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 1 
 on: March 28, 2017, 08:14:16 AM 
Started by MICHELDA - Last post by MICHELDA
Hi, when i start the job a 3D toolpath ruff machining, it does the job well, after i restart the 3 d toolpath finishing machining, everything is ok but     the Z axis move over without touching the material at some place. The X and Y axis are ok. So my question is where is my problem. could it be the z axis motor is not proper configuration, could it be the stepdriver, could it be a mach3 problem. I Really thing i am loosing step in Zaxis.   Any suggestion......thks



michel

 2 
 on: March 28, 2017, 08:12:06 AM 
Started by cubby - Last post by cubby
Hi Tweakie!! Nice to be here. Nice Forum you guys have here.
This board is called:  NVUM_SKv1.1 Motion Controller.
I will try to attach a picture of the device.
I certainly appreciate you guys help.
cubs

 3 
 on: March 28, 2017, 07:21:14 AM 
Started by Lefty469 - Last post by Lefty469
Craig, thank you for the reply.  I had apparently been under the misconception that step and direction were two separate signals.  As I managed to successfully make a cable and connect Mach3 to one of the drives, the drive went the opposite direction than what was being called out.  I assume (scary thought, assuming) that pins 23 and 25 are reversed in my cable (now to find my pin extractor).

I can probably get ahold of the drive software, but I'm not sure what, other than parameters, I would need to alter, if at all.  I can access parameters from the display, and the drives have been working fine with regard to the most common settings.

As for the choice between Mach3 and Mach4, the good people at Mach Support were not sure they would, so Mach3 was purely for beta testing.

The original software that came with the machine, WinCNC, has it's own internal controller card (which is where the 5v comes from).  And yes, the limits are wired directly in to the card.

So, all of that being said, my task list moves to the next 2 items;
1) Should I leave the servos as they are with respect to open collector, or should I move to differential mode?  That may be a question for the servo guys, and maybe the correct answer is to leave well enough alone.
2) I need to find spindle motors, within my small budget, that will drive between 400-1000 rpm, and have a minimum of 20 inch pounds of torque at those speeds.  The speeds will most likely be set it and forget it in most cases, and the need for the range (400-1000) is mostly because I'm not sure what will work best.  The existing spindle (just a 90v dc gearmotor) spins at 360, and I'm sure the other axis' could handle ramping up.  The existing spindle motor is going to be replaced by two spindles (already have two vertical axis', but one is empty), and will need to spin at the same speed.  The vertical axis' will drive the spindles, equipped with form taps, down and up in to existing holes.  X and Y will only move when Z and W are  up, out of the part.

Once I have the new drives nailed down, I can begin looking for a controller card, BoB, etc. to move in to the Mach4 software.

I thank you again for your assistance Craig, and hope to hear from you and others with suggestions on my project.

 4 
 on: March 28, 2017, 07:02:57 AM 
Started by davidimurray - Last post by davidimurray
Couldn't find any info in the search so apologises if this has been asked before.

Is it possible to set the speeds for each increment of the outer handwheel rotation. Currently it just seems to be a default %age with each move, but I would like to make it non-line - e.g. 5mm/min, 10, 25,100, 500, 1000

I can see how to change the increment for the inner wheel but not the outer.

Thanks

 5 
 on: March 28, 2017, 04:46:06 AM 
Started by Lefty469 - Last post by joeaverage
Hi,
should have prefaced the above with a welcome to the forum!

Of course now you are in our clutches..... LOL

Craig

 6 
 on: March 28, 2017, 04:43:37 AM 
Started by Lefty469 - Last post by joeaverage
Hi,
I am inexperienced with servos but electronics is my thing and may be able to help or at least ask the right questions.

Most servo drives are programmed usually with software by the servo drive manufacturer. The program parameters are
stored in EEPROM in the drive. I presume that your drives have been configured previously. It may be necessary to get a copy
of the software that you can reconfigure to your requirement. It would certainly be instructive about the capability of your drives
and servos. Given that the servos have worked in this application then you should be OK without it but you may have to make
some shrewd guesses about how it was configured.

