Topics

21

Others / Handy thread chart Freeware very impressive

« on: December 19, 2006, 10:09:23 AM »

This is a freeware program I found out on the web, it includes a text file from the author.  It has full specifications on all the threads I could ever use.

22

VB and the development of wizards / New Turn Wizard work in progress (use with care) Parabolic Curve

« on: December 01, 2006, 04:46:18 PM »

I just finished the first draft of my new turn wizard for doing a parabola.  Check it out, refine it, whatever.  Post a picture if you
actually cut something with it other than your fingers.   If there are some math guru's out there it needs a lot of work. 

23

VB and the development of wizards / turning an ellipse wizard needed

« on: November 09, 2006, 11:11:55 AM »

Anyone got an idea on how to make a wizard for turning an ellipse? 

24

General Mach Discussion / modbus for encoder input?

« on: November 02, 2006, 10:48:42 AM »

Can encoder inputs be use through a modbus input.  I am guessing this won't work because of the speed? 

I have a automation direct plc dl06 I think is the model number and would like to take advantage of all the io.  I am planning on using some outputs for flood coolant, spindle start, dust collector start and whatever else I can think of but would really like to add encoders.

Anyone with any experience on this?

Arn

25

VB and the development of wizards / some new extra turn wizards

« on: October 12, 2006, 11:22:39 AM »

I was wanting to make some novelty items (chess pawns & an ornament stand) on my lathe and needed to turn a taper up to a flat face,  I studied the work done by Brian and Kiran and came up with these.  Use with extreme caution, I haven't tested these very well.  Practice on wood, plastic or air first!

They are also useful if you just want to do a taper and don't know the angle, just the start and stop on x & z.

26

General Mach Discussion / spindle calibration help

« on: November 08, 2005, 01:13:55 PM »

Anyone have any experience with spindle calibration.  I am using the PWM mode to fire a mosfet that charges a capacitor and feeds a voltage to my Sieg 7X12 mini lathe.  I know that my voltage to PWM signal is probably non-linear and thought the spindle calibration would change the gain for the output of the PWM signal.  When I run the auto calibration it goes through it completely and finishes but the graph and operation of it looks erratic, the graph of control output and speed moves even though the speed is not changing and the control output is not changing either until the last few minutes, at that time the graph is pegged out and the control signal changes so fast the motor accelleration never catches up with it.  Is there a way to manually enter the curve if I manually plot the PWM output vs speed.  My circuit works fine and I can change the speed just fine, just would like to fine tune this.

Thanks Zar