Topics

31

Forum suggestions and report forum problems. / Deleted posts

« on: March 22, 2007, 07:04:57 PM »

Hey benny,
I posted a thread on the tangent corner section. It was deleted. I guess it was because of the server change... or maybe I did something wrong!
Also, when i loged in i put to have me always logged.
Now if i go to the main forum page, it says i am a guest, but i just go into any section, and it shows me as logged in. weird.

Just thought you might like to know. its not a real problem though.
Regards
Fernando

32

VB and the development of wizards / VB script consuming too much resources

« on: February 19, 2007, 05:24:49 PM »

Ok, I have a VB script running in the macro pump, and it uses 99% of my computers resources, so sometimes it slows down, It may be my way of coding or something. Anyone here sees something wrong with the code?


BB=0
CC=0
DD=0
EE=0
FF=0

Do While GetUserLed(1020)=1

Code "G01 A36"
While IsMoving()
Sleep 100
Wend

If IsActive(Input1)=TRUE Then
BB=1
Else
BB=0
End If

If BB=0 And DD=0 And FF=0 Then
DeActivateSignal(OUTPUT1)
DeActivateSignal(OUTPUT2)
DeActivateSignal(OUTPUT3)
ElseIf BB=1 And DD=0 And FF=0 Then
ActivateSignal(OUTPUT1)
DeActivateSignal(OUTPUT2)
DeActivateSignal(OUTPUT3)
ElseIf BB=0 And DD=1 And FF=0 Then
DeActivateSignal(OUTPUT1)
ActivateSignal(OUTPUT2)
DeActivateSignal(OUTPUT3)
ElseIf BB=0 And DD=0 And FF=1 Then
DeActivateSignal(OUTPUT1)
DeActivateSignal(OUTPUT2)
ActivateSignal(OUTPUT3)
ElseIf BB=1 And DD=1 And FF=1 Then
ActivateSignal(OUTPUT1)
ActivateSignal(OUTPUT2)
ActivateSignal(OUTPUT3)
ElseIf BB=1 And DD=0 And FF=1 Then
ActivateSignal(OUTPUT1)
DeActivateSignal(OUTPUT2)
ActivateSignal(OUTPUT3)
ElseIf BB=1 And DD=1 And FF=0 Then
ActivateSignal(OUTPUT1)
ActivateSignal(OUTPUT2)
DeActivateSignal(OUTPUT3)
ElseIf BB=0 And DD=1 And FF=1 Then
DeActivateSignal(OUTPUT1)
ActivateSignal(OUTPUT2)
ActivateSignal(OUTPUT3)
End If

CODE "G04 P375"
While IsMoving()
Sleep 100
WEnd

DeActivateSignal(OUTPUT1)
DeActivateSignal(OUTPUT2)
DeActivateSignal(OUTPUT3)

CODE "G04 P375"
While IsMoving()
Sleep 100
WEnd

FF=EE
EE=DD
DD=CC
CC=BB

Loop   

End

33

VB and the development of wizards / MOVED: como parar y subir la fresa?

« on: February 01, 2007, 12:09:01 PM »

This topic has been moved to Spanish.
Este topico se ha movido a Español.

http://www.machsupport.com/forum/index.php?topic=2353.0

34

Tangent Corner / Stand alone indexer

« on: January 11, 2007, 11:46:22 AM »

Hello guys,

I have a proyect in which I need a stepper to move a certain amount (always the same) when a signla is sent. Which means I need a stand alone indexer thats sends out lets say, 20000 steps, when an input signal is activated. There is no direction changes, no speed changes, an acceleration profile (trapezoidal) would be nice.

I know I could do this with a PC and mach runing the show, but for a single axis, single move, I think its overkill.

Does anyone know of any circuits, or a comercial unit that could do this. Im sure this would be an easy task for a pic, although im no programer, and no electronics expert.

Regards
Fernando

35

Tangent Corner / Servo inertia calculations

« on: January 09, 2007, 11:38:29 PM »

Hello guys,
I was looking over at the sureservo manual (automation direct servos) and on a sample calculation it states that the ratio between the load inertia, and the motor's inertia should be kept less than 10.

Does anyone know why is this? and does it apply to steppers too?

Regards
Fernando

36

General Mach Discussion / Moving table VS moving gantry

« on: January 05, 2007, 05:38:41 PM »

Hey Guys,
Ima firm beleiver of definite purpose designing when it comes to building CNC machines. What I mean is, the last machine we built is a big router, suitable for well... routing we have done some 3d releif work and v carving, but the size and weight of the machine make it a little unsuitable for that aplication, mainly because of vibrations, nothing that cant be  fixed by adding supports to reduce the shaking, or using quantum in the near future. The machine is big at 12' by 12'.

Lately we were approached to make a thermoforming tooling out of aluminum. Although we were able to do it, i didnt like the machines performance that much, I know I could have taken deeper depths of cut (cutting at 0.010") and at faster feeds (30 ipm right now). but the machine wouldnt allow it. The mold was about 20" by 26".

Now I was thinking, if I were to build a machine just for that kind of jobs, small print (maybe 48" by 48" or something) designed specifically for milling aluminum at decent rates. What would the best aproach be?
I was thinking in using AC Servos at about .85kW 2000rpm, max rapid rates at about 200ipm, with ballscrews al around, 0.2" lead, with a 2:1 reduction, that turns out at rated force of almost 2000lbs, and a max force of 6400lbs. Using HiWin rails maybe 25mm.

And on top of all this, stiffen the hell out of the frame and all components. That is why i was thinking of going with a fixed gantry and moving bed. that way I can stiffen the gantry a lot without concerns for weight.

So basically I am looking for opinions on that aproach, components and the using of a fixed gantry vs going with the moving gantry.

Thanks in advance
Fernando

37

Show"N"Tell ( What you have made with your CNC machine.) / V carved plauqe

« on: December 29, 2006, 10:43:57 PM »

This is a conmemorative plaque for a public school here in Mexico, it is made from a solid surface that we manufacture, the actual color is black with white veins, although you can barely see the veins in the picture.
This is my first V-carve attempt. Its 31.5" by 19.625" by 0.5" thick
Regards
Fernando

38

Tangent Corner / tapered endmills vs router v bits

« on: December 26, 2006, 09:50:38 PM »

Hello,
Im trying to find out if using tapered end mills would work for doing v-bin carving. Im in Mexico, and finding router bits for this aplication is difficult.
Any suggestions on what to use instead of router bits?
I was looking at some 60º burrs, rotary files, and even coutersinks

Regards
Fernando

39

General Mach Discussion / code for feedrate override reset

« on: December 21, 2006, 02:10:00 PM »

Hello,
Is there a code I could put in my g code that resets feed rate override? I would like to add it to the begining of my programs, I broke a cutter today when starting a program and having 300%FRO!
Stupid mistake
Regards
Fernando

40

Feature Requests / Remove buffered outputs

« on: December 15, 2006, 11:44:21 AM »

Hey!
As long as we are requesting stuff. How are we doing with eliminating buffered commands. I tried doing an operator interphase, that had a bunch of buttons, and the operator just placed the workpiece, and pressed a button for the part he was machining. It worked fine, except that when he accidentally pressed a button twice, or pressed another button while the machine was working, at the end of the first operation, the machine imediately continued with the second. Tried all sorts of workarounds and just couldnt do it.
Regards
Fernando