Re: [Emc-users] G540 Test Update

2012-04-16 Thread gene heskett
On Monday, April 16, 2012 05:11:33 AM Peter did opine: Hi Gene, You don't want to use an opto-isolation card with the G540 as it already is opto-isolated. Cheers, peter I may be missing something Peter, but the C1G delay is quite ignorable, 10ns, and its rail to rail 24 ma of drive

Re: [Emc-users] G540 Test Update

2012-04-16 Thread gene heskett
On Monday, April 16, 2012 05:18:47 AM Gary P. Fiber did opine: I need to find the start of this thread. i am running a G540, an Intel M525MW board Other than both of mine are D525MW's with Probotix steppers motors and all 3 axes move fine. I just need to calibrate them for proper distance

Re: [Emc-users] G540 Test Update

2012-04-16 Thread gene heskett
On Monday, April 16, 2012 06:01:27 AM Kirk Wallace did opine: I tried a 75AC541 buffer on the SIIG card: http://wallacecompany.com/machine_shop/G540/g540_siig_buf.jpg and then tried it unbuffered at 1kHz: http://wallacecompany.com/machine_shop/G540/g540_siig_1kHz.jpg I got a green LED on

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Mark Wendt
On 04/15/2012 07:09 PM, Kirk Wallace wrote: I have some scope traces from LinuxCNC's pump below. I haven't had time to add text to the pictures yet but I'll try to describe them in this message for now. The group of pictures is here: http://wallacecompany.com/machine_shop/G540/

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Peter Homann
An BoB without opto-isolation will give you the same 24mA rail to rail output. I just didn't see a need to pay for something that's not needed. But then, it's your choice. :) Cheers, Peter On 16/04/2012 7:17 PM, gene heskett wrote: On Monday, April 16, 2012 05:11:33 AM Peter did opine: Hi

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Ron Ginger
On 4/16/2012 12:04 AM, emc-users-requ...@lists.sourceforge.net wrote: My favorite fix so far is to recomend a buffer board on the parallel port. It's the only thing a user could add that would cover most every parallel port and the G540. A user would have a harder time fixing the G540 or the

Re: [Emc-users] G540 Test Update

2012-04-16 Thread gene heskett
On Monday, April 16, 2012 10:23:30 AM Peter Homann did opine: An BoB without opto-isolation will give you the same 24mA rail to rail output. You should refer to it by the URL, is this it? http://www.homanndesigns.com/store/index.php?main_page=product_infocPath=22products_id=59 That is not

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Peter Homann
Hi Gene, I wasn't pushing you to buy my breakout board. I'd assume you would have bought a C10 from CNC4PC. It's a plain signal buffered board. Not as good as mine of course. :) As to the DC-03, I had a bit of a rush last week, so am putting another run through the pick and place machine this

Re: [Emc-users] G540 Test Update

2012-04-16 Thread gene heskett
On Monday, April 16, 2012 11:52:54 AM Peter Homann did opine: Hi Gene, I wasn't pushing you to buy my breakout board. I'd assume you would have bought a C10 from CNC4PC. It's a plain signal buffered board. Not as good as mine of course. :) Naturally. ;-) As to the DC-03, I had a bit of

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Kirk Wallace
On Tue, 2012-04-17 at 01:41 +1000, Peter Homann wrote: Hi Gene, I wasn't pushing you to buy my breakout board. I'd assume you would have bought a C10 from CNC4PC. It's a plain signal buffered board. Not as good as mine of course. :) I'm thinking the C26:

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Dave
Peter, How do the Chinese get stuff into the US so efficiently? If you look at Ebay they are selling things in the US for less than $10 and offering free delivery! I ordered some cables once - about $100 worth - and the guy shipped them express mail from China for about $20. This was probably

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Dave
On 4/16/2012 12:21 PM, Kirk Wallace wrote: On Tue, 2012-04-17 at 01:41 +1000, Peter Homann wrote: Hi Gene, I wasn't pushing you to buy my breakout board. I'd assume you would have bought a C10 from CNC4PC. It's a plain signal buffered board. Not as good as mine of course. :) I'm

