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Re: Laser Displacement triggers.
I will be happy to see this Art.
Thank You, Tom --- In mach1mach2cnc@..., Art <fenerty@a...> wrote: If Tom is out there:triggers. You can set a grid that will make the DigTrigger output trigger for20-40 us each time the X or Y axis moves a specific distance. This means ifyou set the grid to 2mm's and do a G0X10, you will get a trigger at0,2,4,6,8, and 10 mm's.problem entirely. You could hook the sensor to a laptop and simply save thedata as a grid of 3d as it comes in I suppose. At any rate this featureshould be enough for you to start or test development. It is also the coretiming code for pin-prick engraving as it is now possible to tie graphic datato a decision to pulse the pin during an active movement. |
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Re: Mach 2 Breakout Board
Mark Esser
James,
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Using the PWM controller that you can get from littlemachineshop.com for the Mini Mill (Harbor Freight, Grizzly) I have rewired it so that the Estop Button kills the PWM power and at the same time send the Ground Signal to your Mach2 Breakout box (via optocoupler). Part of the rewire places a second switch on the control head that allows me to disable the safety start up switch. The var. pot control seams to be nothing more then an adjusting voltage divider. My thoughts are build a 0 - 10 volt dc PWM integrator to feed the wiper of the pot. Add a SPDT switch to select the feed of the wiper lead (pot or PWM) I have built an opto-tach pickup on the spindle of the Mini Mill for feed back. I have designed most of this and have tested it on a breadboard. I will be willing to share the data with you and help in the design. However, I do not have the time to do a PCB layout (hate doing that anyway) and have enough on my plate with My primary job of designing and building Microwave Data Link systems and Laser Data Systems. If you are willing to share with me the pinout and port assignment you have for your extension port. I will finish the Breadboard and send you the design, so that you can tweak and refine it. I can be reached directly by sending me email to mark@.... Outside of this forum I will give you more details. Best of Luck from one EE to another. Mark Esser -----Original Message-----
From: James Cullins [mailto:jcullins@...] Sent: Friday, August 15, 2003 9:08 PM To: mach1mach2cnc@... Subject: Re: [mach1mach2cnc] Mach 2 Breakout Board Mark What brand of drive do you plan to use for your spindle speed control. I am finding that each has it's on method of starting and direction control. Some start when you select the Fwd or the Rev separate inputs. Another one uses the two dir switches and a start sw . Some you select Dir by closing the dir switch for FWD and open for REV, then close the run switch to start. I want to design it to accommodate all variations if possible without getting to crazy. any input would be helpful in getting it done quickly. I have the speed control working an it is electrically isolated . I want to design a simple one for speed control and only FWD dir. That should work with any of them, ( I think ). Then one with the Manual/Auto operation with Manual speed pot, dir, start, stop, and Manual/Auto switch. Auto mode will allow Mach2 to control the speed and direction. I have been trying the KB drive but find it extremely noisy, and requires some trial and error methods of reducing the noise interference enough to keep it form causing the PC from going nuts. Any drive recommendations ? Thanks Jim ----- Original Message ----- From: "advta1" <mark@...> To: <mach1mach2cnc@...> Sent: Friday, August 15, 2003 5:45 PM Subject: [mach1mach2cnc] Mach 2 Breakout Board I just got my New Mach2 Breakout Board from Bob Campbell Designs. Yahoo! Groups Sponsor ADVERTISEMENT < 97:HM/A=1712983/R=0/SIG=11u38u3s2/*http:/hits.411web.com/cgi-bin/hit?page=13 74-105951838331032> click here < l/S=:HM/A=1712983/rand=473945881> To unsubscribe from this group, send an email to: mach1mach2cnc-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! <> Terms of Service. |
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Re: Mach2 jog keys lag
Very strange,.this is probably related to an external issue andseems to be affecting the GUI timing. I haven't heard of it before. I will giveit some thought. What speed CPu is this? ANything running in the background? 700 mhz celleron. Just the usual windows stuff running in the background. I'll try turning some things off in the task manager and let you know if it helps. Derek |
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Mach2 jog keys lag
Hi art my x y and z axis jog keys have a large delay when I load in
Gcode.I push the key and it takes a moment for it to engage and when it does it moves quite a distance after I let up. this was happening on rc7 and now 10. It appears that the larger the file size the longer the delay. As it is now I have to close the file whenever I want to jog with any kind of control. I'm using the special driver . derek |
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Re: Laptop Computers
Steve Blackmore
On Fri, 15 Aug 2003 22:29:49 -0700, you wrote:
Looking at laptop computers to run Mach1Mach2.I still use an old Toshiba Satellite 4080XCDT PII 366Mhz with 192Mb ram on XP Pro for bench testing interfaces etc. It works fine at 25KHz with network disabled. Network polling kills the pulse train. Also look for a machine that does not share video memory with RAM. I don't use it anymore in the shop, got sick of taking the keyboard out and removing swarf particles ;) I'm now using an old server I got for nothing. It's a 500Mhz twin Pentium job, with only one processor (twin processors don't seem to work any more with Mach2) 1Gb of memory and all SCSI drives, it's fine at 25 & 35KHz, but struggles at 45. It's also got a decent video card with 128Mb memory which helps a lot. The swarf problem has been fixed by putting the keyboard on a sliding drawer under the bench and using a pendant when running. -- Steve Blackmore |
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Re: Laptop Computers
I am no expert on the subject, but have a little experience. My Toshiba
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Satellite 1905-S303 (P4 2.4 with dedicated video memory) workes perfectly with Mach2. I was trying to help a Denver local get Mach2 going on a Toshiba Satellite with a 2.0 Celeron and shared video memery and it had problems in that the pulse frequency would jump all over the board. This caused rough and erratic motor motion. When I was shopping for my laptop I got the clerk at Best Buy to allow me to install Mach1 on the model I was interested in. I than ran ocxtest.exe and picked the one that gave me a steady pulse number. Tim [Denver, CO] Sherline & Taig products at Deep Discount Mach1 & DeskCNC with credit card ordering www.KTMarketing.com/Sherline e-mail me at Timg @ KTMarketing.com for items not yet listed -----Original Message----- |
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Laptop Computers
Looking at laptop computers to run Mach1Mach2.
