Messages

2321

General Mach Discussion / Re: Spindle timing/index

« on: December 15, 2006, 03:58:53 AM »

My machine uses a latch.

I set up a macro to do spindle index.

I have to fire the solenoid, creep the spindle round and kill the motor when the switch on the solenoid triggers.  its a bit faffy to set up and get the timing right but when its set it works without a fault.

I use it for tool change index too.

I don't know how it would work with back bore cycle, I do them with long hand code.

Graham.

2322

General Mach Discussion / Re: LINKS UPDATE ( PLEASE SUBMIT YOUR LINK)

« on: December 15, 2006, 03:22:02 AM »

Hi Benny,

I am surprised to see there is no category in the links for tooling and materials suppliers.  Could these be added? 

Graham.

2323

General Mach Discussion / Re: motor tuning

« on: December 14, 2006, 07:39:08 AM »

You can calculate the spindle speed using this formula :-

In imperial measuments.

Alum, Brass, Copper, Plastics = 200ft/min
Mild steel                           = 100ft/min
Alloy steel                          = 80ft/min
Stainless Steel                    = 40ft/min
Titanium                            = 30ft/min
High tensile alloy steels        = 15ft/min

RPM =      S(ft/min)
         --------------------------
         0.2618* Cutter Dia

So in plastic with a 1/8 cutter

RPM =     200
         ----------------
        0.2618*.125

RPM = 6116

Graham.

2324

G-Code, CAD, and CAM discussions / Re: Help converting Gerber/eagle soldermask to G-Code

« on: December 14, 2006, 04:16:29 AM »

If you use the M8/M9 coolant commands to turn on/off your dispenser you should be able to get your cam post to turn on the coolant on every z down and turn off on the  z up command.

Graham.

2325

G-Code, CAD, and CAM discussions / Re: Zero Radius Arc

« on: December 14, 2006, 03:59:53 AM »

I looks to me like you generated the code with a tool radius the same size as your internal rads.

re-generate the code using a smaller dia cutter

e.g. If your smallest rad is .250 then use a .125 dia cutter then your I and J will have values other than zero.

Your second problem may be mach is set to ABS I & J when it should be INC I & J, or the other way round.  You can change this in the Config.


Graham.

2326

General Mach Discussion / Re: Rotary Axis Problems

« on: December 12, 2006, 03:29:44 PM »

The only obvious thing in your code is that you don't have a feed rate set (NO'F')

Graham.

2327

General Mach Discussion / Re: Rotary Axis Problems

« on: December 12, 2006, 03:13:04 PM »

What did you use to generate the code, DXF file?

if so post it here.

Graham.

2328

General Mach Discussion / Re: motor tuning

« on: December 10, 2006, 06:38:07 PM »

I converted the whole geometry into a 3d polyline to get rid of the lumps and bumps.

Try it as it is and let me know what happens.

If you need to rough it out first just off set the Z axis up by about 24mm and then run a cut, then keep dropping it by 3mm or so and re run again.  keep doing this until you get back to the proper depth.

Graham.

2329

General Mach Discussion / Re: Automatic tool changer

« on: December 10, 2006, 03:55:00 AM »

Have a look here:-

http://www.cadcamcadcam.com/index.asp?PageAction=VIEWPROD&ProdID=10

Graham.

2330

General Mach Discussion / Re: Mach3 going off course of cut

« on: December 09, 2006, 09:31:42 PM »