Messages

11

General Mach Discussion / peck drilling lazycam

« on: December 17, 2010, 10:28:08 PM »

Does the peck drilling feature in lazycam work.  I'm having touble getting it to g83..when I post the to mach3 it show up as g81.

Thanks
Steve

12

General Mach Discussion / Re: Random Loss of Position

« on: December 07, 2010, 10:21:39 PM »

Well it ran great again all day today .  I'm cutting grooves in aluminum.  My feed rate is set at 55 ipm and my program is about a hour long.  So theres plenty of time for it to screw up..   I'd like to turn up my feed rate and see what happens.  Maybe I'll get brave tomorrow. 

Hood, its set at 25000 Hz

Thanks again for all the input.

13

General Mach Discussion / Re: Random Loss of Position

« on: December 06, 2010, 11:21:11 PM »

Yes it's close,

On the motor tuning and set up page there a setting for "step pulse" 1-5  and  "dir" 0-5.   Out of desperation I decided to tweek the "step pulse".  Mine was originally set to "0" I changed it to 1.   My problem hasn't re-occurred since I changed it.  What might have I done?   Keeping my fingers crossed...

14

General Mach Discussion / Re: Random Loss of Position

« on: December 06, 2010, 02:24:54 PM »

So when it counts down to "Mach 3 taking over"  and you see a initial spike then clean after a second or two.  is that ok?

15

General Mach Discussion / Re: Random Loss of Position

« on: December 06, 2010, 02:12:55 PM »

iF it were a limit switch activating it would stop mach as a limit trip. Check the mach driver test and look for something causing a pause in mach.

Just a thought(;-) TP

Well now it pauses in The Y axis as well.  I ran the driver test.  The first time I ran it it said pulse too slow in Red. is that normal?  Is there some where where I can read or find information on how to use the driver test?  I'm really not even sure of what the driver test is doing.

Steve

16

General Mach Discussion / Re: Random Loss of Position

« on: December 05, 2010, 08:23:37 PM »

Well,

I disconnected the limit switch and it ran flawlessly all day. 

When I set up the machine I didn't use the blue limit switch s in my set up since my machine was already set up with mechanical switches.    I did notice when I disconected the wires at the breakout board one seem like it might have been loose.  I should have been a little more careful because that might have been the culprit.

Anyway
Thanks Everyone!

17

General Mach Discussion / Re: Random Loss of Position

« on: December 05, 2010, 12:18:03 PM »

Check your sensor, I just retrofitted a machine with these and had a bad one.
If they are NPN NO type, you should have 12v open (24V supply) and <1volt closed.
The voltage should not wander,(my bad one wandered between 2v - 4v open)
please not that the light on mine worked right, but I had random events.
You can get these on Ebay for about $8, direct from China.

I,m not quite sure what you mean by sensor. 

18

General Mach Discussion / Random Loss of Position

« on: December 04, 2010, 02:26:29 PM »

So,  First of all,  Hi everyone!

Green Horn Here.

 I just finished a retrofit of a Anilam knee mill.

 I used the  4 axix AC servo Kit from Dmm Technologies.  

Peak 7.2Nm(1015 OZ-In) high torque AC servo motor, 3 Axis CNC kit for MACH3

Here's some specs:
- 3 x Peak 7.2Nm(1015 Oz-In), rated 2.9Nm(408 Oz-In), Peak power 900W, AC servo motors
- 3 x Dyn2-H AC servo drives for very smooth,quiet,very high efficient driving
- 1 x DMB4250-8B breakout board, fully buffered Opto-isolated I/O, isolated PWM analog output
for spindle speed control,and charge pump. Hardware generated X secondary X' for CNC Gantry with
jump selectable motor turning direction.
- 1 x 6ft DB25 parallel port cable
- 1 x 6ft USB cable
- 2 x 120 or 220Vac input, 350w,+48Vdc, 7.3A output DC power supply
- 3 x 1ft cables between breakout board and drives
- 3 x 10ft differential signal encoder extension cable
- 3 x inductive, non contact , LED indicated proximity Home/Limit Switches
- 1 x Emergency STOP Switch
- Necessary Cables, DMM software for tune up servo

http://www.dmm-tech.com/Products.html

I have everything working good....Except one glitch... Randomly on long runs when the x axis is traversing it will stall or freeze for a 1/4 second or so, suddenly and abruptly. When it continues its motion  it causes the axis to loose its position.  I've checked the PC to make sure nothing is running in the back ground.  I've changed the driver.  I've checked for loose wires.  I don't know where to go from here so any help will greatly be appreciated.

Thanks
Steve

19

Mach4 General Discussion / Re: New people welcome !! Come in here and introduce your self!

« on: December 04, 2010, 12:37:16 PM »

Hey All

I just got threw doing a retro fit on a Anilam CNC knee mill using DMM Technology's 4 axis high torque kit.  A few years ago I made a CNC plasma table and used a Dynatorch retro kit with it.  It came with all the cables and everything.  Prior to that I knew nothing about CNC.  So in short I'm a green horn that love learning stuff.
Mach3 seems to have some things I really need to learn.  And this seems to be the place to do it.

My 1st subject will be will be " radom loss of positon" a clitch I get on long runs where x servo seems to freeze for a 1/4 of a second then continue this results in the loss of my zero location equal to the distance it stalled.   I don't know where to post it

Steve