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Re: WOW!! new EMC Build
William Scalione
Tim Goldstein wrote:
Ok, downloaded the new version of emc, I was running november something, saved my ini file as .old, performed clean and erased the damn thing. Oh well, got most of it restored and started using the frequency mode for steppers. What a difference. Where I was running reliably at 40 IPM is now about 120 IPM using Dan Mauch's controller. I was going to try to find new stepper drives, but don't really need to anymore. Thanks to the EMC folks for that. Question 1) I don't see the MAX_VELOCITY settings in the INI file under each axis. Is it something I need to add? Question 2) Is there a setting in the INI file for direction? Everything is now backwards. Question 3) I am running a P166 with 32 meg ram. Is anyone running steppers with this config or less? It is somewhat sluggish when emc is running, ie. the mouse is jerky and windows seem to take a few seconds to pop up. This is not something new with this version as the november version did the same. Thanks in advance and a big thanks to the NIST people. Bill scalione@... |
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Re: Phase converter
Darrell
I have no problem reversing my lathe at any speed. I had to power up
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everything in the shop to trip the breaker. It's only a 30 amp breaker. Darrell ----- Original Message -----
From: Steve Carlisle <quatsein@...> To: <CAD_CAM_EDM_DRO@...> Sent: Friday, February 25, 2000 6:23 PM Subject: Re: [CAD_CAM_EDM_DRO] Phase converter From: "Steve Carlisle" <quatsein@...>my phase converter is off of a 30 amp breaker under that.hp YAM 14 inch lathe. So far so good, I have 11 hp of machine and 5 hp ofthe lathe with out first stopping it. That is what it took to pop the 30 ampdiscussion of shop built systems in the above catagories. To Unsubscribe, read archives, change to or from digest. |
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Re: need help finding web page
Steve Carlisle
You may try here,
Steve ---------- From: Clint Bach <clintbach@...> To: CAD_CAM_EDM_DRO@... Subject: [CAD_CAM_EDM_DRO] need help finding web page Date: Friday, February 25, 2000 11:04 AM From: Clint Bach <clintbach@...> Hi, I remember visiting a web page last fall which had a stepper driver circuit using the ??297, ??298 chip set. It looked good to me. I lost all my bookmarks and messages from that time so I can't find it now. It was from someone who joined this list about that time. Perhaps Hans W.???? Does anybody remember this? If so could you please send me the url? It wasn't dancam... Is there an archive for this list? If so where can I find it. Thanks, Clint Bach ------------------------------------------------------------------------ Show your style! Choose from 6 great card designs when you apply for Capital One's 9.9% Fixed APR Visa Platinum. ------------------------------------------------------------------------ Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the discussion of shop built systems in the above catagories. To Unsubscribe, read archives, change to or from digest. Go to: Log on, and you will go to Member Center, and you can make changes there. For the FAQ, go to bill, List Manager |
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Re: Phase converter
Steve Carlisle
For comparison, I have a 10hp idler, with the auto-start
feature, and it runs a 5hp lathe and a 5hp[ mill both at the same time. The real test for a convertor is the forward to reverse, but in the lathes highest speed, with no other machines running, as the running machines act as supplement power conditioning. My convertor is off a 60amp breaker, and draws about 1.5 amps at idle. Steve ---------- From: Darrell <dgehlsen@...> To: CAD_CAM_EDM_DRO@... Subject: [CAD_CAM_EDM_DRO] Phase converter Date: Friday, February 25, 2000 4:24 PM From: "Darrell" <dgehlsen@...> Well I just did a little experimenting with my phase converter. I have a 5 hp 3400 rpm idler motor with 100 mfd run capacitors and 100 mfd additional for starting. My shop is powered through a 90 amp breaker and my phase converter is off of a 30 amp breaker under that. I started my three Bridgeport mill spindles (three 2 hp motors) and my 5 hp YAM 14 inch lathe. So far so good, I have 11 hp of machine and 5 hp of converter running with no problem. Next I reversed the spindle motor on the lathe with out first stopping it. That is what it took to pop the 30 amp breaker on the phase converter. All of this without dimming the lights. I am using 8 gage wire from the breaker to the phase converter and 10 gage to each of the machines. It looks like all I need is a little bit bigger breaker on the phase converter. Darrell ------------------------------------------------------------------------ Start your own free email group on eGroups. ------------------------------------------------------------------------ Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the discussion of shop built systems in the above catagories. To Unsubscribe, read archives, change to or from digest. Go to: Log on, and you will go to Member Center, and you can make changes there. For the FAQ, go to bill, List Manager |
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Wonderboard PC interface original message!
