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Re: AC drives
Raymond Heckert
I think they're referred to as 'written pole' motors.
You're virtually 'writing' every pole with a pulse of current. RayHex ---------- From: gittt2000 <gitlang@...>synchronous Servo motors and thought I'd sorted this out, but now I'mconfused again. are described as synchronous but they are not similar to ordinary acinduction motors. They have a wound stator, electronic commutation,and a rotor comprised of 6 (or another multiple of 3 presumably)permanent magnets, rather than the squirrel cage of conductorswhich form the normal induction motor rotor. As far as I can see thereis no induction involved - the stator produces a rotatingmagnetic field and the magnetic rotor follows it. What makes itsynchronous is the commutation which signals the servo drive to supply thecorrectly phased stator drive. |
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Re: vector's learning curve too big, any other suggestions
If ist is 2D and 21/2D try MillWrite 2000'
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Import drawings as HPGL or DXF, Carl --- In CAD_CAM_EDM_DRO@y..., "dhuffguitars" <dhuffguitars@m...> wrote:
I need to have a cad/cam program to load my drawings into to cut |
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Re: tkemc for win32 platform
Ray Henry
Erie
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All of the source files are in the repository, Ray ? ?From: "Shelbyville Design & Signworks" <signworks@...> |
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vector's learning curve too big, any other suggestions
dhuffguitars
I need to have a cad/cam program to load my drawings into to cut
inlays for me. I am using Corel draw, but can't figure out how to make them work in Vector, I have the manual and I am lost. Is there any cad/cam program out there that is more artist friendly, instead of for the computer mind type? Bobcad? |
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Re: replacing feed screw with a hydraulic cylinder
b564htf
I've thought about hydraulic drive CNC for years. This may have
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already been discussed but my idea is to use a closed system with single shot pistons powered by solenoids or a motor driven cam. Each stroke of the piston would pump a metered amount of fluid from one side of the cylinder to the other kind of like a hydraulic jack. One stroke of the piston would equal a fixed amount cylinder travel. A bi- directional piston with check valves could be used to change the direction. Example: 1000 piston strokes could equal 1" of travel, kind of like a linear stepping motor. A stroke counter could keep track of the position. This system should work with stepper motor software. Some obvious negatives I can think of: Slow speed (?), piston seal leakage, temperature may change volume of fluid (?). Just thinking out loud but I'd like to hear what others think. --- In CAD_CAM_EDM_DRO@y..., "al5502" <telecomt@t...> wrote:
Did somebody try to get rid of the feed screw all together |
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Re: sherline table top machines
Yo Larry;
Sherlines, Taigs, Mini-Mills and the like are generally refered to as desktop machines. TV Tray more like, but the problem I'm seeing, is that I want to do stuff that's a little bigger than they can manage. Unfortunately, the only stuff up from that size, is a mill-drill, whose table and movement, take up almost as much space as a regular mill. They're nice teensy machines, but I'm left with putting together parts and pieces for something in between on an equally teensy budget. If you've got any projects bigger than a few inches on a side, your best bet would probably be cnc-ing a square column mill-drill like the Rong-Fu boring and Milling machine, or getting a used, bigger mill. Bill On Tue Nov 5 13:40:01 2002, larry, <lseguine@...> wrote: I am intrested in coments reguarding the sherline line of equipment.-- ---------------------------------------------------------------------------- RKBA! Blessings On Thee, Oh Israel! 4-19! ----------------+----------+--------------------------+--------------------- An _EFFECTIVE_ | Insured | All matter is vibration. | Let he who hath no weapon in every | by COLT; | -- Max Plank | weapon sell his hand = Freedom | DIAL | In the beginning was the | garment and buy a on every side! | 1911-A1. | word. -- The Bible | sword.--Jesus Christ ----------------+----------+--------------------------+--------------------- Constitutional Government is dead, LONG LIVE THE CONSTITUTION!!!!! ---------------------------------------------------------------------------- |
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Re: Inexpensive PCB engraver
turbulatordude
I put 'quickstep' and 'cnc' into google and got...
