per unit , velocity, step and direction pulse number ( try 4 )

Do this for one axis, say the x axis.

Now you should be able to do a reset ( stops the red flashing reset button ).
Use the Tab key and then click the X + and X- , you should see the DRO's change.

Now if you were to use a meter and measure voltage from Pin # 2 or #3  to ground you will see the voltage change. Some PP ports only output 3 volts, some only 5 volts, and some PP cards allow / provide for either voltage via a jumper.  You should see a voltage change as you alternately click the X + X- . I don't know what your drivers require, but, dosn't matter for just testing the PP.

Now if you don't see the DRO's changing, then the address of the PP may be wrong. And BTW, make sure you have it enabled by checking the box above the address you entered.

I can't configure your machine as i know nothing about it. If i give you my xml the config will be wrong and i guarentee you the PP address i use will not be correct.

SO you should be able to see the dro's move, but if no signal out the PP, then chances are the address is not correct or MAch didn't accept it.
 
Hope this helps,

BTW: What version of MACH are you using?

RICH