Messages

21

General Mach Discussion / synchronize flow rates and motor speed

« on: June 19, 2008, 02:20:13 PM »

Hi!
Is that possible to synchronize flow rates of a motor driven pump and XY axis travel speed.
The viscotec claims that.

http://www.viscotec.de/pdf-dateien/Englisch/brochure-adhesives-and-sealants.pdf   (page 6) (see also page 5)

"The ViscoTec dispenser is the obvious choice when precise, fully
automatic and reliable dosing is required. This is not just because
it is suitable for all types of adhesives and sealants, but also because
quantity and speed are so simple to programme ? a feature
greatly appreciated by many users. It is so easy to adjust the
dosing quantity to the travel speed of the robot. If, for example,
the robot travels more slowly in a curve than on the straight
line, the speed of the dispenser is slowed down accordingly. Spot
dosing that can vary in quantity from spot to spot presents no
problem either."

is that possible to set-up a 4th stepper motor to do that?
thanx!!!!
George!
 

22

Show"N"Tell ( Your Machines) / Parker OEM750 stepper and mach3

« on: February 10, 2008, 06:08:21 AM »

Hi.!
can you help me please?
If you see the wiring diagram (OEM750 Inputs and Outputs (page 29 from 100)
http://www.compumotor.com/manuals/OE...tire_Rev_B.pdf
can you tell me if this drive will work with Mach 3 ??

If yes can you tell me the wiring?
thanks a lot!

George!

23

Show"N"Tell ( Your Machines) / Re: My Cnc project (Parker linear tables)

« on: December 18, 2007, 11:11:03 AM »

I have some progress with XY mounting.
I take 2 alluminium pieces set with Clamping fixtures from a Compact Modules CKK (Star rexroth)
 

The 4 holes have 126mm distance so I have to drill a new ones with 168mm distance.!

>>>  

i have also drill aditional holes to mount the alluminium to my parker table.!

          

The result is a very stable connection!!!

     

Thats all for now.!

24

Show"N"Tell ( Your Machines) / Re: My Cnc project (Parker linear tables)

« on: December 01, 2007, 01:47:33 PM »

My CNC machine is for this application.

http://www.color-dec.com/5060w.htm
http://www.ijfisnar.net/movies.htm

25

Show"N"Tell ( Your Machines) / My Cnc project (Parker linear tables)

« on: December 01, 2007, 12:59:31 PM »

Hi! (sorry for my bad English)
I want to share with you the experience of build my CNC Table..!
Before A year ago I was Design a table made of ready bosch linear tables
( from CKK series)


The Price With alouminium profiles has reached 30.000$.
After a second though and a tax office invation to my money ( I pay about 20.000$ last year) I desided to make a more economical dreams for my CNC table.
I try the ebay.
After 3-4 months of searching and waiting I almost finish and i have allmost all the parts I need to make the dream come true.!

I choose the parker tables from the Series 406XR and 404XR for Z Axis.
(The Coca cola is to see more clear the real Size )
      
 
The cost With Shipping was:
The 2 Y Axis 800mm travel 1400$ (1999 Used) Parker XR406
The 1 X Axis 800mm travel 1200$ (2002 Used) Parker XR406
The 1 Z Axis 150mm Travel 160$ (2003 allmost new) Danaher Ds4
The 1 Z Axis 200mm Travel 180$ (2004 allmost new) Parker XR404

And A Mounting Bracket For YZ 130$

   


I shoot And Few details
X Axis lead 25mm



Y Axis lead 10mm


Unfortunatly Only one Axis come with Nema 34 motor mount to fit with my servo motors. So I have to order a couple for the Y Axis and One for Z axis



I have allready ordered the alluminium frames to connect the linear tables

More photos soon...!
 
 


What do you think..?
Thanks
George

26

General Mach Discussion / Re: Different use of Mach3

« on: October 24, 2006, 02:02:11 AM »

sshneider
This would me 2 valves and some kind of a mixing/impingement  chamber.  Does the dispense valve device you showed us do this?
Personally, I don't see how a stepper motor is going to be anywhay fast enough to control a couple of drops of dispensed resin.  Pnuematically actuated valves (as Hood suggested) is definitely the way to go.

I made a dosometric system for this. I push a button and mix 200ml,  throw it in a tank. the mixed Urethane resine is under presure 1 - 1.5 bar and this Urethane resine has to only one way out The valve. When the  100ml goes to 20ml I push a butoon & I mix another  200ml.

When you have to drop a very small drops like 1/10ml or 1/20 mil the Pnuematically actuated valves is not very percise.

I Will shot the system and I will come back with photos to see....

27

General Mach Discussion / Re: Different use of Mach3

« on: October 23, 2006, 05:28:28 PM »

Thanks Hood...! I will test it as soon as I can.

I feel so alone to this project since my friends (graphic artists) has permanent war with hardware....
Do you bother to share with you (all of you) my process in the machine (with photos) and the G code of course...!

28

General Mach Discussion / Re: Different use of Mach3

« on: October 23, 2006, 04:27:56 PM »

The liquid has a medium to high Viscosity and some times if the needle is too close The liquid don't leave it . So the needle goes to the next  decal with liquid on and destroy the work.
The needle has to be about 2-3mm  from the decal when flow the resine and when it is rised has to take a 10mm safe distance to move to the next.

29

General Mach Discussion / Re: Different use of Mach3

« on: October 23, 2006, 03:53:01 PM »

And another thing
The dispense technology is most for medical applications and the XYZ tables + software are really very expensive...!

The janome 2500N
50cmX50cm with 5-phase stepping motor (not servo) and Portable Weight 6kg

cost about 14.000 EUROS (with software) (17.550$)

30

General Mach Discussion / Re: Different use of Mach3

« on: October 23, 2006, 03:38:45 PM »

The Flow Control In my case has a lot of options

Working With Air presure
1)
1000$
2)
http://www.efd-inc.com/catalogs/EFD-High-Pressure.PDF

These Valves are very expensive! And I dont know the way to control them.

So the Idea is simple

I take this cheap FLOW CONTROL REGULATORS, METAL VERSION (20-25$)



And Convert to this



If I controll the the motor I can control the valve and flow ...

I allready make some tests and works fine.
The problem here  is that In many cases I want to drop Just One Drop and its very difficult to control this open close action with air.
The other problem is that the doming resign has about 15-20min life then is not more a liquid. Imagin the solid resign in the valve of 1rst photo.... ouch!!!!
The FLOW CONTROL REGULATORS is very cheap and I dont care about an accident (somethink like to stop the production for an error etc)

And here is the idea.
Mesure the motor
1000 steps = 2 drops/sec
1500 steps = 3 drops/sec
2000 steps = 5 drop/sec
3000 steps = Continous flow....

Convert the step to move

R1
R2.3
R4.1
Etc
And right this code in the G code programme


And becouse the decals is a patern it is just a copy paste the same move of R.

What do you think?