Messages

71

General Mach Discussion / Re: Rotary Axis softlimits

« on: August 28, 2007, 06:59:51 PM »

F will remain the same, Feedrate. If you are refering to just A move, it should be in degrees per minute, as Degree = 1 unit.

72

General Mach Discussion / Re: Tunning question "CamTronic's"

« on: August 22, 2007, 04:41:31 PM »

I have to say that I have a system from here http://www.lowcostcncretrofits.com/ and there are geckos inside, I am not sure what the numbers are 320 340 but I have 2-600oz servos, and 1-1200 and NONE of the HUM.. It is true that you will not hear them while running but I feel like this will result in a fault at some point in time. I have the geckos and a galil 18x2 all withservos and my servos do not HUM. It took a little while to tune the Galil but while tuneing them I found that the slightest HUM would soon result in a fault. There may be a little hum allowed with geckos but it realy shound not be very loud, or there is a problem...

A servo with a bad hum is poor tuneing, or loose motion, or poor amp tuneing, or an encoder problem.
At this time we have only tried motor tuneing and checked for mechanical slack, and both are ok.
We have not tried amp tuneing at this time, but will I am sure.
I am pretty sure that the encoder is ok, as it would have faulted out the drives during his testing.

Ok, for a minute I will go along with the crowd and say humming is ok. BUT I just can't.

Does everybodies HUM? dgoddard's is 3 axis and two different hums(z,y same and x is a bouncing hum), so if there going to hum I am sure that they would do it consistantly?

73

General Mach Discussion / Re: Tunning question "CamTronic's"

« on: August 13, 2007, 11:08:53 PM »

It's a pretty consistant hum... On Y and Z, and the pulse is on X.. It holds position and has no poblems with rapid moves. I am going to look into tuning the drives. I may be over reacting but it seems loud..

Marc

74

General Mach Discussion / Re: Tunning question "CamTronic's"

« on: August 13, 2007, 10:26:27 PM »

Not really an operational issue, just did not think it should make noise... It's a sign that tunning is off, true?  No on the Gecko tuning, but I will look into it.. Thanks for the reply...

Marc

75

General Mach Discussion / Tunning question "CamTronic's"

« on: August 13, 2007, 06:14:04 PM »

Hey Fellas,

I have a freind whom has just completed his benchtop mill. He outfitted it with camtronics. What we have is a bad "HUM" on Z and X.     Y then seems to have a plus "HUM". We have the caculations of the steps correct, and have attempted to tune from the lowest extreme to the highest useing Mach3 Volicty and Accel..

His caculations are 30,000 on X and Y and the Z is 60,000. We have the step Dir at 1 and 5.

The kernal is 25,000, which I trtied 35k and 45k. No change. (the processor speed on the pc is 1.6ghz)

Our best setting on X and Y were 46.5 and 12.5. Z is 22.4 and 6.2.

The encoders are 500s.

He has .200 ballscrews geared 4:1 on X and Y. Z has a worm to Rack to 4:1 belt.

Y has a very little backlash which he is working out to be null. Other than that there are absolutly no mehanical problem that would cause the motors to hum.


Ok... I know that there is a galil plug in, can we tune camtronics/mach3 with the galil wsdk? I just think that the tuning method in mach3 is less detailed, but I may not totally understand the differance between the 2 different tuning methods..

I am 10000% sure that the motor should not be humming as I have an identical motor hooked to a low-cost-retro system, and it does not hum.

Thanks for the help in ADVANCE..

76

General Mach Discussion / Re: limit switches and cable sheilding

« on: August 03, 2007, 04:28:09 PM »

How many wires are in the cable you are using? If it's 2 and 1 ground, have you grounded one end at least? If it is more than 2 you should consider changeing them out... The more wires you have the more antenna you'll have...

77

General Mach Discussion / Re: THC 300 JERKS OR DOES NOT WORK?

« on: July 31, 2007, 03:56:50 PM »

I have... I am working on getting the screen set to work properly... There are things missing that can be adjusted and maybe fix it... I have the destinations all screwed up... I think I may have to dump mach 3 and do a total reinstall.. You guys have made such an open program it takes a little to get the paths figured out.....

I / we think it is Rate on the thc....

Thanks...

78

General Mach Discussion / Re: Z home before cycle start?

« on: July 28, 2007, 07:04:51 PM »

You should "CALL" Z0 in the program start in each program. You will see that Z is called to .5 before any other axis are called for motion.. It's line N0090.


N0030 G20 (Units: Inches)
N0040 G53 G90 G40
N0050 F1
N0060 S500
N0070 (Part: joesbull)
N0080 (Process: Plasma,  MAKE2D VISIBLE LINES, 1/8 inch .140 run height)
N0090 G00 Z0.5000
N0100 M06 T2  (1/8 inch .140 run height)
N0110 G00 Z0.5000
N0120 X2.5704 Y2.6379
N0130 Z0.1000
N0140 G28.1 Z  0.12

79

General Mach Discussion / THC 300 JERKS OR DOES NOT WORK?

« on: July 28, 2007, 06:05:19 PM »

Anybody got a thc 300 working?
If so how did you adjust the volts?

Attempted to adjust by following the directions with pots in the middle range, not happening for me.

 Mine does this >If you turn the pots the maximum counter clockwise it will dive into the table. If I start out that way it will jump up off the table about 2 inches and stop.

If I ever get it close to set it will jerk up and down as if it were trying to settle in, but never does...

It either jerks and makes a horriable cut or dives or raises to high to cut.

Really need some questions answered.

machine is a miller 2050.. tips are 35 amp, extended electrode machine torch with floating head. best speed with this problem is 60 but have tried as low as 50 and as high as 90. I am cutting 1/8" cold roll. Air is filtered by a 2 stage dryer at the tank and another just before the torch, it's 15 hp so plenty dry clean of air.

Also did you get your screen set for mach 3 thc 300 to work? I have not gotten mine to work. It's missing backgrounds and buttons on a few screens...
 
Help get this running please.

ALSO POSTED ON CNCZONE..

80

General Mach Discussion / Re: Automatic touching

« on: July 28, 2007, 07:32:20 AM »

You can also use an auto touch off for plasma or torch cutting with thin material. It mounts differently, like on the torch.. It will allow you to keep a Z0 everytime you start a new cut... I use it with a thc 300... I love it...