Any input would be very helpful. Which ones work and which ones have had problems running the program. I do remember laptops that do not have share memory will work better but don't remember why. Art has recomended 500 mhz, 128meg ram. Any other info you can provide would be helpful in selecting a laptop. Thanks _________________________________________________________________ MSN 8 with e-mail virus protection service: 2 months FREE* |
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Laser Displacement triggers.
Art
If Tom is out there:
Next version will have a development tool for laser displacement triggers. You can set a grid that will make the DigTrigger output trigger for 20-40 us each time the X or Y axis moves a specific distance. This means if you set the grid to 2mm's and do a G0X10, you will get a trigger at 0,2,4,6,8, and 10 mm's. How you get the data and what you do with it may be another problem entirely. You could hook the sensor to a laptop and simply save the data as a grid of 3d as it comes in I suppose. At any rate this feature should be enough for you to start or test development. It is also the core timing code for pin-prick engraving as it is now possible to tie graphic data to a decision to pulse the pin during an active movement. Thanks, Art www.artofcnc.ca |
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Re: g28.1 again (and again)...
--- In mach1mach2cnc@..., "caudlet" <thom@t...> wrote:
--- In mach1mach2cnc@..., Art <fenerty@a...> wrote:andTodd:never use probably find this problem fairly quickly. It must be a bug. Whenthe THC isturned off, the offset for it automatically zero's. I probablymissedsomething and never noticed. It probably only shows in G28 movesand thenonly in THC. Clipped from earlier message 223: "I ran across this more by mistake than by design. I have modifed my Post to do the following: G70 F84 G90 M05 G4P1 G01Z0.500F40 G00X11.780Y3.789; move to start of cut G01Z0.250F40 ; lower head to .250 (piercing height) G4P1 M03F80 ; Turn on torch, reset speed to 80 IPM G00Z0.135; Lower head into cut at full rapid G01X11.670Y4.013; first line of cut params The above works fine By chance I edited and changed the G00Z.135 to a G01Z.135 and the THC hold does not work. The program takes off prior to the arc being established. So with the THC on the following does not recognize the HOLD. F84 G90 M05 G4P1 G01Z0.500F40 G00X11.780Y3.789; move to start of cut G01Z0.250F40 ; lower head to .250 (piercing height) G4P1 M03F80 ; Turn on torch, reset speed to 80 IPM G01Z0.135; Lower head into cut at 80 IPM G01X11.670Y4.013; first line of cut params Weird huh? The max speed on my Z is 60IPM but why would that effect the program Hold on the THC? It lowers okay but the arc starts about 1/2" from where it should since I have no pause on Spindle Spin up. Normally the THC hold takes care of it. TOM C" This is not the aluded to problem but there are some irregularities when running in THC mode. You might want to address this issue while you are fixing the 28.1 one. |
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Re: g28.1 again
--- In mach1mach2cnc@..., Art <fenerty@a...> wrote:
Todd:never use THC, as I have no Torch or anything...). I will activate the THC andthe THC is turned off, the offset for it automatically zero's. I probablymissed something and never noticed. It probably only shows in G28 movesand then only in THC.Told you!........TOM C |
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Mach 2 Breakout Board
advta1
I just got my New Mach2 Breakout Board from Bob Campbell Designs.