Dean Sala
It seems as though this thread has went off on a tangent. I originally replied to Doug about a parrallel interface card that I had designed to work with CNCpro. But it seemed to never appear on the message board except in Doug's reply to it. The reply is in the "Interface Update" thread. Anyway, It seems as though some of you are getting confused between what Doug is proposing and what I have done. So I want to clarify. I designed an proto typed external interface card to work with CNCpro. I am building a homebrew CNC system so my design is catered towards that. I believe Doug has different requirements and is building a more robust board catered towards industrial use. Am I right? I'm not completely clear about his requirements yet. But this is what I wrote to him.
Here is my original message to the "Interface update" thread. ------------------------------------------------------------------------------------------------------------------------------ Doug, It's real great that you are trying to resolve this problem. I completely agree that we need some sort of breakout box that could get us up to speed faster. With an on board 5vPS, relays, screw in terminals and such. It just so happens that I have already designed a proto type of this board to work with CNCpro. Except that it does not use optoisolation on the board. I already have optoisolation on board my step drivers. The proto type plugs into the parrallel port via cable. It has it's own DB25 connector on one side and has a series of screw terminals on the other. It consists of a SN74S244 hex schmit trigger driver to drive the step and direction data (3 or 4 axis or whatever)into the Step motor drivers. The auxillary outputs, 3 in all so far (CNCPro at least) go through ULN2003a's (that can be parralleled for more current) to drive 1amp 5v relays. Also, the homing inputs are hooked up to IR switches with their own terminal block. The other inputs are just tied high through 4.7ks. I am still working on the design and am thinking about making it more universal for other parrallel port NC programs that aren't as configurable as CNCpro. But first I'm keeping it simple. I'm sorry for not getting ideas from you guys but now I have a feeling what you want. Are you sure you need optoisolation on the board too? I can add them right to the output of the SN74S244 but then the opto isolators would be driving opto isolators. Maybe I can put a switch selector to bypass opto isolation if the step drivers have them. Possible enhancements: On board 5V power supply(otherwise supply external 5v PS). Connectors to connect 120v to stepper power supply with fuses etc. Diagnostic LEDs connected to various outputs. Connectors for main power switch and power light. Oh, limit switch connectors tied to turn off stepper PS. There you have it! All-in-one wonder board! About using the parrallel port for drive LED's....you should sink them of course but it's always better to put a buffer inline like an S series TTL driver which can source 28ma and sink 64ma perfect for this situation, more noise resistant and just what their made for. This way you don't have to worry about how much power the parallel port can provide. Good luck Dean --------------------------------------------------------------------------------------------------------------------------------------- Please read Dougs reply in the "Interface Update" thread if you are interested in his comments. It is a message stored under his name If you have any questions about my design please reply. I left a few things out of the above description. Thanks Dean Sala |
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Re: DRO/cable source
A. G. Eckstein
At 10:04 AM 02/25/2000 -0700, you wrote:
From: "D.F.S." <dfs@...>aircraft I tried the several turns around the shaft, but found that I had to much ofcable as follows:This stuff sounds a bit stiff to me. an alignment problem to be satisfactory. Then I did it with just the 180 degree contact and have found it to be satisfactory. Even when the coolant gets into the block; there seems to be no slippage. By using the ball bearing setup, I can get more tension on the cable and minimize the slippage problem that the "plain" bearing encoders offered by at a lot higher price. Tuning cord, yes that crossed my mind; but as stated previously, had the cable and it works so why change? As far as the fishing line, would have gone that route if I did not have the cable. Art A. G. Eckstein axtein@... |
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Re: DRO
A. G. Eckstein
In the shop, I use a GOOD pair of dyke side cutters; but last night I just
