Messages

81

General Mach Discussion / Re: General Q's about Mach3 and AD sureservo drives and smooth stepper

« on: May 07, 2008, 05:13:49 PM »

Yo Jeremy,

a couple of observations...

How are you going to power your 5HP Colombo spindle on Single Phase?  I think once you crack the 3 HP barrier you're pretty much going to need to be in 3 Phase land. 

Also, I'm kinda curious what it is that your going to be cutting?  For a machine that's designed to travel @ 3000 IPM, unless your cutting styrofoam, I don't think that 5 HP is going to be enough.

Just my $.02

Sid

82

General Mach Discussion / Re: General Q's about Mach3 and AD sureservo drives and smooth stepper

« on: May 07, 2008, 10:31:30 AM »

Hey Fellas,

I have been watching this thread as I am also in the planing phase of building a 'large format' router.  I am a little confused about some of the numbers you are throwing around for motor sizing.

Gecko Mariss wrote once in another thread

"So, how do you figure the power you need?

Method 1: You have a plasma table, wood router or some other low work-load mechanism. You have a clear idea of how many IPM you want but your'e not sure of what force you want at that speed.

Pick the weight of the heaviest item you are pushing around. If it weighs 40lbs, use 40lbs. Multiply it by the IPM you want. Say that's 1,000 IPM. Divide the result by the magic number "531". The answer is 75.3 Watts so use a step motor.  Eq: Watts = IPM * Lbs / 531"

Taking the above as 'gospel', according to my calcs to move 150lbs at 3000 IPM you need around 850 Watts.  Seems like the 1KW Med inertia motor would do it with ease.  But, Scott said if you want higher accels go with the 2K.  Is this just to to be able to overcome the inertia in reversing directions frequently?  Is there some formula for figuring where the crossover point betweeen the 1Kw and 2Kw.

I tried working with the Sizing software from AD but it's kinda weird the way the have the rack and pinion config'd (i.e. the rack is the moving part on their sizing software which is not really the way I envision setting up my machine).

Thanks,
Sid

83

General Mach Discussion / Re: changing kernel speed and maximizing travel speeds ?

« on: May 04, 2008, 11:37:15 AM »

Yeah Hood- I was.  Thanks!  Doesn't your head hurt being crammed with all that info up there?   

I was a bit confused- I saw a system the other day that had a Brush DC servo w/ 500 ppr, 20:1 gear box coupled to a 3.3" pinion. and I was wondering why they used the reducer.  But, now I think I get it- without the SS, there is no way to get that kind of resolution (somewhere around .0002 pulse per inch I think) unless you use the gearbox-right?

As always!  Thanks!
Sid

84

General Mach Discussion / Re: changing kernel speed and maximizing travel speeds ?

« on: May 04, 2008, 02:02:13 AM »

Is this with no mechanical gear reduction- I.e. the motor is directly coupled to the lead screw (or other transmission method)?

Just Curious?

Thanks,
Sid

85

General Mach Discussion / Re: Can not get off the limit switch

« on: May 03, 2008, 05:16:09 PM »

Hmmm, OK.  Thanks- ya learn sumpthin new everyday!

Sid

86

General Mach Discussion / Re: Can not get off the limit switch

« on: May 03, 2008, 05:04:16 PM »

Do you have the Limit Override enabled in the Config--->Ports & Pins ---> Input Signals?  I had the same prob with limit overides until someone clued me in to enabling it.

HTH,
Sid

87

General Mach Discussion / Re: m3 not always recognized

« on: May 02, 2008, 11:25:33 PM »

Wow, nice Wife!  Bon Apitit!

I seem to recall having similar internittent M3 issues around the ver 2.X times.  You might want to give ver 3.41 a try I think things have progressed a bit since back then!  But then again.. "If it ain't broke..."

Regards,
Sid

88

General Mach Discussion / Re: m3 not always recognized

« on: May 02, 2008, 07:42:33 PM »

What version are you runing?

89

General Mach Discussion / Re: Macro Code

« on: May 02, 2008, 02:01:37 PM »

Or another idea....

Don't know about your B.O.B.  but if you can come up with an extra input pin, put the touch plate on a seperate pin that is discrete from the rest of your home/limit system (as is done with a touch probe system).

Also, I have found that 4 digit macros are 'funky' sometimes, I try to stick with 3 Digits (650 is my all time Fav!)

Sid

90

Video P*r*o*b*i*n*g / Re: setting up cammera and laser

« on: May 02, 2008, 10:42:08 AM »

Pretty Nice looking camera mount Tom!

Press and hold the 'Alt' button then press the 'PrtScn' button- this will capture your screen to the clipboard.  You can then usually open a graphic editor (like paint) and paste the clipboard, save the file & upload.

Sid