Messages

5751

General Mach Discussion / Re: Program hanging

« on: June 05, 2011, 12:51:52 PM »

USB no, PCI yes ,ethernet yes.  The motion cards you see today that work "well" are NOT $100 (;-)

AND the LPT port is still doing fine.

AND Art developed the MESA card series driver as well

Galil, Kflop,dspmc,etc        Can work well "IF" the development continues.

Just a thought, (;-) TP

 

5752

General Mach Discussion / Re: Printer Port Problems

« on: June 05, 2011, 11:52:03 AM »

Dave I normally use Cables to GO :

http://www.cablestogo.com/product.asp?cat_id=3544&sku=16645

(;-) TP

5753

General Mach Discussion / Re: 1 axis jog=smooth 2 axis jog= rough?

« on: June 05, 2011, 11:35:18 AM »

YES I agree that electronic gearing can work BUT you still end up with micro cogging you try toget rid of with high encoder counts (;-) The gearing just uses blocks of pulses instead of one.

YEP here I run 2000 count encoders and end up at 40000 PPI and that is WAY more than is needed to have smooth motion, high resolution @ .000025" ( way more than this ole Bridgeport can use) and 100 IPM rapids.

Just a thought. (;-) TP

5754

General Mach Discussion / Re: 1 axis jog=smooth 2 axis jog= rough?

« on: June 05, 2011, 10:31:02 AM »

At better than 81000 PPI you are long past the point of diminished returns on resolution. Take a look at the resolution of high end commercial machines you won't find many if any that high.

Remember this machine has 20x reduction on the servo. If you don't want to change the encoders then change the 4:1 to 2:1 reduction or 1:1
(;-) TP

5755

General Mach Discussion / Re: Problem with Software/Settings ????

« on: June 04, 2011, 10:46:28 PM »

IF you set up work 0,0 to be the lower left of bed travel facing the front of the machine THEN all moves WILL be positive.  WHere you setup Machine HOME is a totally different thing to where you work from.  I see you refhome to the top left. that sets Machine zero as you say then all move in MACHINE corrds will be neg. BUT you don't WORK in machine coords you work in work coords.(;-)

Note my earlier statement IF your mill is a bed or knee mill it will move the axis BACKWARDS to a GANTRY setup for the same tool positioning.  SO your setup cannot be the same direction wise to your gantry mill/router

Just a thought, (;-) TP

5756

General Mach Discussion / Re: 1 axis jog=smooth 2 axis jog= rough?

« on: June 04, 2011, 10:43:31 PM »

I would change out the encoder to about 1/4 of that. No way can you use that much resolution.  128 encoders would give you less than 1 ten thousand  inch resolution .00009".

Let's be resonable, (;-0 TP

5757

General Mach Discussion / Re: Problem with Software/Settings ????

« on: June 04, 2011, 09:00:38 PM »

Axis travel on a knee type mill and a gantry mill are backwards to each other.

(;-) TP

5758

General Mach Discussion / Re: Probe wiring

« on: June 04, 2011, 08:57:51 PM »

What does the code look like??  What is it that it does , define crazy???

(;-) TP

5759

General Mach Discussion / Re: Printer Port Problems

« on: June 04, 2011, 08:55:14 PM »

Well you have to be carefull with LPT cards not ALL are what they seems to be. Many version take SHORTCUTS and are NOT true LPT parallel cards .

Art turned me on to the LAVA brand cards and they have been faultless and fast. They also have some of the fastest transfer speeds I have seen for an LPT port.

I use the Dual LAVA PCI cards exclusively . They run about $75 but have been worth every penney. I think the single version is about $48

ONE last thought have you play with setting the LPT port TYPE in the computer BIOS. I always set to a standard port.

(;-) TP

5760

General Mach Discussion / Re: Printer Port Problems

« on: June 04, 2011, 06:05:29 PM »

OR the obivious option of running the Machine off the OLD puter and the CAD off the new puter .

(;-) TP