Messages

21

General Mach Discussion / Re: VFD Suggestions

« on: June 10, 2009, 03:45:05 PM »

I'll give it a go.  The guys at Siemens can't tell me (?), so I'm asking around.

22

General Mach Discussion / Re: VFD Suggestions

« on: June 10, 2009, 03:17:51 PM »

I've been through this with the guys at Automation Direct.  They tell me that it is nearly impossible to turn a large spindle below about 1%, and that's what I'm getting.

What type of spindles / VFDs do you run?

23

General Mach Discussion / VFD Suggestions

« on: June 10, 2009, 11:52:38 AM »

I'm currently using a 15HP ELTE spindle and driving it with a GS3-4015 VFD from Automation Direct.

My problem is that I can't get the spindle to run below about 100 RPM.  The VFD just can't get the job done.

Anybody out there know of a VFD that will actually drive a 15HP spindle down to 10-15 RPM?

24

General Mach Discussion / Re: Rough Transitions

« on: June 09, 2009, 08:52:04 AM »

The programs were generated by SheetCam,  One version is an outside kerf, one is an inside kerf.

25

General Mach Discussion / Re: Rough Transitions

« on: June 07, 2009, 12:40:23 PM »

The machine is an new zero-backlash ballscrew driven router, so backlash is absolutely not the problem.

Also, I'm cutting "in air".  There is no material being cut at all.  This is just raw motion.  CCW - excellent, CW - bounces froma line to an arc.

Is it possible that this is some sort of setting?

26

General Mach Discussion / Rough Transitions

« on: June 05, 2009, 01:53:11 PM »

Anybody have or know how to fix this issue?

I made a 4" square and rounded the corners with a 1" arc radius.  If I run this part kerfed to the outside, it moves CCW and it is perfectly smooth all the way around.  However, if I run the same part kerfed to the inside, it moves CW and every transition from a line to an arc makes a noticable jolt that shows up on anything being cut.

Since the CCW paths work perfectly, I can't see how this is a simple setting change.  Any ideas?

27

General Mach Discussion / Re: Making a Charge Pump

« on: June 02, 2009, 05:03:51 PM »

Got it, Thanks

28

General Mach Discussion / Making a Charge Pump

« on: June 02, 2009, 02:00:18 PM »

About a week ago I found diagrams in the Forum for two versions of a Charge Pump that you can make and use.  Now, I can't find them anywhere.

Anybody out there know where these drawings are?


Thanks

29

General Mach Discussion / Toolpath Display

« on: March 12, 2009, 12:11:47 PM »

As a part cuts, the display shows what has already been cut by leaving a light blue trail of dots superimposed over the toolpath display.  This has always worked in the original screens that come with a new download of Mach.

However, now the "already cut" dots are not staying on the display.  It will show for 2-3 contours usually and then reset.

Is this a bug, or is it a problem with my computer?

Anybody else out there have this problem?

30

General Mach Discussion / Re: Another Tool Diameter/Wear Question

« on: January 13, 2009, 01:03:40 PM »

Graham - just to be sure (and for other readers as well):



G10 L1  -  This is the command to tell Mach to post an offset?  Does the L1 imply tool #1?

P1  -  I assume this tells Mach to offset Tool #1?

X0.001  -  This tells Mach to reduce the diameter by 0.001"?