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Author Topic: gecko540 problem under mach3  (Read 14761 times)

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gecko540 problem under mach3
« on: October 08, 2011, 08:52:12 PM »
I can not believe that  you can set 100% perfect gecko540 with mach3 , I am working on this more then 4 months I have a big cnc machine sx3 This problem began  when I changed it to cnc. at small distances 40mm x 40mm 30mm hole in the middle , the  machine  cut  me  Y axis 40mm X axis 40.22mm inside  hile  is prefekt 30mm.
at a distance 140mm x 416mm the machine is  cuting 140.27 Yaxis  and 416.32 X  axis  I checked a dozen times my backlash , on Y axis is 0.01mm 0.0004" on
X axis  0.016mm 0.0006" in a machine that weighs about 250 kg seems to be ok, This was not so easy to get this result but my whole machine is converted, My machine has THK Linear and, therefore, this backlash has improved by up to 0.07mm I do not know what more to change? in setting mach 3 to remove the problem hell me please

sorry for my english, I trying to write as best I can
« Last Edit: October 08, 2011, 08:53:55 PM by komar1970 »

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Re: gecko540 problem under mach3
« Reply #1 on: October 09, 2011, 01:58:58 AM »
Can you attach your xml so I can see what your settings are without having to ask 100 questions :)
Hood
Re: gecko540 problem under mach3
« Reply #2 on: October 09, 2011, 10:11:45 AM »
that is  file

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Re: gecko540 problem under mach3
« Reply #3 on: October 09, 2011, 10:43:56 AM »
What kind of screws do you have?
Your config looks ok except you have the E-Stop set to pin 16 and that is an output pin so it is wrong.
Hood
Re: gecko540 problem under mach3
« Reply #4 on: October 09, 2011, 10:44:01 AM »
motor  tunning 1
Re: gecko540 problem under mach3
« Reply #5 on: October 09, 2011, 10:45:39 AM »
i have  16mm pinch 5mm ballscrew
Re: gecko540 problem under mach3
« Reply #6 on: October 09, 2011, 10:47:53 AM »
how it should be set?

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Re: gecko540 problem under mach3
« Reply #7 on: October 09, 2011, 10:57:27 AM »
Run the driver test and see if the graph looks flat.
You could try using sherline mode but to be honest it sounds like a mechanical issue as your steps per unit are set correctly (assuming direct coupling of motors).
Hood
Re: gecko540 problem under mach3
« Reply #8 on: October 09, 2011, 11:19:19 AM »
I have zero backlash coupling. so tell me how to set the E-STOP  . In  MACH3 I have opportunities to set the step pulse , and also there is a problem if I set the distance of 1 cm  10mm , machine goes to 10mm distance so I have to enter in mach3  how far the machine is moved,  the  digital indicator shows me 10mm .it means that it is ok. So why in the distance of 70mm   digital indicator does not show  the machine defeated this distance. I just set in the 1 cm and very possible I should in set at 5cm or 10 cm thanks  for  felp
« Last Edit: October 09, 2011, 11:27:49 AM by komar1970 »

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Re: gecko540 problem under mach3
« Reply #9 on: October 09, 2011, 11:33:01 AM »
You set your steps per unit to match your hardware, if your hardware is accurate then so will the output.
You have Geckos so microstepping is 10 and your steppers are 200 per rev so that equals 2000 steps per motor rev. Because you have direct coupling to 5mm pitch ballscrews one motor rev will equal 5mm axis travel. So the steps needed for 1 unit (mm in your case) is 2000/5= 400 and that is what you have.

You could try using Sherline mode to see if that helps, it is on Ports and Pins main page.
Does the driver test look ok? To run the driver test close Mach then look for drivertest.exe in your Mach3 folder and double click it.

Hood