Messages

1

General Mach Discussion / Port 2 not switching to inputs

« on: June 06, 2011, 04:50:10 PM »

My port 2 will not read inputs on pins 2 to 9.
The brake out board  checks out OK the pins at the db24 connector go low and high but mock3 diagnostics all leds are on.
Port 2 is checked for inputs. 


Robert

2

General Mach Discussion / Re: Can two 36v power supplies be used in series to get 72v?

« on: April 25, 2009, 01:19:59 PM »

If you use the voltage doubler you will have both 72v and 36v outputs. 

Robert

3

General Mach Discussion / MPG on print port 2

« on: April 25, 2009, 02:36:34 AM »

I assigned the MPG to the MPG DRO 1 , the axis selector switch and scaling switches to OEMTRIG 1 through 6.  In jog mode MPG when I click on MPG axis ALT A each axis will move when selected.
How do you assign the axis  selector switch to set the proper axis and how to set the 1x ,10x and 100x scaling factors?

4

General Mach Discussion / Re: What size motors?

« on: April 25, 2009, 12:21:27 AM »

I just got my Sharp mill working on cnc. I used the Keling KL34H2120-60-4B  steppers 1200in.  Direct drive with Ruland couplings only 2 brackets for the x ,z and 3 for the y.
The Sharp is about a third larger than the Bridgeport. If you have ball screws I thank that the 1200in steppers would work just fine. I have not been able to find ball screws for the Sharp yet so am somewhat limited on max speed but it is much faster than hand cranking. 

5

General Mach Discussion / Re: Can two 36v power supplies be used in series to get 72v?

« on: April 24, 2009, 11:04:07 PM »

You can use a voltage doubler circuit if your transformer has extra current capacity.  Get some 40V 22000 mf capacitors , remove the +wire from the Bridge rectifier and connect it to one side of the AC transformer lead this will be your 36v positive lead  . Connect the  minus side of the new capacitors to the +side of the old capacitor connect the + terminal of the Bridge Rectifier to the + side of the new capacitors this will be your 72v line. 

6

General Mach Discussion / Re: HOME SWICH NOT REVERSING and LIMIT SWITCH

« on: April 08, 2009, 03:25:23 PM »

Thanks that fixed it.   Now I will try to cut the roadrunner.  

7

General Mach Discussion / HOME SWICH NOT REVERSING and LIMIT SWITCH

« on: April 08, 2009, 04:58:17 AM »

Retrofitting a Sharp mill. I have the x-- limit and x home on one switch with a separate switch for x+. The limit override led is on.
 When I reference x home, X goes to home and stops but will not back off the switch and the limit switch is triggered. To get off the
switch I have to turn off the X-- input. Then when I home it will home and zero the DRO but not move off the switch.
Same problem on the Y and Z
  

 Robert

8

General Mach Discussion / Re: New people welcome !! Come in here and introduce your self!

« on: March 29, 2009, 04:54:52 AM »

Hi,

I am converting a Sharp Manual mill to CNC. Just got my licence for Mach3. Hope to have the X and Y running today.