Messages

2631

General Mach Discussion / Re: True 45 Degree angles on XY axis

« on: February 24, 2006, 01:04:17 PM »

Hi,

do you have back lash in the x and/or  y axis

is the cutter running off before the end of the angle

Graham.

2632

General Mach Discussion / Re: Back Lashing??

« on: February 08, 2006, 03:30:16 PM »

Hi All,

even if you set the backlash in Mach3 this will not remove the lash it just compensates for it on the movements,  if the cutter is pulling the table you will still get errors.

If you take a shallow cut just deep enough to be able to measure it do you still get the error?

Also

Is the cutter running true?

Is the cutter too far out of the collet and flexing?

Is the Z axis square to the table? if not you need to trapan the table with a clock and set it square.

Graham.

2633

General Mach Discussion / DC Spindle drive question

« on: February 07, 2006, 05:53:53 PM »

Hi All,

my lathe is fitted with a 3/4 HP spindle motor driven by a KB Electronics KBLC-240-D variable speed unit.  My question is this :- Should the spindle run at the same maximum speed in CW and CCW rotation.

Mine will do 2500 rpm CCW and only 1200 CW (reverse)

The lathe manufacturer (Warco Ltd) say this is normal,  its the first time I have seen this on a vari drive.

Any comments?

Thanks

Graham.

2634

General Mach Discussion / Re: Current point same as end point on line x

« on: January 26, 2006, 04:31:06 PM »

Hi,

Is your program running Inches or MM, Absolute or Incremental?. The sample has no start up code to say which.

in a G01  X.. Y.. ,G02 X.. Y.. R.. ,G03 X.. Y.. R.. moves it is not a start point its an end point, starting from the last point the machine was at, that is why in your code you get an error from Mach, it has no where to go to, so it can't calculate a radius with an angle of zero.

Graham.

2635

General Mach Discussion / Re: Current point same as end point on line x

« on: January 25, 2006, 03:59:59 PM »

Hi,

just a thought, is the line you are cutting one complete polly line or is it broken into segments?

On our system we have to join all the geometry together into a continuous line or we get this problem.

Graham.

2636

General Mach Discussion / Re: Spindle speed control

« on: January 16, 2006, 04:33:45 AM »

Hi Vmax,

It is a KBLC 240D (4771B) board.  I will try the KB Electronics site again.

Graham

2637

Newfangled Solutions Mach3 Wizards / Re: Teach Wizard A Bit more

« on: January 15, 2006, 05:37:50 PM »

Hi Folks,

Why not use the machine to do the moving.
 
Put the output of the photo cell to an input pin so it triggers when it sees white.

Connect the photo cell to the spindle.

move to a start point on the template.

Then using an incremental program move in 1mm arcs until the switch changes.

Record the machine position.

Move again.

If I am talking crap please tell me and I will shut up.

Regards

Graham.

2638

General Mach Discussion / Re: Spindle speed control

« on: January 15, 2006, 05:22:57 PM »

Sorry folks, I may have been economical with the facts here.

The spindle is DC drive

The drive card is a :-

KB Electronics KBLC-240D (4771B)
Input 115/230 VAC
Output 0-90/180 VDC
Rated 6.0 ADC

I am asking the questions as the KB Elec. site seems to be off line, so this is making it very difficult to fine any data on this unit.

The only site I can find with anything like it is Chinese and I am not fluent in Chinese or Googles translated gibberish.

Thanks

Graham.

2639

General Mach Discussion / Spindle speed control

« on: January 15, 2006, 10:38:08 AM »

Hi All,

My lathe has a variable speed controller that is operated by a rotary resistor that has a value of 4K7, my question is, can I connect the wires from the speed control into the parallel port without any other resistors.

Also it has a collar round the spindle with slots in and a infra red detector with 3 wires from it, can I also use these for the pulse count.

Thanks

Graham.

2640

Newfangled Solutions Mach3 Wizards / Re: Teach Wizard A Bit more

« on: January 15, 2006, 08:56:50 AM »

Would it not be possible to connect a photo diode and do like robots do and search the line and follow it with a macro program.  you could move the x and y axis in say 1mm increments finding the line centre and recording the points.  If the drawing was drawn 5 times size and scaled after the accuracy would be quite good.

Graham