Messages

161

General Mach Discussion / Re: What Steps/ Units Settings for Z-axis (Quill) of CNC Retrofitted Radial Machine?

« on: May 21, 2010, 09:35:45 AM »

Yes I clearly understood your previous post for changing the Unit to INCH in MACH3 and try recalibration....I will try that too..but logically, it will have no effect on the setup... This is because whatever steps/unit i calculated in 'MM" mode, Mach3 will simply multiply them into 25.4 to get in 'INCH' mode...

Regards and thanks for your valuable time...

162

General Mach Discussion / Re: What Steps/ Units Settings for Z-axis (Quill) of CNC Retrofitted Radial Machine?

« on: May 21, 2010, 09:29:52 AM »

Manmardam.. currently what Steps/Unit you have kept for Z-axis in Mach3?.. and do you have snaps to share... Again thanks for the quick reply

163

General Mach Discussion / Re: What Steps/ Units Settings for Z-axis (Quill) of CNC Retrofitted Radial Machine?

« on: May 21, 2010, 09:18:09 AM »

RICH:)
Thanks for informations... I will certainly drive the Pinion and see how much the quill goes down with one revolution.... I discussed with one of my friend about his drill and he said that with one revolution of drill-arm, the quill goes down about 4 inches... I will check with my drill, if this is the case then the steps may be very Coarse...

MANMARDAM...
Thank you for the information... I understand what you means to change the Units...If the unit set in 'INCH' then it may be by simple math (1200 steps/INCH).. Do you belive this will solve the problem?.. I really want to know what problem you were facing?... and How much this problem was resolved at your end?.... Please help me providing more information about your experience...
thanks

IAN:)
Thank you for the response...but if lets suppose the One turn of Pinion drive the Rack down to 5inches..then this will be coarse or fine?


TO ALL:)
I am still puzzling about Turning the UNIT from 'MM" to 'INCHES'.. How does this problem can be resolved by changing the UNIT?

Best Regards and waiting for yours response SIR.


PS:
to find the Pinion-Rack ratio or travel:
200 x 2 x 3 x Y= 12.344
Y=0.010286666666666666666666666666667  What does this means???

164

General Mach Discussion / What Steps/ Units Settings for Z-axis (Quill) of CNC Retrofitted Radial Machine?

« on: May 21, 2010, 07:14:59 AM »

See my following thread, I have converted the Radial Drill and now tweaking the controls..
http://www.cnczone.com/forums/showthread.php?threadid=105247
I have used Ball screw and i have backlash compensation enabled in Mach3 due to some backlash in those screws... Now I am getting 0.009mm accuracy and repeatability..

Currently I am getting problems in calibrating the Z-axes... When I using Mach3 to setup it in 'MM' metric mode..I am getting 12.344 steps/mm... This is very coarse I don't know why?

My Motor is = 200 steps
Gear Reduction 3: 1 attached to QUILL mechanism
I am using 1/2 step mode...
I don't know what is driving the quill but it is something Rack and pinion, i don't know the specification..

so the mathshould be simple...
200 x 2 x 3 x Y= 1200 x Y. (Where 'Y' is the Quill rack and pinion I don't have informations about)
but Mach3 only returning me 12.33 steps!!!!!

What should i do?

165

General Mach Discussion / Re: Machine goes crazy

« on: May 16, 2010, 07:39:42 AM »

It seems that Code is right but your z-axis DIR pin setting is reversed...Just Set the Direction Pin Active High if its Active Low in Mach3..

Normally in Gcode, the Z-axes goes up first at safeZ and then goes down.. In your case it goes down and making all the code as Mold..

166

General Mach Discussion / Re: Need Guru input on an idea: Using Mach as dynamic balancer

« on: May 16, 2010, 07:36:12 AM »

Hi,
I am also looking for the solution..We had a manual balancing machine for compressor/Turbines rotar etc.. I also want to make one with Mach3.. Will closely watch this thread...

167

General Mach Discussion / Re: What is The Problem in this Code?

« on: April 10, 2010, 03:34:21 PM »

You have Z with 1:1 pulley.
When you move 10units your wheel turns 1 rev. You have an accel of 400units/s^2

Since for v0=0 you have z(t) = 1/2 a*t^2 , solving for t

t= Sqrt (z(t) * 2 / a) = Sqrt (10units * 2 / 400units/s^2) = 0.223 seconds

So if im not wrong you are trying to complete a full revolution from steady state in 0.22 seconds.

Are you sure your motor is not loosing steps?

Sorry .. I have to minimise the acceleration..Say 100 and velocity to 600.. and will try it.. Actually the Stepper has almost no load.. the sewing machine wheel is removed and have no inertia at all.. I attached the Stepper and Machine shaft with 1:1 teeth belt pully..
Regards

168

General Mach Discussion / Re: What is The Problem in this Code?

« on: April 10, 2010, 01:44:40 PM »

I tried it and it works fine in my machine as it is.
Has to be something related to configuration

Hi elpablito:)
Did you change the steps/unit ?.. Any help by posting screenshot of configuration?

169

General Mach Discussion / What is The Problem in this Code?

« on: April 10, 2010, 12:34:56 PM »

Hi,
I am working on CNC embroidery machine.. Following is the Machine specifications in Mach3

1- X-axis step/ unit = 244.34   Velocity=200 and acceleration= 50
2- Y-axis same as above
3- Z-axis step/unit 40 velocity=1000 and acceleration=400

Now the Z-stepper is connected with sewing machine wheel with 1:1 ratio pully. The z-axis motor is 200 steps/revolution and controller is set to 1/2 step. Total steps/unit 400... Now i kept for Z-axis 40 steps/unit so that for each 10mm linear move one revolution completes.

My embroidery software generate following Gcode.

G90
G21
G64
F 2000
(NEEDLE UP RAPID MOVE- Light bulb Off if On)
M09
G00 X-0.1 Y0 Z2
G00 X9 Y2.6 Z2
(START STITCHING- Light Bulb Off if On)
M09
G00 X17.2 Y1.1 Z2
G00 Z8
M786
G00 X25.3 Y-0.2 Z2
G00 Z8
M786
G00 X26.1 Y-0.3 Z2
G00 Z8
M786


Where M786 is Macro and the purpose of this to setOEMDRO (802,0) i.e. After each Z-move Z-axis DRO becomes zero.

THE PROBLEM:
My X/Y moves running very well but my Z-stepper moves very little about 10 degrees only.. I don't know why this happening?... When i do not load Gcode in Mach3 and run the Z-motor through MDI typing G00 Z10 then stepper completes one Full revolution.. but when i load above Gcode the Z-axis DRO contineously changing and zeroing and the motor runs very slow upto 10 degrees after each X/Y moves..

Please help me:(
Regards


PS:
the M786.m1s macro only include following line
SETOEMDRO(802,0)
and this macro is kept in Mach3 macro folder and running like a charm.

Following is some embroidery carried out by my friend RENE using my software
www.my-woodcarving.blogspot.com

170

General Mach Discussion / Re: Mach Controlled DIY embroidery Machine

« on: January 20, 2010, 12:52:33 AM »

Yesterday installed the carriage and repair and tested the controller cards..