Messages

211

General Mach Discussion / Re: what is the column next to "subject"

« on: January 17, 2015, 05:50:40 AM »

Thanks tweakie- so how did you do that?

For that matter how do you put one of these smileys into your letter??

F

By the way I like your avatar-- Do you like cats?
A stray cay has just had 3 kittens in the bottom of our garden
If you are nearby you can come and collect them - but they are
as wild as blazes
F

212

General Mach Discussion / Re: to remember the position of the home switches

« on: January 16, 2015, 12:54:04 PM »

thanks for input
What i am hoping to achieve is that when i home to machine
 the x axis dro will read a preset diameter ( say maybe 80mm)
and the z axis dro will read z=8mm. ( this should stay in force until i move
the position of the limit switch at which stage it will have to be recalibrated)

( "work offset dro" - is that the axis dro ??)

In config. homing and limits  the values of the axix are all 0,0,0,0,0,0

at the bottom right of the general config page the buttons offset save , persistent offsets and persistent dro's are all
ticked the other two are unticked

thanks hood

fred

213

General Mach Discussion / Re: Mach3 reads dro as inches - displays mm

« on: January 16, 2015, 12:44:25 PM »

Thanks Hood--
there was a g20 in the code - i changed it to g21 and looks like problem solved
fred

214

General Mach Discussion / what is the column next to "subject"

« on: January 16, 2015, 12:23:03 PM »

In the mach3 forum topic page
What is the column to the left of the subject column ??

thanks

fred

215

General Mach Discussion / lack of power when using invertor ?

« on: January 16, 2015, 12:20:37 PM »

Hello chaps,
Opinions are welcome!!
I have a benchtop lathe ( chinese thing ) which i have changed to Mach3.
the original motor was a 750 watt 220 volt single phase motor.
I have changed this to a 1.1 kw 3 phase motor run by an invertor.

It seems to me that the new motor does not have the power that the original
motor had. Perhaps it is just my imagination but for example turning 50mm dia
delrin rod at 1500rpm i can only comfortably take a 0.5mm cut depth  at a feedrate of
0.35 per rev .
Does this sound about right  ??
when I used the machine with the 750 watt motor i seldom used more than
900 rpm because the gearbox was to noisy. but still at 900 rpm i could take a
reasonable cut 

regards

fred
 

216

General Mach Discussion / to remember the position of the home switches

« on: January 14, 2015, 12:36:59 PM »

Hello Chaps
I am using my lathe for the first time for about a year and i have forgotten some of the
things.

I seem to think that when i homed the x and z axis- i could them enter a value into the dro
for each . i think that  mach3 would remember that the home positions were as per the value that was set
so next time i pressed all home it would automatically set the dro's to those cooordintes. Am I correct ?
if not is there a way of setting the axis positions of the home switches so the machine knows where it is
when i switch on and say "home All" ?
regards

217

General Mach Discussion / Mach3 reads dro as inches - displays mm

« on: January 14, 2015, 12:26:23 PM »

I wrote a short program about a year ago and as i rerun it now there is a strange occurrence

i use the buttons to "set home x"  and "set home Z "
the machine is set for mm in the general config
the machine homes correctly just touching off on the home switches.
 Now i want to set thwe axis position of the z axix to be z+8. ( this means that 0 (zero)
will be 8 mm to the left of the home position.
when i enter "8" into the dro the dro converts this to "203.4" which means that it has
read the input as 8 inches instead of 8mm and then converted the input to "203.4"
which is the length of 8 inches expressed in mm.
Why is it doing this?
best regards
fred

218

Mach4 General Discussion / using feed per revolution

« on: January 12, 2015, 02:24:55 PM »

Hello Chaps.

Mach turn on o lathe

I recently fitted an inverter and now i have the ability to use css.
please tell me

1. do i use G95 as a word in the initialization string that appears in the general config box?

2. before i B*******R something would you please give me some suggested "safe" settings to start off
with. I use mm mode. please suggest a safe feed rate say f
I tried f 0.05 but it doesnt do anything
3. and how go i apply the CSS in the program.
many thanks

219

General Mach Discussion / Re: Hood's 12 tool tool changer

« on: January 07, 2015, 07:09:17 AM »

Scots engineering at its most innovative
regards

fred

220

General Mach Discussion / Re: Hood's 12 tool tool changer

« on: January 07, 2015, 04:42:53 AM »

Thanks hood .
So i suppose you let a piston move the one away fron the other- then let the servo index and then
reclamp to the new position?