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Re: Mach 1 Computer was: Capacitors for Geckos when using fuses
Jim:
Well, let's see if I can be any help here.... One thing about TurboCNC is that it needs to run in real-mode. If you have memory managers running (like EMM386) or the like then there'll be a negative performance impact. Command prompt safe mode from Win98 should be about where you want to be environment-wise. Next rev I'm putting a bit more detail on the startup screen about this so there should be no surprises. The Start, Max, and Accel parameters set up the trapezoid velocity envelope for a move. Good practice is to start with very conservative (low) values and work up, increasing acceleration last. Say 100 Hz to start, 1000Hz max, and 500 accel. Since Turbo is 486 optimized and runs in textmode DOS, I'd say your 1.4 Gig AMD system is probably better suited to Art's program. These new processors have some slick opcodes like conditional moves and SIMD that can really crunch numbers - when the software takes advantage of them. Anyway, to measure speeds, run successively higher feedrates until your sense of danger tells you to stop. G01 X10 F5 G01 X0 F10 G01 X10 F15 ... Welcome to CNC machining, by the way. This is a fascinating hobby. Dave Kowalczyk Everett WA --- In CAD_CAM_EDM_DRO@y..., "jagco1998" <jagco1998@y...> wrote: Well, to begin with, I am using a PC that I built.dual boot.2- 3 times faster than Turbocnc. But Im not really sure as I am new tothe reason why Mach1 seems to perform smoother.be happy to post the results. |
Re: DRO / linear scales vs. wire driven rotary
Doug Harrison
or the Camtronics board using wire to rotary encoder arrangement and whatHaven't built one but I've seen Bubba's. (We is sorta nayburs here on the backwaters of the Chatahoochee, known locally as the Atlanta sewer system.) It works very well and I would not hesitate to recommend the concept. I don't recall that the Lindsey software even required a board, just a parallel port. Art's wire driven encoders work surprisingly well. Chris Bruno had some encoders for sale that should work. Doug |
Re: Mach 1 Computer was: Capacitors for Geckos when using fuses
jagco1998
Well, to begin with, I am using a PC that I built.
The components are probably above what most people would use for a hobby CNC controller.But since my Intel system crapped out on me, this is the only setup Ive got to use for now. Im using an AMD XP 1600+(1400Mhz),Asus A7V266-E motherboard w/512mb DDR mem,a Geforce4Ti4200 video card, running under XP pro/Win98 dual boot. Mach1 seems about (Im guessing by the looks of travel speed by eye)2- 3 times faster than Turbocnc. But Im not really sure as I am new to this CNC stuff, and dont know how to determine the actual speeds of travel.Hell< I cant even setup Turbocnc right, as thats probably the reason why Mach1 seems to perform smoother. As far as Mach1 setup goes..I left everything at defaults after installing, with exception to the motor tuning, and of coarse, the pin config for my breakout board. I adjusted the motor setting because the motors were "slipping" and jumping erratically during revs, when turning(I dont know the word for this.) If you could help me in testing the speeds of travel, then I will be happy to post the results. Regards, Jim --- In CAD_CAM_EDM_DRO@y..., wanliker@a... wrote: Can you tell us just what you used for the computer for Mach 1,motherboard, processor, speed, and video board? This might help othersincluding me, that are looking at that program. what speeds are you obtaining on theCNC? Also more details on any problems with Mach 1 setup, and moreabout your machine, a nice long report would be good......grin. I love happy |
Re: using servo motors w/encoders for my DRO??
