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Messages - OldMike

Pages: 1
1
FAQs / Re: Not able to increase motor velocity.
« on: November 26, 2022, 05:35:56 PM »
Thank you Graham.  It took me forever to find where to change the UC-100 frequency but when I finally did that was exactly what the problem was.  Thank you so much for your help.

Old Mike

2
FAQs / Not able to increase motor velocity.
« on: November 23, 2022, 04:21:14 PM »
Hello All,

Looking for some help here.
I have just finished a major mechanical upgrade to my CNC router which has operated well since 2017 when I built it.  I am using Mach3 and Windows 7 Pro, 32 bit (SP-1), 4 gig ram, AMD A4 3.8 GHz processor along with a UC100 and a PMDX-122 BOB as always with no problems.  One of the changes I made with this upgrade was to go to micro stepping.  I use Automation Direct drivers and 4 wire bi-polar 34 frame 3 stack motors.  One on the Z and X and two on the Y.  Always ran them at the 400 Smooth setting with no problems other than noisier at low speeds than I would like.  I have them set up now at 5000 steps per revolution and all is well as far as movement and scaling is concerned. 
My problem is that no mater what I do I cannot get more than 51 IPM velocity. The motors are direct coupled to the ballscrews so 25,000 steps per inch is what I need and it works fine. The scaling is dead nuts on the money.  I have tried various kernel speeds to no avail.  If I type in 100 IPM and save it then run the motors there is no increase in speed and in the motor tuning window the velocity is cut back to 50-51.  The machine runs great but I can't get any more speed out of it.  The other thing I have discovered is that I cannot get the Driver Test to open.  I click on it and nothing happens.  I have only used it once back when I first built the machine and it worked fine.  ????
This velocity thing has me puzzled so I'm hoping someone on here way smarter than me can show me the light. Something is limiting the ability to increase the velocity but I have not been able to find it. 

Thanks,
Old Mike

3
General Mach Discussion / Re: Auto squaring driving me nuts!
« on: March 20, 2017, 11:16:24 PM »
Thank you for your reply.  I guess I was expecting the gantry squaring to work the same way it did on the plate glass cutting machines I built for years.  I did do some more looking on this forum and finally found the answer I was looking for which was a simple explanation of what the Home Offset actually is used for.  I will simply adjust my B motor limit switch to square the gantry and be done with it.

4
General Mach Discussion / Auto squaring driving me nuts!
« on: March 20, 2017, 07:10:18 PM »
Hello All,

This is my first post here.  Hoping I can get some help.

I have been trying for some time now to get my gantry to autosquare.  So far the only way I have been able to do it is by modifying the button code for the "Ref All Home" button.  It works perfectly but for some reason the slaved motor (B) will not re-slave after the homing and squaring routine is finished.  If I press the up arrow on the keyboard after the machine squares, the Y motor will take off and the B motor will not move and of course it twists the gantry.

I have a brand new purpose built PC running Windows 7, 32 bit.  There is nothing else on the PC except Mach3.
I am running the latest Mach3 version and using the UC100 controller. 
I have the latest plugin installed for the UC100.
I have a separate homing switch for each motor connected to separate pins.
I have the "Home Slave with Master Axis" unchecked in the general config file.

If I install the default button code for the "Ref All Home" button, the machine homes perfectly and the slaved motor remains active however it does not square the bridge.  It also appears that it makes no difference what offset I enter for the slaved motor as the the gantry only moves off the homing switches equal to the offset entered for the Y motor ignoring the B motor offset.

I find it very hard to believe that I have not been able to find a fix for this.  Contacting the makers of the UC100 provided no help so I don't know if this is a Mach3 problem or a UC100 problem but I do know that it is a problem and surely I'm not the only one that is experiencing it.

If there is anyone out there that knows how to fix this I would be eternally grateful.  Other than the above mentioned problem, my machine runs great.

Below is the custom button code that actually squares the gantry but does not re-energize the B motor.

'Early versions of Mach had to make use of the
'following three lines of code after each command:

'While IsMoving
'Sleep(25)
'Wend

'This insured the command completed before going to
'the next line of code.  Newer versions of Mach may
'not need this code or may need it in some places
'and not others.

'If the code seems to "hang" you will need to CTRL+
'ALT+DEL and end the task for Mach3

'Restart the software and run the code again.  This
'time start back ticking some the the While IsMoving
'lines until the machine homes and squares up.

Dim boffset
Dim feedhome

boffset = 0.1 'change this value to adjust for squarness
feedhome = 5 'feedrate which to square the gantry

DoButton( 24 ) 'Home each axis normally
DoButton( 23 )
DoButton( 22 )
DoButton( 25 )

DoOEMButton(133)
DoOEMButton(134)
DoOEMButton(135)

While IsMoving
Sleep(25)
Wend
 
DoOemButton(357) 'Deslave Axis
While IsMoving
Sleep(25)
Wend

DoOemButton(1007) 'Zero All Axis
While IsMoving
Sleep(25)
Wend

Code "F" & feedhome
While IsMoving
Sleep(25)
Wend

Code "G1B" & boffset 'Move the B axis a small amount to square the gantry
While IsMoving
Sleep(25)
Wend

DoOemButton(1007) 'Zero All Axis
While IsMoving
Sleep(25)
Wend

DoOemButton(358) 'Slave Axis
While IsMoving
Sleep(25)
Wend

message ("Homing Complete")


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