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Re: g41 question again--forget it
--- In mach1mach2cnc@..., "davesmachines"
<techdave@r...> wrote: Gentlemen,path and the offset tool path like I have seen elsewhere. There is noHi Tom and all: I believe that one of Art's priorities upon return from his vacation will be to "upgrade" the toolpath display. I think he will be redoing it to more closely achieve a true "WYSIWYG"....something I will really like! |
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Re: Mach2 Missed steps but not????
Ted Gregorius
Now that you point it out I agree that I gained steps in Z when doing the photo engraving. It seemd fine about two thrids of the way through and then started diving deeper and deeper on each pass.
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I was doing an XY engraving and it seemd that at one point each change in y drove the z deeper into the work. I've done a bunch of these before with 3.x and never saw this. I will retry this engraving tonight with CV mode off and see what happens. Ted Gregorius (Pres) TAG Systems Racing Products, Inc. www.tagrace.com ----- Original Message -----
From: Digital audio Pro To: mach1mach2cnc@... Sent: Thursday, March 11, 2004 11:01 AM Subject: RE: [mach1mach2cnc] Mach2 Missed steps but not???? Ted. All this is strange. i got my problems engraving a complex font with a V cutter and version 4.0a (lots of vertical small moves). The strange thing is the lost steps are not in the logical direction, i mean, with my Z spring setup, i should lost step in the + direction, but in the end of the cut the mill was too low, about 1 mm, that's a lot gained step, in the wroong direction. Normally the losts step should be in the + direction, because of the spring and the cutting forces. I was using constant velocity too, and didn't try exact stop because it would shake the table too much with my acceleration settings. The lowering of Speed and acceleration seemed to solve partially the problem, but i'm not sure he disapeared completely, because when i make a verify position, i always get high gained step values, 2 or 3 times higher than X or Y axis, and always in the same direction, this confirm it is not a reference sensor repeatability problem. Real mach2 problem or mechanical resonance.... ?? Anyone with similar strange gain steps on Z axis, - direction ? Olivier. ------------------------------------------------------------------------------ Yahoo! Groups Links a.. To visit your group on the web, go to: b.. To unsubscribe from this group, send an email to: mach1mach2cnc-unsubscribe@... c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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g41 question again--forget it
Gentlemen,
G41 is working. I had different expectations in what the screen would display. I thought the screen would display the un-offset path and the offset tool path like I have seen elsewhere. There is no problem with the way it works. I just had different expectations, and was unfamilar with what to expect. Tom |
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g41 question again. Help?
Since last evening, I have been trying to get the g41 g code to work.
One time it worked and displayed the ofsetted tool path on the tool path display, so I know it can work. In the tool table it has the option of offset on/off. I mouse click on the button, and the led comes on. Then I run the program and it does not work. How can I get the function to stay on? I am going to turn off the "offset off" in the logic setup screen for m30 and try that, but I don't think that is or should be the issue. I need g41 to work every time it is invoked. Tom |
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Re: Mach2 Missed steps but not????
Ted. All this is strange. i got my problems engraving a complex font with a
V cutter and version 4.0a (lots of vertical small moves). The strange thing is the lost steps are not in the logical direction, i mean, with my Z spring setup, i should lost step in the + direction, but in the end of the cut the mill was too low, about 1 mm, that's a lot gained step, in the wroong direction. Normally the losts step should be in the + direction, because of the spring and the cutting forces. I was using constant velocity too, and didn't try exact stop because it would shake the table too much with my acceleration settings. The lowering of Speed and acceleration seemed to solve partially the problem, but i'm not sure he disapeared completely, because when i make a verify position, i always get high gained step values, 2 or 3 times higher than X or Y axis, and always in the same direction, this confirm it is not a reference sensor repeatability problem. Real mach2 problem or mechanical resonance.... ?? Anyone with similar strange gain steps on Z axis, - direction ? Olivier. |
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Mach2 Skipping over M09
Hi
I know Arts not around but I thought I'd throw this out anyway. I have a machine running Mach2 that I'm developing that uses a solenoid controlled by a solid state relay. I have it hooked up so that a M07 turns it on and M09 turns it off. I can run a file and have it work flawlessly for 50 times or so then for no apparent reason it skips the M09 command. When this happens the mist LED continues to flash so its not a case of my relay or solenoid sticking. This has happened through many versions of Mach not just the currant version. I know I'm using the M09 command a lot more than most users so this one might be kind of tricky to figure out. And obviously if your mister stays on it's not the end of the world. Unfortunately when this happens to me it can ruin a days work. Thanks Derek |
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Re: Mach2 Skipping over M09
Scott Wilson
also using a ssr to drive it.