Re: [Emc-users] G540 Test Update

2012-04-16 Thread andy pugh
On 16 April 2012 17:58, Dave e...@dc9.tzo.com wrote: Perhaps Marris should consider adding this to the G540 and doing a USB port power steal to drive the electronics? Why not use some of the stepper motor power supply? (probably isolated and re-referenced to p-port GND using a DC/DC converter)

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Dave
On 4/16/2012 1:05 PM, andy pugh wrote: On 16 April 2012 17:58, Davee...@dc9.tzo.com wrote: Perhaps Marris should consider adding this to the G540 and doing a USB port power steal to drive the electronics? Why not use some of the stepper motor power supply? (probably isolated and

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Jon Elson
gene heskett wrote: On Monday, April 16, 2012 12:05:22 AM Jon Elson did opine: It was described earlier that the charge pump input to the G540 is capacitively coupled, and apparently has a large coupling cap. If it is driving the base of a BJT with the cap, that would require a pretty

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Dave
On 4/16/2012 1:30 PM, Stephen Dubovsky wrote: Expense.A USB cable is cheap and that eliminates the DC-DC converter cost since the power is coming from the proper side of the optos. But w/ cheap comes low reliability? The USB can be power up/down by the host. A USB fault will

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Kirk Wallace
On Mon, 2012-04-16 at 12:16 -0500, Jon Elson wrote: ... snip But, I was thinking of a generic PNP or NPN transistor, but the person who described the circuit a few days ago did not say whether it was junction transistor or a FET. Jon Most of the components on the G540 are SMT and too small

Re: [Emc-users] G540 Test Update

2012-04-16 Thread andy pugh
On 16 April 2012 19:43, Kirk Wallace kwall...@wallacecompany.com wrote: I'm still concerned that the G540's 10x microstepping would put it out of the parallel port arena. It seems a 5i25 would be more appropriate, plus taking into account other savings the 5i25 might provide, might make it

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Kirk Wallace
I got a close up of the pump input area and marked up what I think is on the board: http://wallacecompany.com/machine_shop/G540/G540_upper_bottom_z-1b.png So, I think C is the capacitor coupler. Then the signal drives one SMT diode and across another (filter?) capacitor and the opto-c LED with

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Peter Homann
Oh, I don't think it is that cheap, just the west is so expensive. UPS want $70+ to ship 500g by air. I get charged US$80.00 for 0.4m3 @ 350kgs shipped by sea from China. So that's $200.00 per cubic metre. A 40ft container has a volume of 67.7 m3. So that's $13,540.00 for shipping a

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Peter Homann
On 17/04/2012 2:17 AM, gene wrote: Probably the DC05 combo, as it will be driving the board in a 7x12. Basically, the DC-05 is a DC-03 but without the microprocessor. The microprocessor' main job is to convert a low frequency PWM to a higher one to cross the opto-isolator. It means that

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Dave
On 4/16/2012 7:17 PM, Peter Homann wrote: just the west is so expensive That is what I suspected. I was working with a company in the US that made Casket/Coffin hardware. A strange business, but they were successful for 30+ years. They were located about 50 miles from a harbor in Chicago.

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Jon Elson
Kirk Wallace wrote: Most of the components on the G540 are SMT and too small to have markings, so I could only guess about what they are. I have some close up pictures of the area in question, but my camera's cable has woken up and run off somewhere. I'll post the pictures when I get this

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Dave
On 4/16/2012 9:28 PM, Jon Elson wrote: Kirk Wallace wrote: Most of the components on the G540 are SMT and too small to have markings, so I could only guess about what they are. I have some close up pictures of the area in question, but my camera's cable has woken up and run off

Re: [Emc-users] G540 Test Update

2012-04-16 Thread gene heskett
On Monday, April 16, 2012 09:22:01 PM Jon Elson did opine: gene heskett wrote: On Monday, April 16, 2012 12:05:22 AM Jon Elson did opine: It was described earlier that the charge pump input to the G540 is capacitively coupled, and apparently has a large coupling cap. If it is driving

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Ron Ginger
On 4/16/2012 8:54 PM, emc-users-requ...@lists.sourceforge.net wrote: That is what I suspected. I was working with a company in the US that made Casket/Coffin hardware. A strange business, but they were successful for 30+ years. They were located about 50 miles from a harbor in Chicago.

