Messages

221

General Mach Discussion / Re: Problems threading on the lathe

« on: June 03, 2009, 06:12:56 PM »

Hi, Art

The @Sample# Min reading is Not always 0, In fact threading is actually working today.

Hears 3 more Pic's.

Chip

222

General Mach Discussion / Re: Interface question

« on: June 03, 2009, 03:19:23 AM »

Hi, Bill

I neglected to say that the manual's are somewhat out dated,

pic 1 shows soft limit's on and setup in Home & Limit's setting's page, You may need to click on Display button to turn on Table Display Mode view screen.

pic 2 There are 3 modes that G code window can be in also, Click on it several time's to see the diff. mode's, one of which shows additional line numbers that requires a double mouse click, The center white line shows next line to be processed.

pic 3 is a larger view of view screen.

To many updates to Mach version's for the manual to keep up to date.

Chip

Hi, Hood getting late hear !!

223

General Mach Discussion / Re: Problems threading on the lathe

« on: June 02, 2009, 10:30:34 PM »

Hi, Art

The previous Indexing code needed a very large window to allow Mach to see the change of state of the index pulses.

Was just checking that, In fact this new way of getting Index and Timing values are the same in Scope/Code structure now gathering the Data.

As I stated in previous Post, "Hear are 3 pic's, First is my cpu with puls ferq issues it seam's to thread and not have issues".

( The snap shot was taken with a cut in progress and with a Stable Pulse Freq. During the Scope Data gathering  Time ).
( Simulated, Signal Source is a 555 timer for "Timing" with a Divide by 10 Decade Counter/Divider (MC14017BCP) IC used, Both computers sharing the same Data.

The Index Base RPM, Threading Lock RPM and Slot Base RPM are the Same and quite stable on this computer.

"the other cpu still has issues." Pic's 2 & 3. With the Main PCI time base being Large and the Scope readings off Scale as before, But you can see the "10"  Number of Slot's & Index Base RPM's are consistent & the Same on Both Computer's.

As you know all this information takes allot of time to gather and keeping it sorted out, So please let me know if it doesn't make Sense.

More to follow in a Bit, A comparison with Index/Timing pin's set the Same.

Edit: Well as usually happens, Had 2 "Comp. 5" opto's sensor's to test with, ( Go figure,  "Art" ), It dose appear to be an issue with the "Index" opto's.
( Digging the potting compound out to see what "Emco" did to make them so different in response Time ).

Any way for the computer that threading works with (Pic 1), The values are very close if not write on the money, Other computer, (Pic 2) is still not threading and showing bad data,

If I can find the other MC14017 chip's buried on my desk, I'll do some 100 to 1 comparisons with the 100 slot disk on the Compact 5 while I find another couple of opto's, If the Digging isn't a Success, Eating some "Chile" to see if I can make the Heartburn Worse.

Thanks, Chip

224

General Mach Discussion / Re: Problems threading on the lathe

« on: June 02, 2009, 11:22:58 AM »

Hi, Art

Hear are 3 pic's, First is my cpu with puls ferq issues it seems to thread and not have issues, the other cpu still has issues.

I think I finally have my comp 5 OPTO's working now, 100 slot disk, Both cpu's will not pickup index slot with spindle speed at 250 rpm but will

pickup and calculate the 100 slot numbers value at spindle slow down to stop when it's turned off (spinning down).

(original small index slot on disk). It may be the index opto at fault, The timing opto picks up and triggers at 250 rpm and faster.

Anyway to make the index pulse pickup the smaller slot width the way the timing slot dose on your end.?

Chip

225

General Mach Discussion / Re: Pulse Frequency

« on: June 02, 2009, 03:18:33 AM »

Hi, Chris

Sounds like the luck I have hear, Been chasing my tail for awhile also.

Chip

226

General Mach Discussion / Re: Pulse Frequency

« on: June 01, 2009, 10:32:02 PM »

Hi, Chris

Only the "Direction" Low Active will do that in ports & pins, If the control's are all the same then all low actives dir & step should be the same all way's.

Home & Limit's, "Reversed" is used to Reverse an Axis when Needed, Or you need to change motor wiring.

Chip

227

General Mach Discussion / Re: Pulse Frequency

« on: June 01, 2009, 09:10:14 PM »

Hi, Chris

Try setting the A axis step low active the same as all the rest "Checked", They should all be the same, Some controls are sensitive to this.

If it's a different type of control for "A" they may need to be "X" for step & dir Low actives settings.

Chip

228

General Mach Discussion / Re: Pulse Frequency

« on: June 01, 2009, 06:27:17 PM »

Hi, Chris

It could be several things, Is your Pulse Frequency locked in solid all the time ?, Try setting your Step & Dir Pulses to 5 in Motor Tuning may help (It will give Your Control more time to see the pulses from Mach), Post your xml it may show some other issues that could cause it also.

Are you losing steps in Y and A only. ?

Chip

229

General Mach Discussion / Re: Pulse Frequency

« on: June 01, 2009, 05:53:23 PM »

Hi, Bill

Try referring to the manual, It's under Support above.

Her's a Link, http://www.machsupport.com/docs/Mach3Mill_1.84.pdf

" **** 5.2.2 Defining engine frequency

The Mach3 driver can work at a frequency of 25,000 Hz (pulses per second), 35,000 Hz or
45,000 Hz depending on the speed of your processor and other loads placed on it when
running Mach3.
The frequency you need depends on the maximum pulse rate you need to drive any axis at
its top speed. 25,000 Hz will probably be suitable for stepper motor systems. With a 10
micro-step driver like a Gecko 201, you will get around 750 RPM from a standard 1.8o
stepper motor. High pulse rates are needed for servo drives that have high resolution shaft
encoders on the motor. Further details are given in the section on motor tuning.
Computers with a 1 GHz clock speed will almost certainly run at 35,000 Hz so you can
choose this if you need a higher step rate (e.g. if you have very fine pitch lead screws).

******************************************************************************************

The demonstration version will only run at 25,000 Hz. In addition if Mach3 is forcibly

closed then on re-start it will automatically revert to 25,000 Hz operation.

******************************************************************************************

The actual
frequency in the running system is displayed on the standard Diagnostics screen.
Don't forget to click the Apply button before proceeding. ***** "

Hard to read your mind, Way to go, Your Cat, Tell's it All.

Good Luck, Chip

230

General Mach Discussion / Re: Pulse Frequency

« on: May 31, 2009, 07:43:13 PM »

Hi, Bill

In short you don't need to increase the pulse frequency unless you max out your motor tuning velocity values.

If your steps per values are below 10,000 per unit, 25 K should be fine for now, It will all make sense in a while.

Chip