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tig415 wrote:
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Re: Mach2 Skipping over M09
Scott Wilson
i dont seem to have the problem....i use m07/m09 for up/down solenoid on
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a PCB engraving machine ....runs for hrs at a time up/down/up/down etc tig415 wrote:
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Re: Mach2 Missed steps but not????
Ted Gregorius
I've been running a production job on my mill using M2 vers 3.x for months with no problems
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Updated to 4.0 and played with some engraving stuff over the weekend and had some strange Z problems. Switched over to the production Job on Monday and destroyed a bunch of product. As the production job is a multiple slot and drill job I can't see any Z problems BUT I definetly have X & Y problems. I know the tunig is correct but I slowed it down and wreck another batch. I looked at it again this morning almost ready to put 3.x back on and I noticed that the CV mode was ON. I have never played with CV mode and I know it was not being used when I ran on 3.x. I switched to EXACT STOP mode and had my first succesful production run with 4.0. Houston, I think we have a problem. (or is that Cancun) Ted Gregorius (Pres) TAG Systems Racing Products, Inc. www.tagrace.com ----- Original Message -----
From: Digital audio Pro To: mach1mach2cnc@... Sent: Thursday, March 11, 2004 5:30 AM Subject: RE: [mach1mach2cnc] Mach2 Missed steps but not???? same experience with Z lost steps. I had to lower the acceleration and max speed at 1/2. I thought it was a mechanical resonance problem, but is always a bit strange to me because my Z was designed to support max speed and acceleration, as my X and Y axis. Perhaps it's a motor issue... don't know. i have no problems with X and Y axis, i can use them at max speed - acceleration. I will wait for the Gecko 2002 to see if it was a mach2 pulse timing problem. i'm using 75V on the steppers... Olivier. Yahoo! Groups Sponsor ADVERTISEMENT ------------------------------------------------------------------------------ Yahoo! Groups Links a.. To visit your group on the web, go to: b.. To unsubscribe from this group, send an email to: mach1mach2cnc-unsubscribe@... c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
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Re: c axis position not displayed
Tom, you will have to modify the screen yourself with screen designer if you
want to see the C axis DROs. You can copy them from the diagnostic screen. But it will be simpler to use the A axis. Except if you have a lot of ever wrritten programs using C axis and you don't want to edit them. There is no functional difference between A,B or C. just the name and the DROs not the same. When you choose an angular axis, mach2 effectively send steps per degree to the step output. You can add a degree symbol (with a screen designer label) next to the DRO if you want. See "olivier.set" screen in the mach2 folder. I think this mode more importantly swap a couple of algorythms inside mach2 to manage angular moves synchronization with the linear axis (for example take in account the part diameter to compute the linear velocity of the angular axis). Olivier. |
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Re: want-to-be
I won't use lead screws on the plasma, just a chain loop and sprockets. I don't need the resolution on the plasma table. Where...In the US. I tried all of my sources and none had anything close to sizes I needed. Actually, now that I think about it, I could get long belts, just not long belts in the exact sizes that I needed. Once the ength got over a certain size, the available sizes stepped up in large increments. I needed something inbetween and I didn't want to buy a belt splicing tool. The plasma will be a belt loop drive, so I could buy a long belt and cut it to length. Ross |
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Re: Mach2 Missed steps but not????