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Peter
Yep,  $80.00 to get it to Australia from China. About $300 to get it off the ship to the depot. And about $250  to get it delivered 10Km away. And they still can't work out why the West is uncompetitive. Needless to say, I  usually pick it up from the depot myself.   Cheers,   Peter.

Re: [Emc-users] G540 Test Update

2012-04-16 Thread Jon Elson
Dave wrote: True, but even little Nema 23 steppers have little usable torque beyond 800 rpm unless you go with a high voltage stepper drive (which the G540 is not). Larger Nema 34 steppers are pretty useless beyond 600 rpm or so. I used to demo my mini-mill with Gecko 201A drivers and

Re: [Emc-users] G540 Test Update

2012-04-15 Thread Peter C. Wallace
On Sat, 14 Apr 2012, Kirk Wallace wrote: Date: Sat, 14 Apr 2012 14:45:40 -0700 From: Kirk Wallace kwall...@wallacecompany.com Reply-To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net To: LinuxCNC Users List emc-users@lists.sourceforge.net Subject: [Emc-users] G540

Re: [Emc-users] G540 Test Update

2012-04-15 Thread Dave
@lists.sourceforge.net Subject: [Emc-users] G540 Test Update I set up Dan's G540 today and used it with three different ports. A motherboard port which worked okay, but showed a bit of a saw toothed wave form, so it seems the G540 pump input draws a fair amount of capacitive load compared

Re: [Emc-users] G540 Test Update

2012-04-15 Thread Jon Elson
andy pugh wrote: On 14 April 2012 22:45, Kirk Wallace kwall...@wallacecompany.com wrote: A 660 Ohm resistor pulled the ramp up higher, but 5V / 660 Ohms = 7.5 mA and is starting to get into an amp range that could get interesting for pin 16. I thought that nearly all p-ports can

Re: [Emc-users] G540 Test Update

2012-04-15 Thread Kirk Wallace
I have some scope traces from LinuxCNC's pump below. I haven't had time to add text to the pictures yet but I'll try to describe them in this message for now. The group of pictures is here: http://wallacecompany.com/machine_shop/G540/ Motherboard port, set to SPP in BIOS:

Re: [Emc-users] G540 Test Update

2012-04-15 Thread gene heskett
On Sunday, April 15, 2012 09:24:08 PM Kirk Wallace did opine: I have some scope traces from LinuxCNC's pump below. I haven't had time to add text to the pictures yet but I'll try to describe them in this message for now. The group of pictures is here:

Re: [Emc-users] G540 Test Update

2012-04-15 Thread Steve Stallings
- From: Kirk Wallace [mailto:kwall...@wallacecompany.com] Sent: Sunday, April 15, 2012 6:09 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] G540 Test Update I have some scope traces from LinuxCNC's pump below. I haven't had time to add text to the pictures yet but I'll try

Re: [Emc-users] G540 Test Update

2012-04-15 Thread Steve Stallings
Wallace [mailto:kwall...@wallacecompany.com] Sent: Sunday, April 15, 2012 6:09 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] G540 Test Update I have some scope traces from LinuxCNC's pump below. I haven't had time to add text to the pictures yet but I'll try to describe

Re: [Emc-users] G540 Test Update

2012-04-15 Thread Kirk Wallace
On Sun, 2012-04-15 at 22:05 -0500, Steve Stallings wrote: Kirk, Oops, I now realize that you did get different result for the Startech card in EPP mode. Did you have a utility from Startech to set that board to EPP mode, or did you use one of the utilities from Jon Elson or a similar