is this what you are looking for ? Dave --- In CAD_CAM_EDM_DRO@y..., "Aussiedude" <aussiedude@e...> wrote: I seem to remember some one was asking about an inexpensive PCBmachined. This may work, i have heard of them being used before.but I appreciated.can not get through on that address. You help would be reach it ifBob B.aol://5863:126/rec.crafts.metalworking or go thru Google.com to you have trouble.to be a sister site to the CCED group, as many of the same members arethere, for OT subjects, that are not allowed on the CCED list.POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........bill |
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Re: G-code interpreter/stepper controller
Art
Hi:
Take it from me, really, if theres one thing I KNOW its that 10,000 steps a second will never be overkill. 25000 seems acceptable to most, but to really please most, you'll need about 50,000. ( Took me a long time to get that one down... :) Art www.artofcnc.ca |
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Re: replacing feed screw with a hydraulic cylinder
In a message dated 11/5/2002 7:06:33 PM Central Standard Time,
toolingrus@... writes: Some obvious negatives I can think of: Slow speed (?), piston seal leakage,Key word here is "SOME..."! Just imagine how many negatives if you include the ones you CAN'T think of! Unless the hydraulic concept would provide a FORCE somehow unattainable elsewise, and you NEEDED that force, or the like, or, perhaps you live in a land where "cleaning goop off everything every hour or so is delightful", Steppers or Servo would be the way to go! |
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Re: tkemc for win32 platform
kdoney_63021
You can try
ftp://ftp.isd.mel.nist.gov/pub/emc/emcsoft/emc-1.1-17/ --- In CAD_CAM_EDM_DRO@y..., "Shelbyville Design & Signworks" <signworks@m...> wrote: after many trials and tribulations, I now have emc running somewhatreliably on my 8'x12' gantry router. On to phase 2, running emc remotely. Unfortunately, the NISTwebsite no longer has any of the EMC stuff on it. Did anyone download the TkEMC file for win32 from thewebsite?
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Re: tkemc for win32 platform
Les Watts
Great to hear you have the gantry machine working with EMC.
The software has high enough performance to work well with the high speeds and accelerations of large gantries. Right now I am not making much sawdust as I am in the middle of a commercial optical encoder design project. The prototypes will be cnc machined using EMC though! When that is done in a few weeks back to carved signs. People love 'em! I just run windows stuff in the office and linux in the shop. I have been using sneakernet (floppies) for g-code files but that is getting to be a chore... last sign job was about 6 megabytes of g-code. Burning cdrs is too slow.I need to install wired or wireless networking soon and I hope the rtlinux behaves when I plug that network card in. Les Leslie Watts L M Watts Furniture Tiger, Georgia USA engineering page: |
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Conversational CNC
Would someone on the list that has used AutoEdit CNC tell me if that is a
conversational CNC program. Or would someone care to download it and check it out with the same question. It has a series of windows that you fill in the parameters and it automatically writes the G code, also has simulate. This code then can be saved and I believe ran. Is this what conversational CNC is?????????? Or is it just a code editor??????? thanks, bill |
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Re: sherline table top machines
Larry,
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All my use is basically hobby oriented although I an now making some short run items for my own sideline business. I started with a Sherline lathe and mill years ago and used them as manual machines. Very handy and within their work envelope a very solid machine. I then converted the mill to CNC and the bug bit me. I sold the Sherlines to get a Shoptask for the larger capacity and it also became CNC. Decided I wanted a real mill and got Bridgett my Bport series II that was NC from the factory and came to me with a dead drives. I refurbished with EMC and Gecko G320s. Well, even with this heavy iron that I just love I really missed the little Sherlines. Saw an auction on e-bay for a Sherline mill and lathe where the seller was local and now I again have some Sherlines in my shop. Both have been converted to CNC. I should point out that I have recently become a Sherline dealer so I am now a little biased. I made the decision to become a dealer after I got the new setup. I have no experience with Taig mills but did have one of their lathes. Compared to the Sherline the Taig lathe is a toy. I have been told that the mill is much better. I do know that some people replace the Taig mill spindle motor with a Sherline spindle motor for the variable speed . Main thing on the Sherline equipment is to remember the capacity of the equipment and stick within those limits. If you do you will find that they are real tools and do some great work. Tim [Denver, CO] Sherline products at Deep Discount www.KTMarketing.com ----- Original Message -----
I am intrested in coments reguarding the sherline line of equipment.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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sherline table top machines
I am intrested in coments reguarding the sherline line of equipment.