same experience with Z lost steps. I had to lower the acceleration and max
speed at 1/2. I thought it was a mechanical resonance problem, but is always a bit strange to me because my Z was designed to support max speed and acceleration, as my X and Y axis. Perhaps it's a motor issue... don't know. i have no problems with X and Y axis, i can use them at max speed - acceleration. I will wait for the Gecko 2002 to see if it was a mach2 pulse timing problem. i'm using 75V on the steppers... Olivier. |
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Re: Mach2 Limit swithes
George, if you are in auto limit override mode, mach2 issue an Estop when
you hit a limit. After this you have to press the Estop mach2 button to go out of the Estop mode, and manually jog in the right direction to go out of the limit. That's all. If you don't use auto limit override mode, you will have to press the limit override button, (if not you can't go out of the estop mode), press Estop mach2 button, and keep limit override button down until you have joggeg manually out of the limit switch. If you release the limit override button before you are out of the limit, mach2 will return in Estop mode. Even if you use multiple inputs for + and - axis limit switches, mach2 can't actually inhibit the wrong direction to go out of the limit switch. You will have to be sure of what you do manually, or implement an external hardware logic control on the driver direction lines to do this, according to wich limit, + or -, is active. Don't forget you will have to re-reference the machine after a limit trig, because in most cases, with stepers at least, you will lost steps, specially if you have a hardware power off on limits, and if you hit the limit fastly. if you don't have a power off, servos can keep their positions. But i think the rule here is to don't trust the machine position after a limit trig. If your limit switches trig a general power supply power off, as it should be the case on good designed machines, you will have to add a "power supply override mode" when you press the override limit switch. So this switch will have 2 functions : 1 input to mach2 for Estop override, and 1 input to your power supply control circuitry to override the power off mode. You will need a 2 circuit switches, or a small electronic logic control, as i did. In my interface i'm using this last design, and it's working nice. Olivier. |
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Re: chord size in small arcs too big
Tom, according to Art, this chord problem is only a toolpath drawing issue.
But i didn't verify yet. I uploaded some time ago a picture of the problem in the file section : mach2 exact stop problem.jpg Only visible with very small parts, and problem present since early versions of mach2. Best regards, Olivier. |
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Re: Mach2 Missed steps but not????
Robin Szemeti
On Thursday 11 March 2004 06:41, kc8fws wrote:
My problem is when thereI had a similar experience on a machine .. I can jog the Z axis quite quickly, but in G01 or G00 moves, I have to set the accels MUCH slower and the max velocity down to ~1/3rd of what I can jog it at, because it just locks up. I put it down to rougher pulse timings in G00/G01, but who knows. I didn;t solve it, but I helped some by putting a few more volts on that motor. -- RapidCut CNC Technology CNC Plasma Cutter |
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Re: want-to-be
Robin Szemeti
On Thursday 11 March 2004 02:15, rrc62_03782 wrote:
well, I hope if you are considering chain and leadscrews for your plasma,Chain and sprocket is OK for driving things in one direction whereNot true....I'm driving my lead screws with chain and sprocket. I have a you also have a good supply of bellows, because plasma dust will ruin chain and leadscrews in very little time. Its an evil dust, highly abrasive. I agree that belts are much quieter. I used #35 chain because I couldn'tI can get belts up to 50m or so without problem, Ross-- RapidCut CNC Technology CNC Plasma Cutter |
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Mach2 Missed steps but not????
I have a bit of a problem i was hoping someone could give some
insight to. i've just finished the table on my mini-mill conversion. I am running 870 oz in powerpac steppers. My problem is when there is a G00 (or a G01 with a feedrare > 15 ipm) the steppers go nuts. They sound like they are binding up and just sit there and make a horrible noise. THis only happens running Mach2 I just ran the same program in Mach1 and it ran perfectly. I can also jog the axis manually at 30 ipm or so with no problems. I have played with the motor tuning to no avail. Im running G201s at 50V. Any help will be greatly appreciated. Thank You Mike |
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