Messages

11

General Mach Discussion / Re: Turn Eccentric Wizard

« on: March 29, 2010, 02:50:21 PM »

Sounds like its back to 4 jaw chucks and dial gauges then.
Thanks for the inputs.

Clive

12

General Mach Discussion / Re: Turn Eccentric Wizard

« on: March 25, 2010, 03:33:14 PM »

Granted that the revs would be slower than normal  but the acceleration would be gradual and the changeover point would be at the point with the slowest movement.
Just thought of the downside,  backlash or would the compensation take it out

13

General Mach Discussion / Re: Turn Eccentric Wizard

« on: March 25, 2010, 02:50:29 PM »

You say that it would have to be very fast in X but is it not similar to the way a copy lathe worked also they made rifle stocks at springfield armoury in Massachusetts by a similar method in the 1800s (not using CNC though, not even an early version).
I am sure that some smart person could do the maths.
Is it also not the same sort of control you get when cutting threads?

Clive

PS. I am not being contentious just interested.

14

General Mach Discussion / Turn Eccentric Wizard

« on: March 25, 2010, 07:44:47 AM »

I am doing a project where I need to turn an eccentric on a shaft.
Being a little idle and not wishing to set up a 4 jaw chuck I wondered if anyone had a written a wizard?

Clive

15

General Mach Discussion / Re: Setting Up for index pulse

« on: February 21, 2010, 05:20:06 AM »

Many Thanks Hood and Rich
Spot on.
Worked first time.
I checked the rpm and that is correct also.
Incidently I bought a tacho for £15 delivered from ebay.
Having now got the electronics bits working its on to limits and Estop.

Thanks again
Clive

16

General Mach Discussion / Re: Setting Up for index pulse

« on: February 20, 2010, 05:38:40 PM »

Here goes.
I got here but was concerned about the link

17

General Mach Discussion / Re: Setting Up for index pulse

« on: February 20, 2010, 02:30:49 PM »

Sorry to be a pain Rich but when I attach it shows all my path names

18

General Mach Discussion / Re: Setting Up for index pulse

« on: February 20, 2010, 12:26:13 PM »

Rich
How shall Isend my xml

Clive

19

General Mach Discussion / Re: Setting Up for index pulse

« on: February 20, 2010, 10:52:13 AM »

Hi Rich
I typed m3 in the mdi line. Still no output

Clive

20

General Mach Discussion / Setting Up for index pulse

« on: February 20, 2010, 10:22:36 AM »

Hi
This weekends problem is Index pulse problems
I have a cnc4pc index pulse system on my lathe and the sytem pulses when the lathe is running.
The led on the unit changes speed when I change the motor speed (manual).
The meter shows a voltage change at the breakout board.
I have set the Index as port 1 and pin12 and ticked use spindle feedback in spindle set up.
In diagnostics index is green.
When I run it no rpm is shown it sits at zero.
I only have the output wire connected to the breakout board as it already has a ground. (I tried one and it made no difference.
Any clues please.

Clive