Topics

1

LazyCam (Beta) / Rapid height - plunge clearance between each pass

« on: July 10, 2012, 03:51:21 PM »

Hi.
I have used lazycam for a while now, and also bought it.
I have a problem though. When i do multiple passes, lets say i cut 9mm total with passes of 1mm, the Z goes up to rapid height and/or plunge clearance betwwen each pass...
This is very time consuming and reallly annoying!
I have searched the net for solutions but so far i have found nothing.

Here is an example of code generated with lazycam:

N5 (File Name = holdertillimitswitch on Tuesday, July 10, 2012)
N10 (Default Mill Post)
N15  G91.1
N20 G0  Z2.0000
N25 M3
N30  X15.0000  Y15.0000
N35  Z0.1000
N40 G1  X5.0000  Z-0.2500  F7000.00
N45 G0  Z2.0000
N50  X15.0000
N55  Z0.1000
N60 G1  Z-0.5000 
N65  X5.0000   
N70 G0  Z2.0000
N75  X15.0000
N80  Z0.1000
N85 G1  Z-0.7500 
N90  X5.0000   
N95 G0  Z2.0000
N100  X15.0000
N105  Z0.1000
N110 G1  Z-1.0000 
N115  X5.0000   
N120 G0  Z2.0000
N125  X15.0000
N130  Z0.1000
N135 G1  Z-1.2500 
N140  X5.0000   
N145 G0  Z2.0000
N150  X15.0000
N155  Z0.1000
N160 G1  Z-1.5000

There must be a solution to this?

Regards Nic

2

General Mach Discussion / G540 output problem and reset fo estop

« on: February 29, 2012, 10:24:42 AM »

Hi. I am the happy owner of a gecko G540.
I have a problem though, or two that is.

I use one of the outputs to set my VFD drive in run mode and start the spindle. The problem is that if the gecko is off the output goes on... but if i turn on the gecko the output goes to off unless i enable it in mach3. The resistance between 0V and the output is to low to not enable the output when the gecko is without power. I can off course always turn the gecko on with the VFD and there is no problem. But when i turn of the system, the VFD will start to spin for a second until the capacitors in it has discharged...
What to do!?

Then i have another little problem. If i press the big reset button in mach the gecko does not disable!? So if i press my emergency stop and release again, the gecko just enables without me having to reset it in mach3.. For security reasons i really wan't the mach3 to do disable the gecko when i hit the reset and enable when i hit it again.

Help will be appreciated!

Regards Nic

3

General Mach Discussion / Max speed Gecko

« on: October 29, 2011, 08:59:14 AM »

Hi everybody.
I just bought myself a Gecko G540 to replace my china driver board. And boy does this make a difference! I was running at about 2500mm/min rapid with the china board and now i am running 3750mm/min without missing a single step.
But now i am eager to test the max speed. But i can't raise the speed higher than 3750mm/min. I have set the acceleration to 800mm/min and it does 400 steps per mm.
If i set the speed higher it just changes back to 3750.. Why?

Also have anyone tried to trim the gecko with the potmeter? As far as i can see the steppers run smooth, and it doesn't change if i turn the pot.. I am running at the 2r/s as suggested in the manual for the g540.

Regards Nic

4

Third party software and hardware support forums. / Stepper amps and voltage

« on: October 25, 2011, 03:51:57 PM »

Hi everybody.
I have recently bought a couple of steppers and a Gecko G540, but I am not sure how many amps and volts my steppers should take. I have to add a resistor on the db9 connector on the gecko, the rated amp X1000 that is 2kOhm if the rated current is 2A.
If i got this right, it will take 4Amps when in parallel, and 2V X 20 = 40V - that means i will have to use a 3.5Kohm resistor as the gecko can only provide 3.5amps maximum and 40v? or should i use 48V?

Regards Nic

5

General Mach Discussion / Not accurate at high speed

« on: October 07, 2011, 08:04:28 AM »

Hi, i have made myself a CNC-router to cut in wood. It has a rapid of 2500mm/min. The problem is that if i try to cut at these speeds it makes a the sharp edges of my object round. It doesn't reach the corners of my project... I can hear that the steppers isn't loosing steps, they sound just fine. If i cut at lets say 500mm/min, it reaches the edges everytime. Is there a parameter in mach3 that is set wrong or are my acceleration to low? I just thought mach3 took the acceleration in consideration when cutting?

I can't quite figure this one out on my own, and my guess is that it's just a simple thing that some of you bright minds know everything about

Regards Nic

6

General Mach Discussion / Loosing steps when milling slowly

« on: February 26, 2011, 01:35:56 PM »

Hi.
I have tuned my steppers in mach3 and they run smooth at 1000mm/min with acc. set to 200.

Now the speed is to high when cutting in wood, so in my gcode the plunge rate and feedrate are set to 400. But when i do this the steppers doesn't sound right and they loose steps.
I also tried to tune the steppers at 500mm/min, this also causes them to loose steps.

I only thought that i would loose steps when going faster??
But as it is now i can't run my mill slow, so i can't cut in the materials i wan't.

I just can't figure this out, so if you got a clue please feel free to post suggestions! :-)

regards Nic

7

General Mach Discussion / Motor tuning issue

« on: September 24, 2010, 03:33:48 PM »

Hi.

I am new to mach, and am trying to get my motors tuned.
They sound good and run very well, but the scale is wrong.
The steppermotor turns 1.8 degrees per step, that is 200 steps per rev. My driverboard is set to half step, so that is 400steps.
1 rev is moving my gantry 1mm. I have set mach to mm, not inches.
But if I draw a 5cm line and get's mach to cut it, it's absolutely not 5cm. To get a line of approx. 5cm i have to set the steps/mm to 13!

I just don't get it... So if any one do, please reply! 

8

General Mach Discussion / mach 3 problems

« on: March 01, 2010, 10:43:11 AM »

Hi.
I have converted a proxxon mf70 to a simple 3-axis machine. At first i tried to use mach 3, but my steppers just sounded awfull... I then tried kcam, and found that whit the same settings as i applied in mach 3 it runs really nice. I am running win xp, 200steps/mm at a rate of 100mm/min. My driverboard is from cncgeeker . com. I just can't figure out why the heck mach3 can't run my steppers...
Any suggestions?

Thanks in advance!