Messages

11

General Mach Discussion / Re: RPM not under 38

« on: August 23, 2010, 05:28:28 PM »

Rich,
I tried all you suggestions but no results.
Changed the kernel from 100kHz to 25000Hz,,, no result.
The input signal from the optosensor is nice and straight, so it seems to me that it is something in mach that's working not good.
Still the lowest RPM i get is 37. Higher is no problem at all.
If I go lower Ill get much higher numbers, who are by the way stable.
So it changes from 37 to something like182 or something like that.
I'm running out of ideas, do you have some left?

gr jaja

12

General Mach Discussion / Re: RPM not under 38

« on: August 22, 2010, 04:32:04 PM »

Rich,
Thanks for your fast reply.
Just went to the lathe and tried your ideas.
Changing the width of the reflecting surface and changing the debounce interval and index debounce did not make any difference.
The lowest S-TRUE I can get is 37. Lower is not possible.
What more could I try???

gr jaja

13

General Mach Discussion / RPM not under 38

« on: August 22, 2010, 02:44:11 PM »

Situation: disk with one reflecting part and an opto sensor.
It gives a nice stable RPM DRO.
But when I let the machine rotate under 38 RPM, the S-true DRO shows wrong numbers in a random way (like 1546 rpm).

Does someone know how to solve this problem and make it possible to measure under 38 rpm?

gr jaja

14

General Mach Discussion / Re: Index and/or timing on >config>ports and pins>input tab

« on: February 17, 2010, 05:17:59 PM »

Rich,, thanks again,

scribe a line,,, hahahahaha lol  that's what you get when using a strange language,,, sorry for this.

I'll print the manual and read it on every spare minute I have and then I'll charge the lathe again.

Thanks a lot, your help is much appreciated.

gr jaja

15

General Mach Discussion / Re: Index and/or timing on >config>ports and pins>input tab

« on: February 17, 2010, 02:52:55 PM »

Rich,

The spindle speed was set at different values,, and none gave a good thread,, they all did not follow the previous path, but cut on the place where the top of the thread should be.
When i was threading the VFD was not connected to the PWM signal of mach! The spindle speed was set by hand by a trim-pot. The last attempts were done at a spindle speed of 200, and this number stayed stable!

Do you think it is something in the program? Or is it the variable frequentie of the cpu in the computer?

Where is the manual you mentioned before?
"If you can't scribe a single line then no use trying to actually cut a thread."  I don't know what you mean with this. I use the wizard in mach. Scribe a line???
I sometimes connect some wizzards into one single action, but I do not scirbe them myself

gr jaja

16

General Mach Discussion / Re: Index and/or timing on >config>ports and pins>input tab

« on: February 16, 2010, 05:25:32 PM »

Rich,
Thanks a lot for your reaction!

But there are two different problems: 1 threading goes wrong at about the sixth pass
                                                     2 the spindle motor is not controlled by mach at all, it only runs full speed

The treading is done without the VFD controlled by mach,,, it was controlled by a simple trim-pot. I did it this way to keep things simple and clear.
I never succeeded in mach controlling the spindle speed,, so I was (and still am) wondering if it was mend the be controlled by mach in the manual mode.

The last version of mach is probably better in threading.
Perhaps I will test mach with a very old computer to see if it works better.

gr jaja

17

General Mach Discussion / Re: Index and/or timing on >config>ports and pins>input tab

« on: February 15, 2010, 02:42:29 PM »

When in manual mode, you give a S-DRO of 200, the spindle must turn at about this speed???
Seems a stupid question, but I can not get the spindle on another then maximum speed.
I think I'm the one who makes a stupid fault, but Ive been searching for it and cannot find it.

gr jaja

18

General Mach Discussion / Re: Index and/or timing on >config>ports and pins>input tab

« on: January 09, 2010, 06:19:59 PM »

Hood,
It seems that the modern CPU's have variable frequenties (read it on the forum), that causes a lot of problems.
Perhaps this can be locked down on the motherboard-settings of my lathe computer, which has one of the latest CPU's.

gr jaja

19

General Mach Discussion / Re: Index and/or timing on >config>ports and pins>input tab

« on: January 09, 2010, 06:08:55 PM »

I'm using mach 3.042.033, but is just saw a later version on the Artsoft site.
Tomorrow morning i will configure it the way you explained.
thanks
jaja

20

General Mach Discussion / Re: Index and/or timing on >config>ports and pins>input tab

« on: January 09, 2010, 05:51:13 PM »

Ah Hood, nice of you to react, and so quickly again.

The optical sensor is one that sends light that reflects on a surface and than receives it again.

The settings done on the Spindle Pulleys page aren't remembered by the Calibrate Spindle page.
I don't know why.

I'm busy reading the 73 pages on the topic "Problems threading on the lathe", and tried to figure out if this can help me,, but,,, no success at this moment (page 37).

So I use the Index input,, but I do not use it as an index, more like a timer, I thought. And should it be on Emulated?
And which output should I choose? Enable 1, or 2 or 3? Or should I use Output 1 or 2,,,,,?

If I stop the spindle, the S true DRO still gives a number like 127, or 378.
Can't figure out how mach can see 378 revolutions when there is no signal from the optical sensor.
And as long as this is not oke, threading can't be done, I think.

gr jaja