Hello Guest it is March 28, 2024, 12:43:30 PM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - komar1970

Pages: « 1 2 3 4 5 6 7 8 9 10 11 12 »
51
General Mach Discussion / Re: gecko540 problem under mach3
« on: October 10, 2011, 02:49:44 PM »
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
Hi Komar,

0.06mm is a fairly small error which can be a result of the machine stiffness /  feed / rpm / cutter condition.

Does your program have a roughing pass, then a finishing pass (maybe several finish passes) and then a spring pass?
For an accurate 30.0mm bore I'd normally rough out to within 0.25mm, take 2 finishing passes at 0.125 each and then a following spring pass.
To take into account cutter wear, flex of the machine and tool holder, you'd also need to have cutter compensation to adjust the finished size.

I had a quick look through the old posts of this thread and can't see any details of the material / thickness  / type of cutter you are using.

ATB
Derek






ALUMINIUM TOOLING PLATE  3/4 END MILL CARBIDE

52
General Mach Discussion / Re: gecko540 problem under mach3
« on: October 10, 2011, 02:41:11 PM »
block is about 3''is a 76.2mm I told the machine to go the distance 76.2 machine is not reached at this distance

I had to move manually it about 0.51 more, that indicator showed me a zero

53
General Mach Discussion / Re: gecko540 problem under mach3
« on: October 10, 2011, 02:15:32 PM »
 have a 3'' blocks each

54
General Mach Discussion / Re: gecko540 problem under mach3
« 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

55
General Mach Discussion / Re: gecko540 problem under mach3
« 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

56
General Mach Discussion / Re: gecko540 problem under mach3
« 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

57
General Mach Discussion / Re: gecko540 problem under mach3
« 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

58
General Mach Discussion / Re: gecko540 problem under mach3
« on: October 10, 2011, 12:33:07 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

59
General Mach Discussion / Re: gecko540 problem under mach3
« on: October 10, 2011, 12:18:48 AM »
file from me gecko

60
General Mach Discussion / Re: gecko540 problem under mach3
« on: October 10, 2011, 12:13:25 AM »
next

Pages: « 1 2 3 4 5 6 7 8 9 10 11 12 »