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Messages - RICH

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5561
Show"N"Tell ( Your Machines) / Re: My TSlot based router...
« on: October 19, 2009, 08:45:28 PM »
Looks like a nice machine. LOL
RICH

5562
LazyCam (Beta) / Re: Drawing into LC and then to Mach
« on: October 19, 2009, 08:41:24 PM »
Dragon,
 You will not find any info on importing a picture into LazyCam in the manual because it is not covered.
There are ways of doing conversions, all of which leave much to be deisired in my opinion.

You can bring the picture into CAD and draw over it and then export the dwg out as a DXF. It's fast amd is
my preferred method. You can also use Copycat ( there is a manual for it in the Members Docs ) and it will generate the Gcode but requires a web camera and a license.

I would stick with tracing it in CAD and exporting it. This way you have full control over the outcome.

RICH

5563
General Mach Discussion / Re: Problems threading on the lathe
« on: October 19, 2009, 07:19:42 PM »
ART,
TEST #3 ATTACHED

RICH

5564
General Mach Discussion / Re: Problems threading on the lathe
« on: October 19, 2009, 07:17:51 PM »
ART,
Three tests for your review. All tests are identical and reports attached for
each. All done with posted version from page 57- reply 568.
402 rpm @ 20 passes / .1p
Note that test #3 was stopped after pass #9.

Test#1   
It was the last two passes that did a heavy cut and i just assumed it was 19 shown in the TEST#1 PIC.That was done wth the unaided eye. I KNEW THaT PASS #8 OR 9 WAS BAD AND THEN 10,11,12,13,14,15,16 AS A GROUP SEEMED OK. BUT THEN 17 & 18 WERE BAD. ( MAY BE OFF IN MY COUNT OF PASSES BUT THAT'S MY NOTES ).

TEST#2
Ths one was monitored under the microsope.

Pass 1 to 8 - looked right on as group

Pass 9 was bad and moved the lead to an increase over 1-8 scribe. As a group 10,11,12,13,14,15 followed in pass 9 scribe.

Pass 16 decreased the lead from from 9-15 scibedline.

Pass #17 inceased / moved the lead back to pass #9

Pass 18 and 19 moved the lead.

SO it oscilated back and forth ( i believe that is what happened in test #1 also ) All within the .0035" total lead error / two scribed lines.

I show all the above summarized in TEST#2 pic.

TEST#3
I figured i would try and catch the bad pass by itself and it looked like
#9.......Could be wrong. No pic but i d have an error report.
Under 40x and a side view you can barely see the .001" deep marks.

--------
I didn;t have a chance to compare the above visual descriptions to the reports but they should be close.
 
RICH

5565
General Mach Discussion / Re: Problems threading on the lathe
« on: October 19, 2009, 12:24:11 AM »
ART,
Will do a few tomorow to get some data.
I don't know about the spindle actualy slowing down.Your cutting air with these tests. The 60 hertz AC is rather highly regulated to the motor. The only thing, motor / pulley / belt / pulley/ belt tensioner / gears as a "system " may change but it would be repetative in one revolution. What ever that varience, would be quite small and the sensor if acting repetatively, probably wouldn't pick it up. Or with my driends instrument, you know your measuring the system, but have no clue as to which component .

What bugs me is the occurance of the screwy passes. They "seem" to be patterned somewhat. If 40 passes are done, then keep your eyes around pass 15-20 to get a bad and then 30 and finaly towards the last 38-40.
So it's in terms of threading cycles 20-10-10. Reduce the passes to 20 and it looks like 10-5-5. The real bitch is you can't "see" it by dry running.

I didn't try it opticaly. I need that G4 pause in there to take a measurment. Need to play with that some as that would allow a lot of testing and save a lot of time. Figured i could do the subroutine, put a dwell in to mimic the time, and see if i can catch bad passes. That was part of test #1, since at one time, you couldn't put a G4 into a threading cycle.

My question is, using that subroutine, is it an apple and not an orange relative to doing the scribing via code out of the wizard?

