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Messages - RICH

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3471
FAQs / Re: direct input commands in mach 3 mill
« on: July 05, 2011, 07:37:54 PM »
There are tracking programs available which provide stepper movement of the telescope ( not sure about the focus though). Been ages since i read about it and long time ago used a program that would allow my beam to track satellites for ham radio use. Not remembering all that stuff anymore........ ;)

You could use and XBOX 360 to manipulate the telescope via the steppers.... just a simple thought ???

RICH

3472
General Mach Discussion / Re: Is backlash compensation broken?
« on: July 05, 2011, 07:22:16 PM »
I am using version 3.042.033 and know for a fact that there is no problem in that version here.
Backlash settings that were used:
- 50% of max speed
- 0.005 Shuttle Acceleration
- Debounce interval 500

Can you post your xml file?
Do you have any break out boards, using the PP, etc?

You may want to try a slower percent, Shuttle Acceleration of say .010 of even .05 so you can watch the backlash get implemented at a snails pace.
Testing my memory as i don't use BC anymore...... ;)

RICH

 

3473
General Mach Discussion / Re: Is backlash compensation broken?
« on: July 04, 2011, 04:34:32 PM »
Backlash is implemented when a change in direction takes place.
You should initially remove any backlash by jogging a short distance in one direction before reversing the direction.
I don't remember anything wrong with BC in V3.043.022.
RICH

3474
General Mach Discussion / Re: motor temp
« on: July 03, 2011, 06:29:37 AM »
Quote
is this where i would set the velocity
 
Yes, it's somewhat trial and error, you set the velocity for say 10ipm, try, and then keep doubling it until you find where it skips.
At that point reduce max velocity by about 30 to 40 %. Now try different acceleration values ie; if max was 50ipm try 5 for accel and then increase until you find where it skips reduce that by say 30%. The 30% below the max leaves some head room for machining etc. Experience on what you are doing will  find what you need to refine the settings to.

Quote
good starting point on settings for speed and feeds
I don't do any cnc woodworking, but, setting a feed rate at the equivalent of what you would do manually with a router for desired result would be a good starting point.
 Some of the exotic hardwoods sort of machine like  metal....and don't cut the rock in Ebony ....... ;D
Surely the router folks in here can give you better guidance.

RICH

3475
General Mach Discussion / Re: motor temp
« on: July 02, 2011, 08:17:18 AM »
Quote
is it normal for one motor to run warmer than the other  is there normal opeating temp


Each motor temperature could be different ie; depends on the driver amp setting / wiring method for a motor, just how much work it is doing, and also the ambient temperature.
Max motor temp is based on the winding insulation and the manufacturer states what that is or recommends the max amp at a voltage.
My general rule of thumb for steppers ..... if it's too hot to hold your hand on a motor after running for some time ( which would be around 140 degrees F) change you drive amp setting.
You can get burnt at 140F.  A stepper can start to behave rather wierd if it gets too hot.
As far as time goes , I have left mine engaged for say 12 hours and they didn't get hot, i have run steppers for 6 hours constant and they were at around 130 deg F with no problems, yet
I have also run them for about 1 hour and they started missing steps, sounding differently, etc.  Different steppers ....different temperatures.
Since i have a number of different machines which all use the same controller / drivers  a switch box is used allowing me to choose a resistor which changes the driver amp setting.

If you look at a motor curve, which shows torque to rpm at some voltage, the ideal would be to have the amp setting such that you get the max power  ( speed x torque ) from the motor.
Above and below that power point is something only you can determine based on desired motor application.

Quote
feeds and speeds  are way slow

Not considering the mechanical side of your system.........
The feedrate is limited by your max velocity which will llimit your rapid move. The motor rpm can be limited by the amp or voltage being supplied.
 An extreme example of this is a low amp setting and the motor won't even turn when pulsed.

Hope the above is helpfull,
RICH
 


 

3476
Glad you got it working and sharing what you found. It's shurely an odd one.
RICH

3477
Attach your xml file to a reply. You will find it in the directory where you installed Mach.
Someone will be with you shortly to assist....... :)
RICH

3478
General Mach Discussion / Re: Incorrect Router Repositioning
« on: July 01, 2011, 07:39:29 AM »
I see in the GCode an M6 at the start ....Why was it there in the first place?
Have a look at CamBam settings or post processor since you are telling  CamBam that you want to change tools.  Ignoring the tool change via Mach settings cancells the
M6 command when Mach runs the program. Note that routers can generate a lot of interference and just turnign it on can create a condition to miss steps in additon to incorrect
velocity or acceleration settings.

RICH

3479
General Mach Discussion / x axis problems
« on: July 01, 2011, 07:22:06 AM »
We ask to post an xml file because it quickly provides a way  for someone to see how you configured the machine and in general your settings
without asking a lot of questions. That minimizes the time we have to spend in addressing someones problem by eliminating some possibilies  along with asking more direct
questions tailored to the problem. So if a user can make our job easier in helping the user it would be appreciated.

Quote
I think the whole pirated thing is a red herring FWIW.
Think as you wish but the pirated thing is real, can create problems, and can be a royal PITA. Personaly,nothing worse then spending  a lot of time trying to help someone with a problem, a problem that shouldn't exist in the first place, and is due to some horses ask who has no respect for anothers time, effort, and consideration.

RICH

3480
General Mach Discussion / Re: Spindle RPM lock error while threading
« on: June 30, 2011, 05:34:09 PM »
Quote
looks like a high value in the CV setting makes it withdraw the tool early to try and keep a constant velocity
Not sure how CV interacts, if any, with the set feed rate of the thread cycle ....Art would need to comment...

Quote
displayed actual RPM in version  R3.043.022 being wrong above 600 RPM seems valid as it was fixed as soon as I installed Version R2.63
No comment on the old versions, they are history in my book, just let the old dogs quit hunting.......  ;)
RICH




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