mueller914 wrote:
With my servo controller turned off, is it feasible to use the encoders off my servo motors for a DRO?Sure. If the Camtronics kit wouldn't work, could I just use the software from lindsayengraving.com?I can't say if any particular program (other than EMC) will do for a DRO. Jon |
Re: DRO / linear scales vs. wire driven rotary
Ken Jenkins
I have the DRO board kit from Camtronics as well and was planning to go the
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rotary encoder route described by Bubba. Then I talked to the engineers at U.S. Digital a while ago and they were talking about making a head and a linear scale at 500 lpi. The higest res they carry now is 360 which is 1440 in quad = res of .00064" which I didn't think was good enough. The 500 would be 2000 in quad = res of .0005 which I did think would be good enough (has anyone used the 360 strips?). So I thought I'd wait and see if they'd offer it. I thought the linear strip solution would be a cleaner mount and setup than having to cope with the wire arrangement. I guess the problem for the higher res strips the first time around was there were some issues with part yields. I contacted them recently and was told essentially, "the higher res linear strip was a project on hold for the moment". So I'm back to looking at the rotary encoder driven by the wire arrangement which Bubba describes. Bubba does an excellent job on his web site of supplying information about the blocks, mounting arrangement, and software (thanks! .... although the .pdf drawing of the blocks is unreadable at least here and the pictures are a little too small to really see anything useful ... not to sound ungrateful mind you :-). Unfortunately the encoders he describes using are one of those "you should have been here yesterday deals when they were giving them away deals". Has anyone here built a DRO using Bubba's board design, the Lindsey board or the Camtronics board using wire to rotary encoder arrangement and what encoders did you use? Ken Jenkins kjenkins@... Message: 10 |
Re: Atlanta source of L298s?
BG Micro (www.bgmicro.com) has them for $3.50 each.
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My order was delivered within a week. --- In CAD_CAM_EDM_DRO@y..., RichD <cmsteam@s...> wrote:
I am in Atlanta. Not much to offer in these parts. |
Re: Capacitors for Geckos when using fuses
Jim Brown
Yeah! I got it all hooked up and my mill is now under cnc!
I just wish that I knew how to setup Turbocnc correctly. I tested with Mach1 and these puppies scream. But under Turbocnc, they seem to miss alot of steps. Mach1 was easy for someone like me, who has no prior experience with CNC, to setup and tune the motors, but I cant figure out how to setup Turbocnc right. Regards, Jim turbulatordude <davemucha@...> wrote:I agree with you on this. for less than $1.00 per cap, you enjoy increased protection for the $$$ Gecko. I too do this regardless of how close to the power supply the Gecko's will be. Dave --- In CAD_CAM_EDM_DRO@y..., Jim Brown wrote:
Addresses: FAQ: FILES: Post Messages: CAD_CAM_EDM_DRO@... Subscribe: CAD_CAM_EDM_DRO-subscribe@... Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@... List owner: CAD_CAM_EDM_DRO-owner@..., wanliker@... Moderator: jmelson@... timg@... [Moderator] URL to this group: OFF Topic POSTS: General Machining If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble. I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list. NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill List Mom List Owner Your use of Yahoo! Groups is subject to --------------------------------- Do you Yahoo!? Y! Web Hosting - Let the expert host your web site |
Re: Has anyone built an SPC display for Digimatic scales?
The import ones.
--- In CAD_CAM_EDM_DRO@y..., Chris Baugher <cbaugher_yahoo@b...> wrote: remote display. I haven't found much yet. Does anyone have pictures, |
Re: Capacitors for Geckos when using fuses
turbulatordude
I agree with you on this. for less than $1.00 per cap, you enjoy
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increased protection for the $$$ Gecko. I too do this regardless of how close to the power supply the Gecko's will be. Dave --- In CAD_CAM_EDM_DRO@y..., Jim Brown <jagco1998@y...> wrote:
|
Vexta 5-phase stepper wiring
Zafar Salam
Hi all,
Can somebody guide me on which wires to connect for the 5-phase Vexta PH599H-A stepper and the Super Vexta UDX5128 driver. The motor has 10 wires and the driver has 5 terminals marked Blue, Red, While, Brown, Black. Can't find the manual for this controller too. Regards, Zafar |
Mach 1 Computer was: Capacitors for Geckos when using fuses
Can you tell us just what you used for the computer for Mach 1, motherboard,
processor, speed, and video board? This might help others including me, that are looking at that program. what speeds are you obtaining on the CNC? Also more details on any problems with Mach 1 setup, and more about your machine, a nice long report would be good......grin. I love happy endings........ bill |
Re: Capacitors for Geckos when using fuses
Jim Brown
That I dont know, as all of this is very new to me.
