Messages

1

General Mach Discussion / Re: Accurate homing

« on: June 28, 2010, 08:49:45 PM »

I stand corrected - sorry for my attempt at encouragement by way of a little joke...

I did like the joke, but i have met so many young guys programming with high level language but making a good job feel complexed in front of old horses (like me) who have made assembly, c, lisp(yes) and i say to them go buy a little arduino and discover that 95% (at least) of your job is not requiring  low level so if and only if you have timing problems then dig it.
I am convinced that a good analyst programmer with whatever language can make a good job, and, in front of a real problem will be much more easily able than they think  to program in c Kerningham& ritchie will help 

2

General Mach Discussion / Re: Accurate homing

« on: June 27, 2010, 08:29:08 PM »

Ray Livingstone wrote a draft manual for VB, you should find it here http://www.machsupport.com/forum/index.php/topic,12740.0.html

Hood

Thank you very much This is exactly what i am looking for .
About jet fighters, unfortunately(?) it's not the language that make the program ! and a precise idea of what you want to do + a good knowledge of what can be done may compensate a n heavy syntax also our computers are very fast now so i think we can handle it.
I also meet guy who where programming in c VERY inefficiently !
And since some manage to do it so i can do it too(hopefully)

3

General Mach Discussion / Re: Accurate homing

« on: June 25, 2010, 06:34:23 PM »

Hello,
I have a Milll equipped with 3 servo equipped with 3 rotary encoder
We also have 3 DRO linear encoder 5micron
The index of the Dro linear encoder is on the middle
Due to the short time available to see the index I have made a little electronic using a flipflop and opto so when the pulse appear(even at full speed) it stay on. Mach then get enough time to see it stop go reverse very low speed and when he reach the index again stop.
The problem :
I use a bob where the limit switch and the home switch are linked . So if i send a home signal it's equivalent to a limit.
I have put a relay that inhibit the entry of the opto so even if the home signal is deliver the flipflop will not see it

I must write a macro  for homing:
I activate an output that will select a relay and energized my opto
 Since i do not know where i am :go left if i reach home stop reverse slow if i reach soft limit i go reverse until i find my home 

But i do not know how to write a macro in mach (list of instructions, environments variables, editor) since i used to program in C , i am not too affraid but i need to get the starting point

4

Finished Plugins for Download / Re: Huanyang VFD controller plugin

« on: June 18, 2010, 09:41:58 PM »

thank  you for the answear

" I think you are getting confused with the two different ways of controlling a VFD from Mach"
So only 2 ways 0-10V or  rj485 so it's going to br rj45 because we want a very precise speed regulation for tapping .

Last question is it a good buy for the price given by alibaba?

5

Finished Plugins for Download / Re: Huanyang VFD controller plugin

« on: June 18, 2010, 06:02:40 AM »

Hello,

Is it the Huanyung?

http://www.aliexpress.com/product-fm/315357168-2-2KW-VARIABLE-FREQUENCY-DRIVE-INVERTER-VFD-3HP-10A-NEW-wholesalers.html

I must say that installing a VFD looks a litlle bit scary, ok i remember having the same fear with servos , you find difficult what you do not know but ?
There is something i do not understand :
You use a com/usb 485 ibut on my BOB break board sound Logic pc 2 rev 1.9 I have step dir. I was thinking that the step was in fact sending the pwm signal generated by mach3 through out 1 for step and out 2 for dir.
also i see that they speak about Sinusoidal Pulse Width Modulation but is this SPWM  a signal that must be send by mach 3 or we send a pwm signal which is transformed inside the VFD in SPWM?
Also is anyone that can give me VFD for the dumb (if any) document i can read ? Because actually more i learn and more it look confused.
Last I have a LAGUN FTV2 and i want to control the original 3 phases spindle motor of my mill so about 3000 RPM and not 24000 Am i on the corect thread?

Thank you
Lucien of Athens