Messages

151

General Mach Discussion / Re: feedrate changing after spindle stop part 2

« on: June 17, 2015, 10:01:28 AM »

 my version is 3.042.040

I will upgrade later this evening

in the meantime my xml file is attached
many thanks

fred

152

General Mach Discussion / Re: feedrate changing after spindle stop part 2

« on: June 17, 2015, 04:54:35 AM »

thanks thomas--

this is not what I have. Mine definitely resets to f=.or
what version of mach3 do you have?
will the .xml file be able to tell you anything ?? if so I will
email it to you tonight when i get back to the computer
or maybe one of the other files that nack generates?

( are you in Bavaria? ) ( I have a brother living in Munchen)

153

General Mach Discussion / Re: feedrate changing after spindle stop part 2

« on: June 17, 2015, 03:35:00 AM »

thank you very much
I am going to try and attach the .tap file If I cant get it right then i will email it to you seperately

Please dont try mand cut with the code because i havent debugged the sizes yet
and it is bound to cause a crash

I have just been cutting with no tool in the toolpost. you will notice that the f word is set correctly
until it gets to the first G01 word and then it resets itself to 0.04

154

General Mach Discussion / Re: feedrate changing after spindle stop part 2

« on: June 16, 2015, 10:46:10 AM »

thanks for that thomas- i did change the line and still have the same problem.

If i were to send you my file would you be able to put it on your computer and
see if it runs correctly.

I did recently pick up a compile error regarding one of my M files and i am concerned
that i may have got some form of corruption

I would appreciate your help

regards

fred

155

General Mach Discussion / feedrate changing after spindle stop part 2

« on: June 16, 2015, 05:56:12 AM »

Hello chaps

After the earlier posting i thought i should post the code for the experts to have a look at

I have marked the line in the subroutine where it always changes the f value


Here it is
% filename is    :-   simple boresinglecut.tap
% program number:-   01001  (program number -put at start of program)   
% Program name    :-   simple boresinglecut.tap
% Program description:-   Makes a single cut in the bore according to parms set
%          SETUP STRING (INITIALIZATION)------
% make sure to home the machine first then to reference x and z positions
m05            (stop the spindle)
g18            (xz plane)
g21            (feed in mm)   
g40            (g49)
g95            (feed per rev mode set on)
%G80         (cancel motion mode)
%g96         (CSS control)
s1400         (CSS cancel and set speed to 1400)
%g61         (exact stop mode)
g64            (constant velocity mode)
f.1            (feed .1 per rev)
g028          (go to home position)
% -- setting up parms-------------------------            
#1=27.0         (bore start dia)
#2=-38         (end of z cut notice the minus !!)
#10=.5         (first diameter on bore x axis)
#11=4         (second diameter on bore x axis)
#20=4.5         (first cut length on z axis)
#21=9         (second cut length on z axis)
#22=42         (third cut on length z axis)
m04         (start spindle forwards)
m98 p1 l3      (run sub no 1 5 times)
% ---- program shutdown starts----
m09             (water off)
m5              (stop spindle)
m30             (end program and rewind m2 will also end program)
% ----------this is the end of the program --
O01   (subroutine  #1 starts)
g0z19         (start to clear front of boring bar)
g0x#1         (START cut X axis)
g0z1         (move z closer)             ********this is where it always changes the feedrate
g01 x#1 z-5         (cut in 5 mm for the location)
g01 x[#1-#10] z-9   (bore first taper)
g01 x[#1-#11] z-39   (bore second taper)
g0 x[#1-#11-1]z-38   (back off quickly)
m 05 g0z50      (stop spindle move tool out of the way for measuring)
g0x#1         (put tool back to show size on dro)
%m00          (msg,stop and measure then press cycle start)
m04            (start spindle again)
#1=[#1+2]      (add 2mm on dia parm )
m99            (this is end of sub 01)
%   LEAVE THIS % TO MARK END OF FILE

156

General Mach Discussion / feed rate changing after spindle stop

« on: June 16, 2015, 05:41:07 AM »

Hello Chaps -- please suggest a solution.
 I am using mach3 on a lathe.
At the start of the code i set the  f=0.1  (mm) as the code runs i use
a m0 to stop the spindle so i can measure the size . when i use m4 to
start the spindle the feed rate has changed to about 10% of the original
setting and the DRO shows feedrate at about .04 ??
any idea what i am doing wrong??

regards

fred in South africa

157

General Mach Discussion / s word and actual speed on lathe spindle

« on: April 13, 2015, 07:22:08 AM »

Hello Chaps
Talking about speed and ratio on lathe spindle
My Machine has a gearbox with 12 gear ratios. I am using
an Omron drive controller

I have a 1400 motor and for this query I have selected
pulley number one and manually selected gear ratio that would give
spindle speed 80 rpm

When setting pulley ratio in the pulley ratio drop box
I have entered the following in the  .
pulley number 1
minimum speed 20
maximum speed 1400
ratio 1.01

With this setting when I say S1400 M4  then the speed actual reads 140 rpm and
a tachometer check on the spindle confirms that the spindle is actually
running at 140 rpm

While running as above the s word DRO is reading 1400 which confirms the speed that the
motor is running at.

this is means that the s word is referring to the motor speed.

I would have expected the s word to refer to spindle speed??

How do i get the s word to refer to spindle speed??

Regardfs

fred
 

158

General Mach Discussion / pulley ratio

« on: April 11, 2015, 11:44:05 AM »

I am really struggling master the pulley ratio setup

I have a chinese machine with a 9 speed gearbox.
the gear ratios are from 80 rpm up to 1600 rpm
I have installed an Omron MX2 drive which does a nice job of controlling
the motor revs when I use the S word in the MDI line - So that side of it seems to work nicely

Now i am setting the pulleys and am struggling to get the spindle speed to
do what i want it to do.

I am using standard screenset (1024.lset I think it is)
On screen are two boxes one says true speed . This box correctly
displays the speed of the spindle.
the second box displays the speed  as set by the S word in the mdi line.  
I have a tachometer and both DRO's  WERE  displaying correctly before i started to
mess around with pulley settings

please help with my understanding of the terminolgy on the pulley ratio setup
box

The drop-down is entitled "pulley selection"
first box is pulley no 1
second box is minimum speed - does this refer to the minimum speed of the motor or of the spindle?
third box is maximum speed _ again does this refer to the max speed of the spindle or the max speed of the motor?
the last box says ratio . I dont know what the gear ratio is  but i do know that if a certain ratio is selected
then when the motor is turning at 1500 rpm at that speed the spindle is 1245.
Now what do i enter into that ratio ?? And please show how you get to the figure.??

Stupid question ( I am sorry) but my mind is spinning at the moment

then there is a box which says "reversed" a tick in this box doesnt seem to do anything --I still have to
use an m4 to get the motor to reverse.

thanks all
Fred

159

General Mach Discussion / Omron vfd support group

« on: April 11, 2015, 08:27:58 AM »

Hello Chaps--
I have an Omron 3g3mx2 drive driving the spindle on my lathe.
Because I am trying to get into this whole thing i am looking for support specifically
on variable frequency drives

Can anyone point me to a forum??

regards

fred

160

General Mach Discussion / Re: ative low or active high??

« on: April 11, 2015, 02:47:31 AM »

yes well everything seems to run OK so thanks for the input

What is a BOB?

thanks to everyone

fred