Messages

2051

General Mach Discussion / Re: need help! Newbie's problems

« on: May 23, 2007, 12:53:56 PM »

Hi,

you need to set the 'steps per' to 10 times what they are now.

Graham.

2052

General Mach Discussion / Re: User macros that produce problems...

« on: May 23, 2007, 12:48:05 PM »

Are your macros in the profile you are using?

or you can try this.

in your macro type :-

If not IsLoading() then
  activatesignal(output1)
end if

Graham.

2053

Tangent Corner / Re: How fast can I go? Safely...

« on: May 23, 2007, 03:33:58 AM »

Here are some formulas :-

D     = Diameter of cutter
T     = Number of teeth
RPM = Revs per min
F     = Feed
FT   = Feed per tooth
S     = Peripheral speed of cutter
PI    = 3.1416

Cutter speed

S (ft/min) = D*PI*RPM
                ________  = 0.2618D*RPM

                      12

S (m/min) = D*PI*RPM
                  ________
                     1000

Cutter revolutions


RPM = S (ft/min)
          ________
           0.2618D

RPM = S (m/min)*1000
         ______________
               PI*D


Feed per tooth

The suggested feeds are based on 1*dia for axial depth and 0.5 * dia for radial depth of cut.

Cutter dia             Feed per tooth

inch     mm           inch     mm

5/64    2.0           .0003   .0075
1/8      3.0           .0005   .013
1/4      6.0           .0010   .025
1/2    12.0           .0015   .037
1       25.0           .002     .050

FT =           F
             ______
             T*RPM

To increase axial depth to :-

1-1/2 *D reduce feed by approx 30%

2 * D reduce feed by approx 50%

To reduce radial depth to :-

1/4 * D increase feed by 200%

1/8 * D increase feed by 250%

Cutter feed

F = FT*T*RPM

Graham.

2054

General Mach Discussion / Re: x,y,z zero changes while machine is running program

« on: May 21, 2007, 04:28:20 PM »

Could be vibration, system noise, bad cables.

Graham.

2055

General Mach Discussion / Re: Edge Finder Dia offsets wrong direction and Sherline Y axis measurements

« on: May 17, 2007, 02:47:39 PM »

If you have 1.25 in the edge finder dia, what happens if you enter -1.25 in the dia?

Graham.

2056

General Mach Discussion / Re: Newbe questions

« on: May 17, 2007, 02:39:18 PM »

The G-Code determines how big the part is going to be, if you go to toolpath the size of the part is shown in the dro's top right 'program limits'

The datum for the stock is set in the dro' by setting them to zero or by G54 to G59 to set a global datum that can be called at any time.

Graham.

2057

General Mach Discussion / Re: Edge Finder Dia offsets wrong direction and Sherline Y axis measurements

« on: May 17, 2007, 12:11:05 PM »

Have a look at this thread.

http://www.artsoftcontrols.com/forum/index.php?topic=1725.msg9977#msg9977

Graham.

2058

LazyCam (Beta) / Re: Lcam 2.0...

« on: May 17, 2007, 06:03:59 AM »

Has the new install got .net on it?

Lcam needs it.

Graham.

2059

Third party software and hardware support forums. / Re: Need help selecting "breakout board " product.

« on: May 16, 2007, 04:39:08 PM »

There is a lot of info in the g-rex part of this forum. It may be a good idea to start there.

Graham.

2060

General Mach Discussion / Re: no movement, limits don't work, ????????

« on: May 16, 2007, 03:19:09 AM »

Hi Michael,

welcome, you are in the right place to get it sorted.

Are you setting up 2 or 3 axis?

What have you got set in ports and pins for your servos?

Graham.