had a pair of cheepies by my laptop and a pair of finger nail cutters! At 12:00 PM 02/25/2000 EST, you wrote: From: wanliker@...process. billA. G. Eckstein axtein@... |
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Stepster
Charles Gallo
Hi,
Well, I finally got around to doing some more work on Stepster. A new version has been posted that is based on Greg Nelson's version!(Thank you Greg). Give it a try. I've also posted some "Standard Coding Conventions" that will make life a lot easier for us if more than one of use is working on the code Charlie --> RKBA! PGP Fingerprint: 7218 67D7 54B8 EFAF 67B7 4FED 7AC5 3687 492C 7382 PGP Key at |
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Re: thinking about a sherline conversion
<A href=">eB
ay item 268493142 (Ends Feb-28-00 19:59:53 PST) - Stepper Motor Driver + 2 motors 4 robot / CNC</A> I am going to do a conversion on a sherline lathe and I am wondering if somebody from the list could tell me if this setup would work. I really dont want to learn another OS just to control the stepper motors.(linux, Keep hearing too many questions that I dont understand). Ahh for the good old days of cam controled single spindle screw machines. LOL I would appreciate any help figuring this out. Has any body done any work with the stepper control from herbach and rademan(?) . <A href=">Herbach and Rademan - Surplus Electro-mechanical & Scientific Equipment</A> . I have thought about buying one of thier controlers and seeing if i can figure out how to make it work. Thank You Gerald |
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Re: DRO
A. G. Eckstein
I believe this is what Steve Lindsey was using origionally??
I used the drafting cable as that is what I had laying around:0 Art At 08:38 AM 02/25/2000 -0500, you wrote: From: "Marshall Pharoah" <m_pharoah@...>might work. A. G. Eckstein axtein@... |
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Re: DRO/cable source
A. G. Eckstein
IMHO, the vynil would be better as I think it has a higher coefficient of
friction. Nylon has a very low one and makes excellent bearings. This can be especially important where we are dealing with small amounts of friction surface (180 degrees on a 5mm or smaller diameter). I don't have any tables in front of me at this time, but its a guess on my part. Art At 02:39 AM 02/25/2000 EST, you wrote: From: wanliker@...A. G. Eckstein axtein@... |
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Re: Dro
A. G. Eckstein
Bill,
Will do, however at this time; as this list does not accept attachments, there has been some off list discussions. Also, hope to have the web site done this weekend so all can pick and choose as they want! Art At 02:16 AM 02/25/2000 EST, you wrote: From: wanliker@...subject. Thanks,A. G. Eckstein axtein@... |
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Phase converter
Darrell
Well I just did a little experimenting with my phase converter.
I have a 5 hp 3400 rpm idler motor with 100 mfd run capacitors and 100 mfd additional for starting. My shop is powered through a 90 amp breaker and my phase converter is off of a 30 amp breaker under that. I started my three Bridgeport mill spindles (three 2 hp motors) and my 5 hp YAM 14 inch lathe. So far so good, I have 11 hp of machine and 5 hp of converter running with no problem. Next I reversed the spindle motor on the lathe with out first stopping it. That is what it took to pop the 30 amp breaker on the phase converter. All of this without dimming the lights. I am using 8 gage wire from the breaker to the phase converter and 10 gage to each of the machines. It looks like all I need is a little bit bigger breaker on the phase converter. Darrell |
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Re: Dro
A. G. Eckstein
At 12:31 AM 02/23/2000 -0000, you wrote:
From: "Terry May" <tmay@...>Thats the bearings! But as posted earlier, it appears they have no more. Also as I posted this week, the bearings in the motors have two different OD's so if you are planning on useing them for your encoders, you will have to have a stepped hole to accomodate the bearings or find another source suitable. However if you can get these bearings, they have a 5mm ID like the shaft of the motor. For new shafting, I ordered a 3' piece of 5mm from MSC after I had gotten a 7/32" piece! Need a 7/32" dia drill rod about 35" long:) It's theCorrect again, Red=+5V, Black=gnd, and the blue and yellow are the quadrature outputs. Don't worry if you hook them up backwards (yellow and blue that is) as the software can change direction if necessary (At least using Steve's program) Again I would appreciate any info you may be willing to share. IfAs far as going off list, I will be happy to correspond with