RICH
 
 

5566
General Mach Discussion / Re: Homing problems y axis won't stop running
« on: October 18, 2009, 10:24:57 PM »
Dave,
I haven't read what i posted in months. and don't remember which version i was using then.
Do you have Soft Limits on?
BTW, I don't have limit switches on my mill, not that i recomend not having them, i just never installed them.
Frankly,  i found using the homing without limit swithes to be a PITA for what i do on the mill!
RICH

5567
SmoothStepper USB / Re: Which BOB for the smooth stepper
« on: October 18, 2009, 10:16:01 PM »
Yes, on the warp9 site. I just asked for an update about it recently.
RICH

5568
General Mach Discussion / Re: A few questions about running
« on: October 18, 2009, 09:54:53 PM »
?1 - Yep, just create a seperate XMl / profile for the mill. I don't use Vcarve but there are folks in here that do.

?2 - For the lathe you can use LazyCam but will need the pro license to have the advanced features. Currently in development is LazyTurn which will be a nice program once the finishing pass is implemented. The LazyCam license will cover LazyTurn. There is a manaul in the Members Docs for both of them.

Now if you don't care for those, then save your dollars for high end programs for the lathe. There is not that much out there for the Lathe.

RICH

5569
Show"N"Tell ( Your Machines) / Re: 13x40 lathe conversion
« on: October 18, 2009, 09:39:14 PM »
As long as you have a rack in the back window for the 12 GA sawed off shotgun.
Like they used to say in the boonies of Tennessee, "She's sittin there in case you need to shed some daylight"
but in the mean time "Think I 'll just watch the nail in the tree rust some".   ;)

RICH

5570
General Mach Discussion / Re: Problems threading on the lathe
« on: October 18, 2009, 09:23:53 PM »
ART,
All tests V.028  per posted MachSpindleOct16 on  page 55 - reply 559.
--------------------
Test #1 was out of curiosity doing a thread test at 404 rpm using the following code:
M98 P0001 L20
M30
O0001
G32 Z-1.9 F.1
G4 P2
G01 X.1
G01 Z0.0
G01 X0.0
G4 P2
M99
M30

So i just did 20 looped passes. Pass #6 and #17 were bad, and the lead increse was .003" / inch.
--------------------
Test #2 used code from the wizard.
404rpm/ .1P / 20 passes@.0002"
Pass #14,19 & 20 were visualy observed as bad. I have attached a file which icludes the report for test #2 and test #3.The first pass had a decrease in lead of .0008" /1"  and .001" /  1.4" inch. Then there was a correction after pass#1 and pass #14, 19, & 20 were bad visualy and changed the lead to a increase, namely .0035" / inch.
Picture TEST#2 shows the passes at 1.4" along the scribing.
----------------------
Test #3 was the same as test #2.....EXCEPT..... I decided to try correctng the pitch and see what would happen.
So instead of a .1P ,  the modified pitch used  was 0.09965 ..... (0.1000 - .00035=.09965 ). So the first 13 passes
showed a decreased lead of 0.001". Pass #14, 19, & 20 were bad and cause an increase in pitch.
This is shown in picture TEST#3.

Picture TEST#3MAG shows a maginfied view at the 1" point of scribing.

---------------------

SO three different tests and all had a common .0035" total "range" of lead error. I could shift the location of the error relative to a perfect pitch. Note also that each test had a screwy pass all occuring at around pass #14 or #19 or so. Those screwy passes al seem rather close to what happened n other tests. In the other test that went to 40 passes they seem to occur around pass #15,30,and near  40.

--------------------
BTW: I did one additional test. I hate to compare apples and oranges.....but for info ......... It was manualy done on my 30 to 40 year old Rockwell 11" MANUAL lathe. Pitch was .1 @ 10 passes and the change in lead was 0.0003" in 2" of scribing, no variance between lines, single scribed line. Hmm....
all those old belts and pulleys /gears / gearbox, lead screw, half nuts and 23 times more accurate than my CNC lathe!

RICH

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