The inputs you require particularly are the step pos and step neg. In section 3.2 Internal connection of servo amplifier page 3-9
shows the inputs as opto isolated. Thus if current flows thru the opto LEDs the input will work. While the drive manufacturer
probably intended that 24V be used 5V will probably also work and certainly did with your previous controller.
Pins 1 & 2 need to be connected to the 5V supply of your BOB/motion controller, pin 8 to suitably configured estop/enable pin
on your BOB and pins 23 and 25 to your step pos and step neg pins of your BOB. I am going to presume your motion controller/
BOB can produce step pos/step neg signals. Note they are called different things, CW/CCW, among others by different controller/BOB
manufacturers. While Step/Direction is more common in Mach CW/CCW is well known and widely if not universally supported.
What is not clear is whether your drives are anticipating that the limit and /or home switches are to be hooked direct to the drive
or to the controller. Either would work as far as the servo is concerned but if direct connected to the drive the signals must be
transmitted back to Mach somehow usually via some sort of serial comms.

That only pins 1,2,8,23 and 25 had previously been used would lead you to believe that home and limits were connected to the
controller rather than the drive. I think the advice to try it that way is a good idea. If the servo is not actually installed in the machine
then not having either limits or a home switch will do no harm.

If you decide that the servo PID parameters, fault current, max speed/accel have to be changed  then you will have to get a copy of
the configuration software, no question. With any sort of luck you can use what is currently configured.

What controller and/or BOB are you using? I use an external controller, a Smoothstepper ESS and Homan Designs BOBs.
If you don't have either a controller or BOB then you have some decisions to make. You might also consider using Mach4
rather than Mach3. There is nothing wrong with Mach3 and it has tens of thousands of users but its development has ceased.
Mach4 is suitably complete for milling and routing and features are being added daily by Artsoft and Plugin manufacturers.
If you are going to buy a BOB or BOBs make sure you get ones with LEDs on the outputs, really are a Godsend when setting
up, especially if new to Mach.

Craig

 7 
 on: March 28, 2017, 12:49:29 AM 
Started by cubby - Last post by Tweakie.CNC
Hi Cubs,

Welcome to the forum.

The colors of those jog buttons are fixed and do not change.

Which USB control board are you using ?

Tweakie.

 8 
 on: March 28, 2017, 12:42:18 AM 
Started by 9fingerscnc - Last post by Tweakie.CNC
Hi Larry,

Nice to hear from you again.

There are disadvantages with that particular board...
1) It needs 12-24 volts in order for the EStop (or any other inputs) to work.
2) The EStop switch needs to have 'normally open' contacts (most are 'normally closed' contact).

Perhaps a different breakout board would be the best option ??

Tweakie.

 9 
 on: March 27, 2017, 11:04:27 PM 
Started by agregg - Last post by agregg
I'm new to the forum and mach4.  I'm also an ex Ah Ha! user.  My last Ah Ha! board died and forced a change.   I have Mach4 loaded and have tried to get the license to stick.  I get a dialog box that says that the license was accepted but the upper left part of the screen still says "demo". I'm getting conflicting messages here. Probably something I have done wrong.   Any body have an answer to this problem?  Thanks

 10 
 on: March 27, 2017, 09:57:24 PM 
Started by shag - Last post by leon crist
This should get you close to what you wanted. You will have to adjust the switch offset to match your machine and the Feedrate to what you want.

'M3 Macro for TOM G31 Version
Cfr = GetDro(18)
Code"G31 Z-5 F20"                                     ok so  what does this do  the is it the distence from switch  Code"G0 Z .080"     'Switch offset  ok my swich kicks probe light on at .340 so do i put that in the pierce height then   
While Ismoving()
Wend
Code"G92 Z0"
While Ismoving()
Wend
Code"G0 Z .080"     'Switch offset
While Ismoving()
Wend
Code"G92 Z0.000"
While Ismoving()
Wend
COde" G0 Z0.120"    'Pierce Height
While Ismoving()
Wend
SetDro(18,Cfr)
While Ismoving()
Wend
DoOemButton(110)  'Fires Torch reset THC height
END



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