you or others. I have shared with some, my "sketches" in Acad that I have for the building of the blocks and also for the changes that I have made to the electronics for this project. Hopefully, I can get some pictures made this weekend and will be posting to my web site as soon as I can get the pictures made and my web site re-generated. If all goes in accordance with the plan and the plan works, that should be by the end of the weekend and I will post the URL here for anybody that is interested. By the way if anyone else is interested Goldmine also has anotherThis is true, but to get finer resolution, you need either more lines, or a smaller shaft diameter. As related earlier, I am now looking at physical diameters of the shaft < 0.100 inches for a resolution of 0.0001 inches. So if you were to use the 400 line encoder, (without some form of multiplication of the signal), you would be looking at a diameter of 400/1000*0.100" or less than 0.04" in diameter and that would make a very weak shaft and also very subject to slipping. Personally, I wish the encoders had 2K lines!! ThanksOLDER THAN DIRT Country Bubba (Actually the inventor of Country and Bubba) |
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Re: DRO
A. G. Eckstein
0.035 just double checked!
Art At 01:22 AM 02/25/2000 EST, you wrote: From: ptengin@...Trying to A. G. Ecksteincut it is a bear so might be stainless steel!I believe that's called coated aircraft cable, availaable in most home axtein@... |
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Re: DRO
A. G. Eckstein
At 09:31 PM 02/24/2000 -0800, you wrote:
From: Joe Landau <jrlandau@...>I have two axles. One has the encoder wheel on one end, then a bearing, a space for the cable, then another bearing. The other axle has just a shaft with the space between the two bearings. No, the OD of the bearing does not matter and you will only have to change the dimensions of your blocks to accomodate them. Obviously, the ID needs to be the diameter of the shaft that you use. I chose to keep the shaft OD the same as the ID of the encoder wheel as it made things a lot easier to build and assemble. If this is the case I guess the dimensions are NOPE! Art OLDER THAN DIRT Country Bubba (Actually the inventor of Country and Bubba) |
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Re: DRO/cable source
Darrell
I guess that is why the big machines use either linear scales or belt drive
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them off the screw or direct drive them from the motor. Darrell ----- Original Message -----
From: Bertho Boman <boman@...> To: <CAD_CAM_EDM_DRO@...> Sent: Friday, February 25, 2000 11:05 AM Subject: Re: [CAD_CAM_EDM_DRO] RE: DRO/cable source From: Bertho Boman <boman@...>accuracy we should have a wire that has a known and uniform size. Since the plastic coating will compress around the shaft,it will look like a change in effective diameter. If that is exactly repeatable it would be OK.with temperature and for some materials it vary with the rate of change. We could get some interesting errors to hunt for if thecalibration factor varies with table speed. discussion of shop built systems in the above catagories. To Unsubscribe, read archives, change to or from digest. |
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Re: resonance and controllers
Darrell
Some software does not output the steps evenly spaced. Sometimes there is a
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very small pause between two pulses which will cause the motor to stall at certain speeds. Darrell ----- Original Message -----
From: Joe Vicars <jvicars@...> To: <CAD_CAM_EDM_DRO@...> Sent: Friday, February 25, 2000 10:59 AM Subject: [CAD_CAM_EDM_DRO] resonance and controllers From: Joe Vicars <jvicars@...>discussion of shop built systems in the above catagories. To Unsubscribe, read archives, change to or from digest. |
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free code
Ray Henry
There is an excellent article by Bill Roberts, "The foibles of free code"
in the Feb 2000 issue of Electronic Business. You can read it at It is the center article. Some concern was expressed recently that since EMC was distributed as public domain code that those of us who use it might suffer. Bill says, "First, let's clear up a common misconception. Open source is not the same as public domain code. When an author places his or her software in the public domain, he or she gives up all rights to dictate what can and cannot be done to it. Like public domain, open source code is free, but it comes with restrictions spelled out in the license." p57 Ray |
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