Messages

61

General Mach Discussion / Re: Cutting wrong dimensions in only one spot

« on: October 30, 2019, 10:39:18 AM »

Can you post your Gcode for the lobe ?

(;-) TP

62

General Mach Discussion / Re: Using Y axis for a Rotary table ?

« on: October 26, 2019, 09:41:12 PM »

Here is a start.  http://cornlathe.billooms.com/index.html

(;-) TP

63

General Mach Discussion / Re: Using Y axis for a Rotary table ?

« on: October 26, 2019, 09:30:41 PM »

OK a ROSE ENGINE. Those are complicated hammer knockers.  It can be done several ways with CNC using XYZ and C as teh rotary for rotation of teh Cutter bit basically as drag engraving and doing it with tangent cutting with teh spindle itself rotating to follow teh bit travel direction. Mach3 can do it.

As rotary engraving it is a simple process for teh machine but not so easy CAM wise to genreate teh Gcode.

(;-) TP

64

General Mach Discussion / Re: Using Y axis for a Rotary table ?

« on: October 26, 2019, 08:01:46 PM »

V shaped lathe tools cut both directions (;-) This looks more like a TURN application rather than a Mill function.

IF you are engraving have you thought of using drag type engraving bits ?

Do you have a picture of what the finished part looks like ?

Just a thought , (;-) TP

65

General Mach Discussion / Re: Cutting wrong dimensions in only one spot

« on: October 26, 2019, 07:52:45 PM »

If you are cutting cam lobes then teh Black line is bad code. Teh acel / Deacel ramps should be symetrical on each side of teh lobe. The red line appears to be more symetrical than teh black line. The black line has an inverted ramp which is Bad lobe design in most cases.

From what data did you plot the black line. I would like to see teh Gcode that cut it.

Just a thought, (;-) TP

66

General Mach Discussion / Re: Using Y axis for a Rotary table ?

« on: October 25, 2019, 07:05:59 PM »

I don't follow you. I have done this many times over the years teh rotary can rotate 360 degs amd follow teh Y toolpathing as it is only as big of an area as teh circumference of teh part. The rotary can move both directions. I have even used sheetcam to makes xy cuts on a rotary with plasma cutting.

Unless there is something I am missing on your project. Do you have a picture of a part ?

(;-) TP

67

General Mach Discussion / Re: Using Y axis for a Rotary table ?

« on: October 25, 2019, 10:41:30 AM »

Show us a picture of what you are doing. There is always a way . It could be as simple as just using the rotary as the Y axis. In sheet cam you would limit the size of the drawing in Y axis to the size of the circumference of the disc. Then simply cam it as XYZ and run it as XYZ.

(;-) TP

68

General Mach Discussion / Re: Another tool zeroing...but unique...

« on: October 13, 2019, 09:42:18 PM »

The probing input HAS to be an independant input. It cannot be combined with limits or homes.

Just a thought (;-) TP

69

General Mach Discussion / Re: How to stop servo spindle gracefully on Estop or stop button?

« on: October 12, 2019, 11:05:34 AM »

The way we did this in the past was to simply disable teh Spindle drive when using teh Estop. You would first disable teh drive then ESTOP from code in teh estop button. You would do the same with teh STOP button.  This prevents teh spindle from an emediate stop which tends to unscrew teh chuck from teh spindle shaft. Or in your case faults teh spindle drive.

OR you could reduce teh spindle speed by code to a level that will not trip your drive THEN apply Estop or Stop.

Just a thought, (;-) TP

70

General Mach Discussion / Re: losing steps but somehow gets back to 0.

« on: October 08, 2019, 05:03:00 PM »

I would look at the Steps Per settings for that axis. Missing steps would not return to zero and most times a loose connector will not return to zero. It is possible the XML got corrupted and the value is now wrong.

Just a thought , (;-) TP