Messages

11

General Mach Discussion / Re: Can these servo drives be used with Mach3 URGENT

« on: January 14, 2011, 06:33:17 AM »

Please don't start bitching at each other.
Everybody can have valued input and choice of opinions is great

As a relative newbie I value any input / help I can get

Is there anywhere to get used controller's as mentioned above, nothing at all on eBay.

I have allready made some mistakes buying useless "Bargains" and want to avoid that .

Cheers John

12

General Mach Discussion / Re: Can these servo drives be used with Mach3 URGENT

« on: January 13, 2011, 03:11:53 PM »

Thanks for the replys

The costs mount up verry fast in the servo area.

$500 pluss just for the boards , I dont realy see why they have to be so much more than large stepper systems.

13

General Mach Discussion / Can these servo drives be used with Mach3 URGENT

« on: January 13, 2011, 12:36:27 PM »

Hi all and a happy new year

Can these drives be used with Mach
I know I would need to change the step direction to anolog +/- 10v  , perhaps some tips on that?

I am new to servo drive side of things

http://www.a-m-c.com/download/datasheet/be25a20i.pdf

Thanks for any help

John

14

SmoothStepper USB / Re: setting up encoders with smooth stepper. Basic help needed

« on: December 28, 2010, 09:11:57 PM »

Such is life

I wanted a rolls royce for £50 and ended up with a rolls can'ardly!

15

SmoothStepper USB / Re: setting up encoders with smooth stepper. Basic help needed

« on: December 28, 2010, 08:15:52 PM »

Thanks for the reply

It is a real shame that ther is not a more detailed manual for SS after it has been a strong part of Mach for quite some time now.

I am reluctant and financially embarased to have to purchase the add on board to achive what ought to be an easily implimented part of SS

I know Mach is not and doesnt pretend to be closed loop but by now this kind of routine ought to be easily implimented by the likes of SS, after all it acsepts encoder input so it ought to be easily implimented.  Perhaps I am expecting too much.

John

16

SmoothStepper USB / setting up encoders with smooth stepper. Basic help needed

« on: December 28, 2010, 12:57:37 PM »

Hi all

I have some basic questions about using encoders with SS

I have two encoders with a,b,i , 5v,& ground wires. Single ended I believe

I believe I connect to port 3 pins 1,2 3 and 5v, ground

set up Mach input encoders to port 3  a pin 1,  b pin 2


How do i see any result of the encoder IE a position box

How do I tell mach the resolution of the encoders


can I set a pause if the encoder count and Mach's position differ by X

Thanks for any help

John

17

General Mach Discussion / Re: Unstable stepper pulse

« on: December 01, 2009, 06:00:39 AM »

Ammusing sideline on language, reminds me of the 70's when I spent a couple of years in Canada and regularly visited the States. The same word had compleetly diferent meanings. Broadminded, Chips, Gearbox etc,etc.
Anyway, I have tried the optimi(z)sing and though it seems a little better,but it's still there.
My board is an Asus P5E-VM HDMI, 3gig 2core pent' chip, 3gig mem.  It does not have a printer port so on a pci card.

I will try to give a full description of the setup and issues.

Drive 1
IMS IB106.   24v - 80v,  1 - 6 amps,  Full or 1/2 step.
I have 3 of these and they are new.

Drive 2
Superior electric, Slo-Syn, SS2000MD7,  24v - 75v,  1 -7amps,  2 - 100 resolution.
Supposed to be new but I have doubts.

Motor 1
Astrosyn,  L281,  3v, 1.7 amp, 15Kg cm,  Hybrid
I have 2 of these new

Motor 2
Pacific Scientific, Powermax, P22RXA LDS NS 02,  2.7v,  4.6amp, unipolar.
I have 2 of these used.

Motor 3
SuperiorElectric, Slo-Syn, M112 FJ 319B (same as8018 I think) 2.1v, 9.2amp,  840 oz in
Just the one, used

Again I have tried all combinations, with the same results. A lot better than original as I sorted out the diferent logic pin needs of the diferent Drives.
They all produce exacltly the same results.

As I said befor, the drive test say's excelent in all frequencies.

The behavior of the motors is not bad but there is a definate missing beat, slight jump that you can see and hear, must mean they would loose a step or more.  The timing of the glitch is not constant but approx' every second or so.
I have tried diferent velosities and excel' b cant go too fast with no load as they give up.

Cheers John

18

General Mach Discussion / Re: Unstable stepper pulse

« on: November 29, 2009, 06:31:56 AM »

Fond the optimisation page.
It's odd that a search of the forum does not bring it up !
John

19

General Mach Discussion / Re: Unstable stepper pulse

« on: November 29, 2009, 04:35:31 AM »

Thanks for those replies
The driver test as I said says system excellent in all frequencies
I have tried the special driver, it will not work at all, even with a reboot

I have looked at the smooth step and it's a bit too expensive for now with shipping and tax to the UK

I will have a hunt for the optimisation document.

I don't quite understand why in another programme, EMC2 with a Linux boot on the same machine works smooth as silk.

Thanks John

20

General Mach Discussion / Unstable stepper pulse

« on: November 28, 2009, 12:25:43 PM »

Hi All
I hope someone can help with this problem, I am at my wits end with it.

I am bench testing my drives and motors.

When I run / Jog the motor it's as if there is a pulse or more missing. The motor has a sort of small hick-up, this must mean it would loose a step or more when on the machine.
I have tried the diagnostics which say timing / system excellent in all frequencies.
Different motor and drive combos all have the same problem.
I have tried the different settings in motor tuning and pulse timing to no effect.

I have tried running "EMC2" on a Linux boot up and everything appears perfect and smooth. So there shouldn't be any drive / motor issues.

Please Help
John