But I'm going to use the 470uF caps anyway as per Mariss' suggestion. After all, he would know better than anyone else, considering the Gecko's are his creation. I cant see how it would hurt. Thanks for the help. Regards, Jim turbulatordude <davemucha@...> wrote:Hi Jim, I think you are correct regarding the switching powers supply. the calculation does reveal an interesting phenonimon. (sp?) with the current remaing constant at 9 A, a 24 V power supply (home built) requires 20,000uF cap a 48 V power supply (home built) a 10,000uF cap. the higher the voltage the lower the cap, but in the case of a switcher, I think you are correct that it's primary function is handling ripple. The question I would pose then is if one had the switcher remote, and the 4,700uF (your app) cap next to the Gecko, would one still benefit by the 470uF at the Gecko itself ? I think not. Dave --- In CAD_CAM_EDM_DRO@y..., Jim Brown wrote: regulated or a switching power supply is used then a large capacitor should be placed across the output terminals. A 2000uF-10000uF capacitor should do." That is why I chose a 4700uF cap. for the power supply outputterminals... It's about right in the middle of Mariss' suggestion of a capacitor for a switching power supply. He wasnt specific as to what voltage rating for this cap, he wasonly specific as to what uF value (2,000-10,000uF) Your formula for computing the value of a capacitor, I think, isfor when building your own power supply, in conjunction with a bridge rectifier and transformer. I dont think this applies to when you are using a regulated orswitching power supply. The cap mentioned above, is placed on the output terminals to insure that the ripple current stays within the demand of the drivers current requirements. That is what I get from the papers. I may be wrong about this though. place ANYTHING between the main cap and the gecko OR if the lines arelonger than the listed 18 inches.the switching of the gecko will encounter voltage spikes from thestepper. the on-board cap on the gecko can handle some of this while themain cap handles the rest.operate fine with a 35V cap.fine, but the cap size needs to be suffiecnt for the amp load of thesystem. to total all motors for the main cap sizing.gecko meG201's, and have already placed a 4700uF 35V cap across the PS themthat the power only fluctuates from 24V to 24.2V no load. aol://5863:126/rec.crafts.metalworking or go thru Google.com to reachif not protected with a fuse? Would it be wise to also fuse the it if you have trouble. a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list. THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill
Addresses: FAQ: FILES: Post Messages: CAD_CAM_EDM_DRO@... Subscribe: CAD_CAM_EDM_DRO-subscribe@... Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@... List owner: CAD_CAM_EDM_DRO-owner@..., wanliker@... Moderator: jmelson@... timg@... [Moderator] URL to this group: OFF Topic POSTS: General Machining If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble. I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list. NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill List Mom List Owner Your use of Yahoo! Groups is subject to --------------------------------- Do you Yahoo!? Y! Web Hosting - Let the expert host your web site |
Re: CNC'd drafting machine?