I owned a jobshop machine shop 20 years ago. I had some pretty nice equipment at that time and learned to appreciate GOOD tools. I am now considering doing some work on small scale projects, and am in need of setting up a new shop. I have looked at the sherline line and to me it looks toy like. However looks can be very deciving. I would appreciate any coments reguarding that line, also i would like to know what other equipment is out there these days. I also was looking at a line called TAIG mills any thoughts on this equipment line ? i am absolutly intrested in setting things up with CNC operatons. The CNC was just a dream in the days of my shop way beyond anything that could have been afforded by a small shop. so this is going to be a new learning period for me, but i am determined to go this way Larry Seguine Alaska Tool And Die aka Far North Creations |
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Re: G-code interpreter/stepper controller
Luc Vercruysse
On most CNC machines there are 2 switches on each side of the axis. One is a
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limitswitch , the other one is a security switch. The limitswitch can be handled within software. Once a switch is hit, the motor decelerates and stops in a normal way (the same as you hit the stop button). The security switch disables all drivers and must be " hard wired ". very good specs. Is the system based on some microcontroller ? Is the interpreter running on the host computer ? Is software based on EMC ? Luc ----- Original Message -----
From: "bschwand" <bschwand@...> To: <CAD_CAM_EDM_DRO@...> Sent: Tuesday, November 05, 2002 8:30 PM Subject: [CAD_CAM_EDM_DRO] G-code interpreter/stepper controller Hi everybody,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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tkemc for win32 platform
Shelbyville Design & Signworks
after many trials and tribulations, I now have emc running somewhat reliably on my 8'x12' gantry router.
On to phase 2, running emc remotely. Unfortunately, the NIST website no longer has any of the EMC stuff on it. Did anyone download the TkEMC file for win32 from the website? Erie Patsellis Shelbyville Design & Signworks 1309 W. S. 7th Street Shelbyville, IL 62565 (217)774-4444 visit our website at www.shelbyvilledesign.com |
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Re: replacing feed screw with a hydraulic cylinder
alex
Just want to address a cost issue: small power pack from
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Princess - Auto -approx. $700 Canadian - $450 US. Alex ----- Original Message -----
From: Bill Vance <ccq@...> To: <CAD_CAM_EDM_DRO@...> Sent: Tuesday, November 05, 2002 2:49 PM Subject: Re: [CAD_CAM_EDM_DRO] replacing feed screw with a hydraulic cylinder On Tue Nov 5 09:53:55 2002, Jon Elson, <elson@...> wrote:andal5502 wrote:All too true, but here's a question:Did somebody try to get rid of the feed screw all togetherWe go through this every 6 months or so. It looks neat at first glance, ballscrew/acme thread/timing chain onto a hydraulic motor, and as a way toissues? looks do-able, at least at first glance.-- RKBA! Blessings On Thee, Oh Israel!4-19! ----------------+----------+--------------------------+--------------------- An _EFFECTIVE_ | Insured | All matter is vibration. | Let he who hath noChrist ----------------+----------+--------------------------+--------------------- -- 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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Re: replacing feed screw with a hydraulic cylinder
On Tue Nov 5 09:53:55 2002, Jon Elson, <elson@...> wrote:
al5502 wrote:All too true, but here's a question:Did somebody try to get rid of the feed screw all togetherWe go through this every 6 months or so. It looks neat at first glance, From the accuracy/resolution standpoint, what about slapping an encoder and ballscrew/acme thread/timing chain onto a hydraulic motor, and as a way to ditch some of the more complicated servo power supply/amplifier/control issues? looks do-able, at least at first glance. Bill -- ---------------------------------------------------------------------------- RKBA! Blessings On Thee, Oh Israel! 4-19! ----------------+----------+--------------------------+--------------------- An _EFFECTIVE_ | Insured | All matter is vibration. | Let he who hath no weapon in every | by COLT; | -- Max Plank | weapon sell his hand = Freedom | DIAL | In the beginning was the | garment and buy a on every side! | 1911-A1. | word. -- The Bible | sword.--Jesus Christ ----------------+----------+--------------------------+--------------------- Constitutional Government is dead, LONG LIVE THE CONSTITUTION!!!!! ---------------------------------------------------------------------------- |
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