Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
- CAD-CAM-EDM-DRO
- Messages
Search
|
Re: PCL controllers available?????
stevenson_engineers
We use PLC's made by IMO.
Their smallest version The KLG 7 series is available as a starter kit with PLC, cable for PLC to PC and software for about 70 UKP [$100 ] The software is actually a free download from their web site. Go to click on freesoftawre and follow the KLG- WIN link. John S. --- In CAD_CAM_EDM_DRO@y..., wanliker@a... wrote:Programmable Logic Controllers, available with either free or very low costprogramming software?equipment in CNC operated equipment. |
|
Re: PCL controllers available?????
andyolney
Automation Direct has some $120 PLC's with $99 programing software.
Andy -- In CAD_CAM_EDM_DRO@y..., wanliker@a... wrote: Does anyone on the list have a source of low cost PLC'S,Programmable Logic Controllers, available with either free or very low costprogramming software?equipment in CNC operated equipment. |
|
Sherline Servo System for sale
andy_paul_2000
Sherline 4400 lathe and 2000 mill. Mill is outfitted with Flashcut 3
axis 5 amp CNC servo system. Much more accurate than stepper motors. Also Sherline CNC rotary table, PC, 21" inch monitor, and Bobcad/cam version 17 software. Many accessories also like Sherline tilting angle table, mill vise, steady rest, tool holders, chucks and collets, tooling plate, sherline live center, and more. All tools have been kept oiled and are in excellent if not like new condition. All bought new in late 2000 Email me at andy_paul_2000@... for more info. First $4000 takes it! Thanks Andy Paul |
|
Gecko servo tuning and variable encoder resolution / Mach1
vrsculptor
I was considering using a Gecko 310 with Mach1's step and direction
spindle drive with the existing servo amp to control my 4hp spindle for rigid taping and whatnot. I was also considering the ability to index my spindle rotation for 5-axis (don't ask). The applications require vastly different pulses per revolutions (cpr). USDIGITAL sells a EDIVIDE for $39 that lets you electronically divide encoder pulses by arbitrary factors which allows mutilpe resolutions from one encoder. My question (knew I would get there...) is a Gecko's tuning (gain and damping) dependent or independent of the encoders resolution? My suspicion is that it is depednet as gain is probably related to encoder resolution. Any opinion? Roger |
|
AC drives
Hi all,
Most of people use either steppingmotors or DC-servo, I noticed that the big manufactures (fadal, haas, dmg etc.) all use AC-servo. The benefits are more dynamic, more compact, higher peak torque. Are there any step and direction AC-drives out there, or is the price too high. AC-servo motors are synchroonmotors while a regular AC-motor (like the spindle motor) is asynchronic, right? Could it be possible to use a regular AC-motor as a drive motor, these motor are very cheap and deliver a lot of power. Just an idea, Hugo |
|
Maxnc 70 oz/in system under powered
rgcasteel
In searching for an e-mail address for Maxnc, I found this and other
Yahoo groups sharing their experiences. I own and have used the Maxnc 70 oz/in 3 axis motion control for some time. It is installed on a 16"x16"x6" router. I use DesignCad exporting DXF to Bobcad to create G codes. I'm quite pleased with work in both wood and sign vinyl cutting. I'm Ok with the Maxnc system my only wish is for more stepper power. Can my system be souped-up? More voltage? Larger steppers? I would appreciate your suggestions or instructions for this upgrade. |
|
Re: Gerber servo-control{specific} cards
You've got to be more specific. I think Gerber made their first Jonto be exact the controller is Model 3200, table is PCH 3274 I think the "PCH" is for poncing cutter head. Also was told Gerber is out of[at least this type of plotter] business ?? thanks Carl |
|
Re: EMC, Polar Coordinates CNC, ROBOT Arm Control?
I have been following this discussion with interest. Two years ago,
before I started working with my cnc mill, I purchased two robot arms with the notion of making a robotic machining workcell. EMC looked like an interesting tool to use to control both the mill and the robot loader. I now realize that this was not a practical project for me, but I still have the robot arms and I would like to control them somehow. So, without getting too far off-topic, I am curious to know if anyone in this group has implemented EMC with a robot arm (Polar Coordinates) and if they have any links to share on this subject. -Eric |
|
Re: Flashcut
caudlet
--- In CAD_CAM_EDM_DRO@y..., "Owen Lloyd" <sbw@c...> wrote:
Hey Tim. I am going to be retro'n my bench top unit. As you cantell by my misinformed posts, I'm still learning my way around. I have nopreference for windows based or DOS, I've used both over the years andwouldn't know which is best [if there is even a difference.]Owen: Both DOS and Windows have plus's and minuses. Here are some things to consider: DOS will run your machine with less computer horsepower and less initial expense. If all you ever want to do is load a file from floppy and make it cut, then DOS makes a good controller. Networking it to your Windows based CAD system is a challenge. Windows(98,2000,XP) is a bloated operating system but it offers several things. The graphical interface gets you away from special functions keys for every controller command. You can use longer file names for your cut files (like "HarleyMainCircleCut_1-16SlotMill.txt) instead of the limited 8 character DOS convention. You can get free windows based g-code simulators that will "cut" your files on the screen before putting bit to metal. You can have the CAD or CAM or both programs on the Windows Controller so making quick changes is a lot easier. Networking two or more Windows based computers is a 5 minute job. I urge you to take a look at Art's Mach1. The latest version is starting to look like a real professional and stable controller with some impressive features. The ability to make smooth cuts using the contour analysis has really improved my cuts. Being able to start or stop the g-code at any point and even edit the code in a window is a real time saver. True, you need to have at least a 500MHZ box, more RAM, and WIN2000 or XP, to get the most out of the software, but that grade of machine has become REAL cheap. |
|
Conversational CNC
When this list was first started there was quite a lot about Conversational
CNC, but nothing since, for a long time. Would someone undertake explaining to me and the list, what, and why Conversational CNC is desirable, its advantages and disadvantages. Also would any of the programmers on the list like to tackle a project like that? If so I would set up a group for you to handle the technical conversations. And I would be happy ti take care of any overhead for the list. Hopefully this would add another option to our members???????????? Thanks, bill List Mom |
|
Re: Flashcut
alex
There is a way to network Dos using Wattcp.
