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Messages - RICH

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4521
Quote
Is anyone that can do anything reading this?

The answer is in the pic!  ;D  ;D  ;D  ;D

4522
General Mach Discussion / Re: Turn + Threading problems
« on: June 29, 2010, 09:49:19 PM »
Link didn't work Hood and i tried a diffferent one and it didn't work.
So.......Under the Artsoft logo above:

Support>Tutorial Videos>FTP
( "FTP" IS ON THE SECOND LINE, CLICK ON IT)
Click on the "Directory MACH" and you will find older versions listed there that can be downloaded.

Takes a little longer but you get there!  ;)
RICH

4523
LazyCam (Beta) / Re: Opening LC in Mach3
« on: June 29, 2010, 09:45:39 PM »
Don't know what to say and just think it's the graphics card or maybe some setting. I don't use Windows 7.
Sorry ...
RICH

4524
LazyCam (Beta) / Re: Opening LC in Mach3
« on: June 29, 2010, 04:00:10 PM »
What happens if you click the X in the upper right corner to close the properties bar ( you can just go back to View button and to get it back)?
 Will you then see the graphics area along with the tools on the right side of that window in LC?
If that is the case you have the properties bar stretched over the graphics area .

RICH

4525
General Mach Discussion / Re: master cam to mach3 turn
« on: June 28, 2010, 09:53:17 PM »
Hmm....
You just shook the memory here, i don't use MasterCam, but Dolphin has a few different post processors for the
lathe, ie one for radius and one for diameter.  So may be similar. Additionaly check if there is a turning mode that you can be in
when bringing in the file as that could just be a click and you may have mistakenly done it.

FWIW,
RICH

4526
General Mach Discussion / Re: Turn + Threading problems
« on: June 28, 2010, 05:03:30 PM »
 DAlgie,
I don't go back to V1.84 so can't relate to that.
A lot of effort was done to correct the pitch, feedrate, etc in threading.
There is a chart in the write up which gives allowable error as compared to pitch and that was the basis for how accurate the threading should turn out.
Most of the testing i did was with 2" lengths ( becuase i could more easily measure that length with the microscope) but i did tests
out to 4 or 6" and had no problems with the results.

I am still using 3.042.033 ( don't use anything lower than that version ). I don't remember any problems reported since then .
Let us know how you make out.

RICH

 

4527
General Mach Discussion / Re: stepper or drive problem
« on: June 28, 2010, 10:32:14 AM »
Simply put, if no heat is generated from the motor, then your not working them very hard.
If you can hold them, your below 140 deg F and that's what i go by. The winding insulator has a max rating and
some will state a max temperature rise. Don't mean a hoot if you find that the stepper is acting funny due to
it's temperture. Seems like, here anyway, that the old style can types as compared to the hybrid type are not as sensitive
to the heat, but that may just be a figment of my imagination. Just use common sense.
RICH

4528
General Mach Discussion / Re: stepper or drive problem
« on: June 28, 2010, 08:38:23 AM »
Quote
It is extremely difficult to re-zero after a rough and get it exact


Even though you don't have limit switches you could create a work offset and have a home position. So after the rough you would be able to
go home, change or set the finish tool. Then do the finish pass.

RICH

4529
Question, how are you porting the block for oil passages?
 That's  the one thing the guy that did the roules Royce airplane engine would not divulge.
Is a car in the planning? >:D

RICH

4530
General Mach Discussion / Re: stepper or drive problem
« on: June 27, 2010, 03:29:28 PM »
Quote
How did you know this and what effect does that have on losing steps as I am not "to the limit"?

- Just experience Rick ;), could be wrong ;D and testing to find what i can do with my  machines such that they will be reliable when i machine something.
You only need to have things go wrong once......when you have invested a lot of time into something.......to convince yourself that speed
alone is not the only consideration.

For a stepper, the torque will decrease as rpm increases. So if you don't have some "headroom" ie; running at velocity and accel below the max, you will stall the motor / skip steps. SO,  should a machining operation,  or maybe lubrication / gib adjustment or anything change and require more power, you can end up with a problem.

Power is basically speed x torque and there is a point on the motor curve ( some value of pulses per second / rpm and torque ) where
you will have the most power available. Power is what you want not necessarily speed, but, you can rationalize that depending on what you are doing.

There is something called exact stop and constant velocity and acceleration can become important. Have a read of the manual or search 
for more info. When i do engraving work i use exact stop at a reduced feedrate to make sure  the steppers won't skip. The last thing i want to
have happen, on some finished part which i invested 15 hours into, because i am trying to save some minutes from an hour of machine time.

RICH









 

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