Mike Snodgrass
How bout that! I have two of the units you are talking about, one vemco and
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one k&e, both are 6ft long. I had pondered the same thing, they would be very easy to make atachments for. The problem was how to drive them. I finally decided to try 1/16" aircraft cable and steppers. I don't know how much stretch to anticipate out of 12' of cable, we'll see how it works. ----- Original Message -----
From: "Carlos Guillermo" <carlos@...> To: "CAD_CAM_EDM_DRO@egroups. Com" <CAD_CAM_EDM_DRO@...> Sent: Friday, October 25, 2002 11:17 AM Subject: [CAD_CAM_EDM_DRO] CNC'd drafting machine? Hi All -aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble. sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill |
Predicting motor performance
I have lots of motor spec sheets without speed / torque curves. In most
cases there are several versions of the same static torque design, where they trade off current for inductance. I realize that higher inductance is going to cut into the speed / torque curve at the high end, but I don't know how much. Does anybody have any equations or predictions for this? Would a straight linear model work? What I'm thinking of is looking at what the RMS current of a square wave at the bus voltage would provide with the resistance and inductance of the motor in the given time for a single pulse. Is that an accurate model? Are there any simulation programs I can run which take motor and voltage parameters as inputs? Any help would be appreciated on this. G. Jackson |
Re: Has anyone built an SPC display for Digimatic scales?
Chris Baugher
When you say digimatic do you mean the Mitutoyo scales or the
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cheap imported ones? C| On Fri, 25 Oct 2002, emotorwerks wrote:
I am looking around for info related to SPC and how to build a remote |
Re: Yet Another CAM Option
--- In CAD_CAM_EDM_DRO@y..., Jim Brown <jagco1998@y...> wrote:
Anybody out there know how to write one for Surfcam?? Jim, What type of change are you looking for in your post? The file that generates the post in surfcam 2dfree is called postform. you will find it in the surfcam2dfree folder. This file uses variables to pass pertinante information for the posting operation. Some information like the starting code (safe block) and the ending code can be easily changed. Make sure you save a copy of this file before you make any changes! Matthew |
Re: CNC'd drafting machine?
Marv Frankel
Mike,
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If you put stiff enough tension springs somewhere in that cable, you don't have to worry much about stretch. You might want to go into a marine supply house, and ask for recommendations of cable. Marv Frankel Los Angeles ----- Original Message -----
From: "Mike Snodgrass" <snarf@...> To: <CAD_CAM_EDM_DRO@...> Sent: Friday, October 25, 2002 5:10 PM Subject: Re: [CAD_CAM_EDM_DRO] CNC'd drafting machine? How bout that! I have two of the units you are talking about, one vemcoand one k&e, both are 6ft long. I hadaircraft cable and steppers. I don't know how much stretch to anticipate out of12' of cable, we'll see how it works.if you have trouble.OTsister site to the CCED group, as many of the same members are there, for subjects, that are not allowed on the CCED list.DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble. sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill |
Re: Motor sizing - revisited
Marv Frankel
Alan,
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Thanks for the input. You're right about not worrying about backlash in the downfeed, but my fine feed seems to work O.K. in a down direction, but doesn't seem to want to retract correctly. I just thought of something stupid. I'm going to put my cordless drill on the fine feed shaft, and see if I can figure out what's wrong. I thought that motorizing the knee would present fewer problems, since there's about 400 lbs. of downward pressure on the screw, making for zero backlash. I'll keep you posted. Marv Frankel Los Angeles ----- Original Message -----
From: "Alan Matheson" <hokianga@...> To: <CAD_CAM_EDM_DRO@...> Sent: Friday, October 25, 2002 3:24 PM Subject: Re: [CAD_CAM_EDM_DRO] Motor sizing - revisited If youre only drilling holes through things does it matter if there is aworried. Maybe you could aim at converting both vertical axes in the longer term!if you have trouble.OTsister site to the CCED group, as many of the same members are there, for subjects, that are not allowed on the CCED list.DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble. sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill |
Re: Motor sizing - revisited
Alan Matheson
If youre only drilling holes through things does it matter if there is a
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little backlash. Its only if you need to go to a precise depth that you need to get worried. Maybe you could aim at converting both vertical axes in the longer term! Alan Matheson ----- Original Message -----
From: "Marv Frankel" <dcdziner@...> To: <CAD_CAM_EDM_DRO@...> Sent: Friday, October 25, 2002 10:56 PM Subject: [CAD_CAM_EDM_DRO] Motor sizing - revisited Guys,aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble. sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill |
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