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Messages - Chip

General Mach Discussion / Re: Rotary and Linear Accel Trouble
« on: November 25, 2006, 02:18:44 PM »
Hi, Patricktoomey

There are some issues that need to be addressed in the software I think, Try below setting's

Set your F speed to F16200, I now it doesn't make sense, F100 should be 100 %.

The A axis is probably holding you up, This will allow your other axises to limit cut speed,

Adjust A axis F speed down to get the actual cut speed where you want it.

How many step's dose it take for 1 full turn of your A axis, what is the reduction ratio.

Hope this Helps, Chip

LazyCam (Beta) / Re: mach turn and lazy cam
« on: November 23, 2006, 09:27:12 PM »
Hi, Judah

Not at this time, there has been some discussion that in the future it will be done.

I think there to many Iron's in the Fire right now, looking for it also.

Thanks, Chip

General Mach Discussion / Re: rotary axis setup
« on: November 23, 2006, 06:01:32 PM »
Hi, Chaoticone

The 25kHz isn't rely the problem it's the way Mach treat's linear versus Rotational setup.

If I get some time later, I'll post 2 different way's to look at it, then it will be clear

Hi, Graham, This is very true.

Thank's, Chip

General Mach Discussion / Re: rotary axis setup
« on: November 23, 2006, 04:47:33 PM »
Hi, Chaoticone

That's true a non micro stepping A axis would help allot on My R-Table, it would decrease the resolution but balance out the large difference

in A verses X,Y,Z, step's required, would be 6.67 to .66 Step's Per. Minute, more or less.

If I've done the Math properly, Still need's to be per 1 deg. for any speed though.

Just some trade offs.

Thank's Chip

General Mach Discussion / Re: rotary axis setup
« on: November 23, 2006, 03:03:39 PM »
Hi, Graham

I think that work's fine for Linear, but unless there have been changes in the last couple of rev. of Mach3R2.0 to get A axis Rotational

speed up you need the 1 deg value in step's in A unit's Motor Tuning. Full turn step's divided by 360 = value.

May be fine with A axis that have closer step's ratio's (A10,000, X,Y,Z,2000) not for (A144,000, X,Y,Z,2000) Step's, very very slow.

I don't really understand why its not compensated for in the software so actual step's per 1 full rotation of a axis could be used in setup.

Way, way beyond Me.

Thank's, Chip

General Mach Discussion / Re: Bridgeport extrak retrofit
« on: November 23, 2006, 01:30:35 AM »
HI Rrogerbsstt

Haven't try-ed this but I'll give it a shot.

First goto Config, Port's Pin's,Motor Output's Enable A axis leave the Pin's and Port's 0, click Apply.

Now click on Encoder MPG's Tab, Set  Enable MPG # 1 Set A-port to 1, B-port to 1, then use 2 unused pin's on port 1 for your A, B, encoder input pin's,

Pin's 10-13,15 are the only one's you can use, Set the Count Unit's to 1 - 4, probably, 4 to calibrate, Click on Apply again then OK.

Now goto Config, General Configuration, Angular Properties, un-check A-Axis is Angular Click on OK

Then Hit the Tab-Key for Screen Pindent, Select Jog Mode to MPG, Click on Alt A, Click it till it is on A axis.

That should Work, There is Probably a better way to do this more perminant, Just a start to get you going.

Infact you can use the spindle to MPG your X,Y,Z, axis's. By selecting them, Pretty Scary HU.

Be Care-full, Chip

General Mach Discussion / Re: Slave A & X problems.
« on: November 22, 2006, 05:04:36 PM »
Hi, Joe

Did you set the Port to 1 for your A axis, Step Port, Dir. Port  in Config, Port's and Pin's Motor output's.

Under Config, Slave Axis, set A axis to X then OK.

Hope this Helps, Chip

General Mach Discussion / Re: rotary axis setup
« on: November 22, 2006, 04:19:04 PM »
Hi, All

The diameter set's the feed rate, a 1 in. dia and 10 in dia. will have different feed rate's so the actual surface cut speed will be the same.

Just an example of my setup, 1 full turn of your table (the number of step's it takes) divided by 360 = 1 degrees step's required.

As far the .2 if it doesn't divided out evenly then, I think Mach keeps track of the number else, you would have cumulative error in 1 full turn.

Your's may be even number's

Thanks, Chip

General Mach Discussion / Re: Feed Rates
« on: November 21, 2006, 04:11:17 PM »
Hi, Ernie

Under Config, State, you can add an F400 to the Initialization String window after the G80, This will set your start-up F speed to 400 instead of 6

Hope this Helps, Chip.

General Mach Discussion / Re: rotary axis setup
« on: November 21, 2006, 03:51:46 PM »
Hi, AlanETM

On my Sherline rotary table it's 144072 step's pre one full turn, divided by 360 = 400.2 per deg.

Velocity 2500 Acceleration 500 the blended speeds, blended and feed's read funny though actual rate seems fine, don't forget to set the A axis dia. in settings page.

Hope this Helps, Chip