This is a great addition to both mach1 and mach2. Easy to integrate and works very well with the system. I am now waiting for the add on board for controlling the spindle motor! Hope it is real soon. I am ording a second Mach2 breakout board today so that I can build the axes to my HIGHLY MODIFIED Harbor Freight Mini Mill. I have just finished building the Mech for Tilting the Head. Take a 600 oz NEMA 34 Stepper, a good gear ratio, a Ball Screw and a sliding spline shaft to do, but looks very good. Damn Cheap mill with some good rework and you have a fantastic designing station. I also, just got visualmill for my Rhino3d Cad to aid in the CAM work. The fun is in creating! ART keep up the good work, I am very happy with what you have done so far. It is worth every dollar (and then some) for what you have here Mark Esser |
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Re: g28.1 again
Art
Todd:
That explains why I couldn't find it, I was not using THC. (I never use THC, as I have no Torch or anything...). I will activate the THC and probably find this problem fairly quickly. It must be a bug. When the THC is turned off, the offset for it automatically zero's. I probably missed something and never noticed. It probably only shows in G28 moves and then only in THC. Thanks, I'll let you know... Art www.artofcnc.ca |
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Re: g28.1 again
morgtod
--- In mach1mach2cnc@..., Art <fenerty@a...> wrote:
Todd:settings, and when you want to "zero" your machine coordinates, just hitthe "ref" snip- Hi Art, I think I found something, I ran a file 5 times with out the thc and things worked as expected. I ran the same file twice with the thc on and no amount of zeroing or referancing would give the correct positions. Are the thc offsets tied into the z offsets? Is there a way to clear the thc offsets while doing a thcoff()? Is there a way to call the homez button from gcode or macro with out using a g28.1z?, so it will referance from the current location without rapiding first? Thanks Todd |
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Re: Pin reversals fixed!!
Steve Blackmore
On Fri, 15 Aug 2003 09:25:02 -0300, you wrote:
As to the distorion, does hitting regen do any good. Regen was put in soAdded a button.. Regen does centre the display, but does nothing about the distortion applied by tool offsets. Had to give up testing for tonight, it's past complaining neighbour time <G>. -- Steve Blackmore |
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Re: g28.1 again
Art
Todd:
Just turn off the home switches, select Auto-Zero in the Logic settings, and when you want to "zero" your machine coordinates, just hit the "ref" button. It will zero on the spot because you have no home switches. But if you do that, the G28.1 will not work. The only reason a G28.1 works is because it knows where "true" zero is at.So if you wish to use G28.1 then you have to have a stored referance to true zero. The way your zeroing is fine, but you have to understand the zero CAN be undone only at your command. G93.1 . I can't have the G28.1 remove the offsets automatically, because that would screw the verification proceedures with Verify and such. It would probaly be easir to simply code G28.1X1G92.3 when ever you use G28.1, then the zero acts the way you expect. Thanks, Art www.artofcnc.ca |
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Re: g28.1 again
John Guenther
Well, the way I do it is load the program, move the table to where I want
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0,0,0 to be and click on the "Ref All ctrl A" button to establish that at 0,0,0 Seems to work for me, there may be other ways but this seems to work. There are no offsets, no home switches, no g92's g28's, no extrema offsets, no nothing just plain old, like I just turned on Mach2, 0,0,0. John Guenther 'Ye Olde Pen Maker' Sterling, Virginia Hi Art- |
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Re: g28.1 again
morgtod
--- In mach1mach2cnc@..., Art <fenerty@a...> wrote:
Todd:for that snip- Hi Art- thanks for the in depth info, I think my problem is I am using the wrong command for zeroing. What command lets me load a file, turn on my cnc table, jog to the position that I want for 0,0,0 , and will make the current position 0,0,0 with no offsets, no home switches, g92's g28's, no extrema offsets, no nothing just plain old, like I just turned on Mach2, 0,0,0. Thanks Todd |
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Re: Tool offsets problem
Steve Blackmore
On Fri, 15 Aug 2003 14:04:05 -0300, you wrote:
Your right, of course, I have only put in Radius programming, so theI don't know what a gauge is in this context, or how I would use one? Let me know how the zeroing experience goes, its the easiest method IYour method does work but seems overly complicated, especially confusing is the use of the word "fixture" Fixtures to me are work holding devices. The simple method is as I outlined earlier, two boxes, one to enter "job length" and the other to enter " measured stock diameter". Press return & program makes appropriate adjustment to X DRO depending on whether Radius, or Diametric GCode is in use - this would either require a setting box, or use appropriate Gcode (although I don't know any valid ones)? Z is straightforward. I WILL fix the tool offsets though. Should they be , in lathe, a positiveThe tool tip with correction should read the proper dimension from work zeros. I've been experimenting for the last hour, certainly X offsets are completely weird. If I have a negative value in tool table for X offset - the first facing move, the tool starts too far in, I had to stop before it crashed, setting value as plus, the tool seemed to cut the facing move ok, but then after reversing out it seemed to go too far and the first roughing cut was 6mm further out than the outside of the stock diameter, instead of .5mm in?? Stock radius seems to be getting added/subtracted somewhere it shouldn't maybe? -- Steve Blackmore |
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