Hello Guest it is August 20, 2019, 07:24:49 PM

Author Topic: gecko540 problem under mach3  (Read 14849 times)

0 Members and 1 Guest are viewing this topic.

Re: gecko540 problem under mach3
« Reply #30 on: October 10, 2011, 12:39:31 AM »
I noticed the problem is also in the end mill , if the end mill is a little pushed in COLLET runs to the side , and it also gives the parts is larger 0.06mm  on both axes
Re: gecko540 problem under mach3
« Reply #31 on: October 10, 2011, 12:54:06 AM »
Please explain what you mean by this:  "volts is ok, 3.5 for each 2,4,6,8"

I made a mistake has no to be current

gecko told me I should check if the gecko Outbound current in driver is ok  and is  ok  is not power
Re: gecko540 problem under mach3
« Reply #32 on: October 10, 2011, 01:08:32 AM »
Please explain what you mean by this:  "volts is ok, 3.5 for each 2,4,6,8"

What stepper motors are you using?
What kind of power supply are you using?  What voltage?  What current rating?
What current limit resistors are you using on the G540?


NEMA 23   620oz

motor   is  current 3.5A
 inductance 6.4   beacuse I am set   the setp pulse to 5   and speede  to 450
 resistors is 3.5   
power supply 350 48v

"inductance 6.4   beacuse I am set   the setp pulse to 5   and speede  to 450" - I don't understand this, since step pulse width has no relation whatsoever to motor inductance. 

"resistors is 3.5" - I hope 3.5K?

"power supply 350 48v" - 350 What??  What is the current rating of the supply?  What kind of supply - linear, regulated, switcher?

Those are rather high inductance motors, which will limit high speed performance.    Ideally, you'd want to be running those on an 80V supply.

Are you running any belt or gear reducers, or direct drive from the motors to the ballscrews?

Regards,
Ray L.
Regards,
Ray L.

Offline RICH

*
  • *
  •  7,351 7,351
    • View Profile
Re: gecko540 problem under mach3
« Reply #33 on: October 10, 2011, 05:48:58 AM »
komar1970,
You did not answer the following questions.
 
1.What computer are you using? Dose it have on-board graphics ( is it the Dell)?
 
2.What version of MACH?

My comments below and please don't respond to them.
- I didn't ask for a video. The video can  help as it will allow us to hear what the steppers sound like when you are
 runnning them. I need specific answers to every question that is asked and information on any item we request.
 Stay focused...... please.
- No need to post pictures of your configuration. That's why we  asked for the xml file.

- DO NOT  change that xml file  except as we suggest or as we modify it.
IE; You posted the xml file and the step pulse duration is 2 and direction is 0. Now in your reply #29 you say the pulse duration is set at 5.

RICH

Offline RICH

*
  • *
  •  7,351 7,351
    • View Profile
Re: gecko540 problem under mach3
« Reply #34 on: October 10, 2011, 06:03:04 AM »
Quote
I have a problem with prcision  of cutting  parts , people from MACH3 can not hellp me


We can  help you, but you need to help us help you. The above comment does nothing to resolve your problems.
The people here are very knowledgable, they have been there, done that and produce precision parts.
Knock off the attitude and reply to requested information.

RICH

Offline RICH

*
  • *
  •  7,351 7,351
    • View Profile
Re: gecko540 problem under mach3
« Reply #35 on: October 10, 2011, 06:12:26 AM »
Quote
I noticed the problem is also in the end mill , if the end mill is a little pushed in COLLET runs to the side , and it also gives the parts is larger 0.06mm  on both axes

That's spindle / tool runout and is a different problem. So noted. We will deal with each problem, but one at a time.
Stay focused on answering requested information.

RICH 

Offline RICH

*
  • *
  •  7,351 7,351
    • View Profile
Re: gecko540 problem under mach3
« Reply #36 on: October 10, 2011, 06:24:13 AM »
komar1970,
Please provide additional info on the motors.
1. Are all the motors the same for each axis?
2. Provide a link to the manufacturer or where you purchased them from. Need to know the exact motor model number.
3. Who manufactured the mill ? Provide a link to the maufacturer along with model number.

RICH


   

   
Re: gecko540 problem under mach3
« Reply #37 on: October 10, 2011, 10:50:21 AM »
ok  rich I will write again in one post.
My machine is SX3  is completely modified with THK SRS15 Linear Motion , ball screw  16mm pinch 5 , zero backlash coupler coupling , spindle  bearing   NSK  ABEC 7  higest precision .

step pulse lined up, I cut out all the time the same part size  40mm x 40mm  and  hole in the middle for the Bearing 30mm

turned out of the 5 is most similar to the dimensions I turned out the same rates of speed  no more like 450mm/m if I changed these 2 setup , the machine even more errors

I wrote about the spindle only because end mill is 60mm long , if it is more than 25 mm on the outside form the  spindle , on the same setup 5 for step-pulse and speed 450 mm / m  My part was was bigger , other dimensions it means the end mill bends to side ,I have a backlash on the spindle 0.01mm
the problem is not with the backlash on the spindle , the problem is with the end mill

My pc is dell

I do not know if you think about it  on-board graphics  (intel  82865G)

I have a mach 3 is R2.58

SOFTWARE  RHINO 4.0 AND RHINO2.0

I checked yesterday backlash on the ballscrew  on Y axis  is 0.01mm  and on X 0.017mm

cnc driver  is gecko540

STEPPERS MOTOR  on 3 axis
Step Angle: 1.8  +/- 5% / Step
Voltage: 4.2 V
Current: 3.5A/Phase
Resistance: 1.2 +/- 10% Ohms/Phase
Inductance:  6.4 +/- 20% mH/Phase
Holding Torque: 440 N.cm or 620 oz/in.
Insulation Class: B
Lead Style:  FF46/0.5
Flange Size: NEMA23




I changed everything to fix my machine precision Y and X axis I can move with one finger.  This gave me a better precision
« Last Edit: October 10, 2011, 11:04:27 AM by komar1970 »
Re: gecko540 problem under mach3
« Reply #38 on: October 10, 2011, 11:07:53 AM »
I am very please about forbearance, I have a problem with English. and this is the biggest problem

Offline BR549

*
  •  6,886 6,886
    • View Profile
Re: gecko540 problem under mach3
« Reply #39 on: October 10, 2011, 01:54:19 PM »
OK simple test. Set up a test block on the table touch off on the block and then set axis 0. Command a move of 100.00mm. Measure how far it actually moved.  measure to the same tolerance as the move .00mm.

What were the results? I have NEVER seen a Gecko/stepper move out of tolerance IF it was installed correctly. I HAVE seen MANY machines that could not hold tolerance on a bet. AND we are talking an SX3 (;-)


(;-) TP