Re: [Emc-users] G540 Test Update

2012-04-15 Thread Kirk Wallace
On Sun, 2012-04-15 at 21:37 -0400, gene heskett wrote: ... snip What happens if the pump frequency is reduced to say 10% of what its set at now? I haven't tried that. If I disconnect the G540 so there is no load on the parallel port pin, the charge pump is a clean square wave. I used 10x on

Re: [Emc-users] G540 Test Update

2012-04-15 Thread Jon Elson
gene heskett wrote: Looking at the scope traces, either the probe is way out of calibration against the scopes own test square wave, or the 540 has a low value series resistor, 33-120 ohm range, with several hundred pf on the other side of the resistor as a noise filter on that input, and

Re: [Emc-users] G540 Test Update

2012-04-15 Thread gene heskett
On Sunday, April 15, 2012 11:55:24 PM Kirk Wallace did opine: On Sun, 2012-04-15 at 21:37 -0400, gene heskett wrote: ... snip What happens if the pump frequency is reduced to say 10% of what its set at now? I haven't tried that. If I disconnect the G540 so there is no load on the

Re: [Emc-users] G540 Test Update

2012-04-15 Thread gene heskett
On Monday, April 16, 2012 12:05:22 AM Jon Elson did opine: gene heskett wrote: Looking at the scope traces, either the probe is way out of calibration against the scopes own test square wave, or the 540 has a low value series resistor, 33-120 ohm range, with several hundred pf on the

Re: [Emc-users] G540 Test Update

2012-04-15 Thread Peter
Hi Gene, You don't want to use an opto-isolation card with the G540 as it already is opto-isolated. Cheers,   peter   --- Peter Homann http://www.homanndesigns.com/store On Mon 16/04/12 2:04 PM , gene heskett wrote:On Sunday, April 15, 2012 11:55:24 PM Kirk

Re: [Emc-users] G540 Test Update

2012-04-15 Thread Gary P. Fiber
I need to find the start of this thread. i am running a G540, an Intel M525MW board with Probotix steppers motors and all 3 axes move fine. I just need to calibrate them for proper distance and get the homing Hall effect sensors connected.I am not running the charge pump enabled in the G540.

Re: [Emc-users] G540 Test Update

2012-04-15 Thread Peter
  Pretty sure that the SOT 3 device will be a reverse voltage protection diode for the opto LED diode. pf caps are not  usually termed big ones. I would ecpect that the charge pump circuitry is on the other side of the opto.   Cheers,   Peter. --- Peter Homann

Re: [Emc-users] G540 Test Update

2012-04-15 Thread Dave
For whatever reason, the G540 charge pump input works fine with the Intel D525MW board and LinuxCNC. Whether or not you use it is really up to you. The Intel D525MW board may be the cheap fix to the G540 charge pump compatibility issue. :-/ Dave On 4/16/2012 12:23 AM, Gary P. Fiber wrote:

Re: [Emc-users] G540 Test Update

2012-04-15 Thread Kirk Wallace
I tried a 75AC541 buffer on the SIIG card: http://wallacecompany.com/machine_shop/G540/g540_siig_buf.jpg and then tried it unbuffered at 1kHz: http://wallacecompany.com/machine_shop/G540/g540_siig_1kHz.jpg I got a green LED on both. The SIIG worked at 5kHz unbuffered too, but peaked 1 Volt

Re: [Emc-users] G540 Test Update

2012-04-15 Thread Kirk Wallace
On Sun, 2012-04-15 at 21:23 -0700, Gary P. Fiber wrote: I need to find the start of this thread. i am running a G540, an Intel M525MW board with Probotix steppers motors and all 3 axes move fine. I just need to calibrate them for proper distance and get the homing Hall effect sensors

[Emc-users] G540 Test Update

2012-04-14 Thread Kirk Wallace
I set up Dan's G540 today and used it with three different ports. A motherboard port which worked okay, but showed a bit of a saw toothed wave form, so it seems the G540 pump input draws a fair amount of capacitive load compared to the pin 16 output source capability. I then used a Rosewill dual