Messages

481

General Mach Discussion / Re: Go Home

« on: February 03, 2011, 08:11:16 AM »

Thats how I had it set up originally because I have limits on all four screws

Are you driving two of the screws with one motor or do you have a separate A axis?  If you're using a slaved axis to drive both sides of a gantry, for instance, the slaved axis will have to have it's own homes switch.  The other three can be on the same switch, but the A (slaved axis) must be on a separate home switch.

482

General Mach Discussion / Re: Need Help with Cam Software!!!

« on: February 02, 2011, 10:48:02 PM »

I use ArtCAM occasionally.  Vectric 3D is about the same thing for a fraction the price.  That would be a good choice for artistic type reliefs.  For 3D engineering drawings, I like Rhino, which does export STL files.

483

General Mach Discussion / Re: Need Help with Cam Software!!!

« on: February 02, 2011, 07:52:57 PM »

Where are the STL files coming from?  Can you just export them in a format that Alibre can import?

484

General Mach Discussion / Re: Power Supply Unit

« on: January 30, 2011, 07:53:22 PM »

If you bought 6 of these 15500uF 25V capacitors, wired 2 sets of 3 in series and then took those 2 sets of three and wired them in parallel, you'd end up with the equivalent of 1 capacitor of 31000uF @ 75V.

If I'm not mistaken, the total capacitance in a circuit with capacitors in series is reduced.  If I'm figuring right, the total capacitance for three 15500uF caps in series would be about 5200uF.  To maintain a total capacitance of 15500uF you would have to have three 46500uF caps.  That said, I'm not sure total capacitance even matters that much in a power supply.

In the above example, the 2 sets of three would equal about 5200uF each then putting those sets in parallel would raise the total capacitance to about 10400uF.

485

General Mach Discussion / Re: "run from here"

« on: January 22, 2011, 12:08:09 PM »

Why are you using run from here?  Are you having to stop the program for some reason and restart it in the middle of a run?

486

General Mach Discussion / Re: Stepper moving in one dirrection only

« on: January 22, 2011, 09:50:51 AM »

Did you try swapping the inputs to see if the problem followed? 

487

General Mach Discussion / Re: Stepper moving in one dirrection only

« on: January 22, 2011, 09:33:15 AM »

That would be the culprit then.  I've tried a few of those eBay boards over the years and haven't got anywhere with them.

488

General Mach Discussion / Re: Stepper moving in one dirrection only

« on: January 22, 2011, 09:20:03 AM »

Are the drives integrated into the board as well?

489

General Mach Discussion / Re: Stepper moving in one dirrection only

« on: January 22, 2011, 09:04:21 AM »

You know the step and direction signals are correct coming out of the PP.  Perform the same check at the drive (coming out of the BOB).  If the signals are still good coming out of the BOB, then it's either the drive or the motor wiring.  Next, swap drives.  Put Y drive on X terminals on the BOB and X on Y.  If that fixes it, it is the drive.  If it doesn't, it is something down steam of the drive, which leaves motor wiring or a bad motor.

Seeing as how it failed overnight with no system modifications, I'd be looking at the Chinese BOB.

490

General Mach Discussion / Re: Config Question

« on: January 21, 2011, 08:38:58 AM »

I'm not sure when it became available, but I'm using 3.042.036.