toggle quoted message
Show quoted text
Alex ----- Original Message -----
From: caudlet <tom@...> To: <CAD_CAM_EDM_DRO@...> Sent: Monday, November 04, 2002 2:15 PM Subject: [CAD_CAM_EDM_DRO] Re: Flashcut --- In CAD_CAM_EDM_DRO@y..., "Owen Lloyd" <sbw@c...> wrote:aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it ifHey Tim. I am going to be retro'n my bench top unit. As you cantell by mymisinformed posts, I'm still learning my way around. I have nopreferencefor windows based or DOS, I've used both over the years andwouldn't knowwhich is best [if there is even a difference.]Owen: Both DOS and Windows have plus's and minuses. Here are some 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: Polar Coordinates CNC?
Hi All,
Now as a real mind twist, try to imagine the "bridge" over the top of the rotating table as a semicircle. The only linear motion is the Z axis, mounted on that rainbow over the rotating table. I had some concept sketches done a few months ago, but ran into the problem of cutting a straight line with no kerf angle. Basically this is designed for contouring work with the center of the volume at the center of rotation, but has some limitations relative to lead angle of the tool vs. wall angle on the part. It would also require a long Z axis travel. My next version included a linear axis under the main rotary table, allowing straight line machining and vertical axis holes to be drilled anywhere on the table. So 2 rotary and 2 linear axis to handle 5 axis contouring. How can a control software accomodate this machine? Allan |
|
Re: Gerber servo-control cards
carlcnc wrote:
HI anyone know what cards Gerber used for their controllersYou've got to be more specific. I think Gerber made their first photoplotter in the early 1960's with a GE Mark Century control. Tape NC, about 500 paper-phenolic circuit boards and 2500 Germanium transistors. They have made photoplotters and routers ever since, through about 5 or 6 generations of CNC control. Jon |
|
Re: Stepper vs Servo ( was Re: Stepper motor speeds
Dave,
toggle quoted message
Show quoted text
Servos traditionally were harder to implement due to greater wiring complexity, add-in servo cards, limited software choices, many more tuning parameters, cost) when they were only the traditional servo amp with motion card. For the hobbyist it was pretty much EMC with a Servo to Go card. Great performance if you can pay the price and get over the learning curve. Now that Gecko has made the G320/340 series drives available servos have become about the same cost as steppers and only slightly harder to wire and tune. Pretty much you set them up just like you would a stepper as that is how the controller program sees them. So you can use any step and direction program you want, don't need a $800 motion card and only have to connect additional wires for the encoder to the drive. In my view it has opened a whole new level of performance for us hobby class people. Tim [Denver, CO] Sherline at Deep Discounts www.KTMarketing.com/Sherline ----- Original Message -----
Hi Tim, |
|
Re: Gerber servo-control cards
Shelbyville Design & Signworks
depends on which router, the early ones were stepper motor based
toggle quoted message
Show quoted text
Erie Patsellis Shelbyville Design & Signworks 1309 W. S. 7th Street Shelbyville, IL 62565 (217)774-4444 visit our website at www.shelbyvilledesign.com ----- Original Message -----
From: "carlcnc" <carlcnc@...> To: <CAD_CAM_EDM_DRO@...> Sent: Monday, November 04, 2002 10:02 AM Subject: [CAD_CAM_EDM_DRO] Gerber servo-control cards HIaol://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: Three phase 50 V. Help wanted
Don wrote:
My problem is that the torque amplifiers have 50V 3-phase motors (50Hz, 1/40 hp, 2750 r.p.m.) which are integral to the units. Repowering them with single phase or D.C. motors would be a mission and I am attempting to build a 3 phase 50V power supply to run from single phase domestic supply (230V, 50Hz, neutral-earthed).What you really want is a servo amp for AC servo motors (induction motors rather than permanent magnet brushless). These definitely exist, and are what many of the high-end machine tools are now using. Yaskawa, Rockwell/Allen-Bradley, etc. are making these drives now. A rotary converter is not of any use, because it will run the motors at constant speed. You need a drive that can move the motors from creep to full speed. Oh, but wait! 1/40 Hp? You can't move a cutting machine with a 1/40 Hp motor. My underpowered Bridgeport retrofit uses 1/8 Hp DC servo motors, which can produce 1/2 Hp peaks for a moment. I think you should find some stepper motors or good-sized servo motors to do the job directly. Using motors to drive amplifiers to drive bigger motors doesn't make any sense to me. search eBay for used servo amps, they do come up pretty regularly. Jon |
to navigate to use esc to dismiss