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Messages - osman100

Pages: 1 2 3 4 »
1
General Mach Discussion / Re: step error
« on: May 17, 2009, 09:25:31 AM »
thanks a lot
can u help me for the accurate and best way for home switch r it limit or proximity switch or photocell or other

2
General Mach Discussion / Re: step error
« on: May 13, 2009, 12:01:10 PM »
dear hood
today i check and i found it 0.2 mm but I'm in need some time to adjust back lash and some parameter on inverter i think after this fine tuning the accuracy will be 0.02 mm but let me try and tell you the result

3
General Mach Discussion / Re: step error
« on: May 12, 2009, 03:36:04 PM »
actually now it's less than 1 mm  but the acuirte value I'll cheek tomorrow and tell u because today i chick the value with caliber 1 mm only

4
General Mach Discussion / Re: step error
« on: May 12, 2009, 12:49:49 PM »
dear all
thanks for your help and I'm sorry for long time to contact you but rely I'm busy to adjust my machine with this type of inverter . it isn't easy but by the the end and after long fitting today i just finish to adjust x axis and I'm rely succeed 100 % INSHAA' ALLAH
as i told u before now it's work as servo but to reach this that's very important point
1- make motor tuning to adjust motor with encoder and inverter and this tuning should be running tuning
2-adjust pg parmeter
3- adjuster ASR parmeter to adjust feedback from encoder
4-use mode v/f with pg feedback
5- adjust v/f curve and parmeter
thanks for all

5
General Mach Discussion / Re: step error
« on: April 17, 2009, 03:10:12 PM »
even if this according to mach3 manual i can do through speed control chapter 4 page 4-12 pwm control as follow
3. PWM motor control
As an alternative to Step and Direction control, Mach3 will output a pulse width modulated
signal whose duty cycle is the percentage of full speed that you require. You could, for
example, convert the duty cycle of the signal to a voltage ( PWM signal on for 0% of time
gives 0 volts 50% gives 5 volts and 100% gives 10 volts) and use this to control an
induction motor with a variable frequency inverter drive
. Alternatively the PWM signal
could be used to trigger a triac in a simple DC speed controller.
Figures 4.12 and 4.13
show the pulse width at
approximately 20% of
the cycle and 50% of the
cycle.
In order for the PWM
spindle speed signal to be
turned into direct current
(actually a direct voltage
is generally used as the input to variable speed drives, but you know what we mean) the
pulse signal it must transformed. In essence a circuit is used to find the average of the pulse
width modulated signal.
The circuit can be a
simple capacitor and
resistor or be much more
complex depending (a)
on how linear you want
the relationship between
the width and the final
output voltage and (b) on
the speed of response
you need to the changing pulse width.

6
General Mach Discussion / Re: step error
« on: April 17, 2009, 11:33:59 AM »
dear hood this card can use a closed loop but i use it as v/f with pg and this make it work like servo to do that i set parameter a1-02 to 1 see pages 4-5,4-7,4-14,5-8 also parameter from f1-0 t0 f1-14 is to adjust pg page 5=36,5-37 and this also like mach 3 parameter
and the most important is puls train i/o parameters fro h6-0 to h6-7 page 5-51
page 6-30 it explain how puls train work 
so that by the end this inverter is controlling after this adjustment according puls train when we set the puls train reference for example 25khz equivalent to motor freq. 5o hz so if the freq. in from mach 3 is changed the speed will change because the freq. will  change the output freq. but the priod will be the same
all the best

7
General Mach Discussion / Re: step error
« on: April 16, 2009, 10:16:11 AM »
u r right if i use it as fvd without pg-b2 option card but with this card it work like a servo and with more power than stepper or servo

8
General Mach Discussion / Re: step error
« on: April 16, 2009, 09:15:46 AM »
dear hood
with this inverter  (drive) i can use induction motor ac servo motor with high accuracy u can download manual from this link
http://industrial.omron.eu/en/products/catalogue/motion_and_drives/frequency_inverters/lifts_and_cranes/f7/default.html#productinfo13_1

9
General Mach Discussion / Re: step error
« on: April 16, 2009, 07:20:08 AM »
the motor is induction motor 1.1 kw with encoder 800 p/rev and the driver is omron f7 and the reduction is gearbox 1:40 then a reduction 2 gears 1:1.5 so that's mean the total reduction gear is  1:65  then i use a pinion and rack with pitch 6.2 mm

10
General Mach Discussion / Re: step error
« on: April 16, 2009, 05:31:10 AM »
also that's other files

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