Hello Guest it is September 17, 2019, 05:37:11 PM

Author Topic: Bridgeport Knee Mill Conversion?  (Read 159029 times)

0 Members and 1 Guest are viewing this topic.

Offline Davek0974

*
  •  2,577 2,577
    • View Profile
    • DD Metal Products Ltd
Re: Bridgeport Knee Mill Conversion?
« Reply #780 on: June 12, 2018, 02:08:23 PM »
All at 50ftlbs now :)
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives
Re: Bridgeport Knee Mill Conversion?
« Reply #781 on: June 13, 2018, 05:08:24 AM »
Dave

The figure of 50 ftlb came from a BP series 1 manual that I found on line. It has proved good for me,.

Allan

Offline Davek0974

*
  •  2,577 2,577
    • View Profile
    • DD Metal Products Ltd
Re: Bridgeport Knee Mill Conversion?
« Reply #782 on: June 13, 2018, 05:12:23 AM »
Great, thanks.

There was only one that was below 50, all the rest were ok but good to know.
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Davek0974

*
  •  2,577 2,577
    • View Profile
    • DD Metal Products Ltd
Re: Bridgeport Knee Mill Conversion?
« Reply #783 on: June 13, 2018, 01:04:18 PM »
Happy to say that fixing the head tram has fixed my problems :)
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives
Re: Bridgeport Knee Mill Conversion?
« Reply #784 on: June 13, 2018, 08:30:34 PM »
SWEET!!!!
Mike
We never have the time or money to do it right the first time, but we somehow manage to do it twice and then spend the money to get it right.
Re: Bridgeport Knee Mill Conversion?
« Reply #785 on: July 10, 2018, 04:03:14 PM »
:D ;D :D ;D

This code version works perfectly, it's one impressive addition to the mill, just increased it's usability 200% I think, she's now got 350mm of Z clearance under code control  8)

Of course, with every new feature there are new ways to mess things up of course -
do not enter a new tool manually in the "Current tool" DRO,
do not jog the knee manually once you have ref'd the Z axis and set the first tool or probe,
always enter the 1st tool/probe manually in the current tool DRO
probably a million other ways to make balls-up :)

I think a good addition will be to add some code to check that the new knee position is still a negative number as the axis runs out of travel at zero :)

One thing that did fail is the Index Homing on the knee - keeps throwing "Index not within allowed distance" error which means the index pulse is out of range, will have read the manual on this one.


Code: [Select]
Sub Main()

If GetSelectedTool() = GetCurrentTool() Then Exit Sub ‘***Do nothing if current tool is called again

If GetOEMLED(1866) Then Exit Sub ***Ignore M6 calls LED

‘***Get the current G90/G91 state
CurrentAbsInc = GetOemLED(48)

‘***Get Axis Scale factors in use
XScale = GetOEMDRO(59)
YScale = GetOEMDRO(60)
ZScale = GetOEMDRO(61)
CScale = GetOEMDRO(64)

‘***Set All Axis Scales to 1
Call SetOEMDRO(59,1)
Call SetOEMDRO(60,1)
Call SetOEMDRO(61,1)
Call SetOEMDRO(64,1)
Sleep(250)

‘***Get old tool length
OldToolLength = roun(GetToolParam(GetCurrentTool, 2))

‘***Set the requested tool to be the current tool
SetCurrentTool(GetSelectedTool())

‘***Get new tool length
NewToolLength = roun(GetToolParam(GetCurrentTool, 2))

‘***Switch to absolute distance mode
Code "G90"

‘***Move Z axis to machine zero - fully retracted for tool change
Code "G53 G0 Z0”
While IsMoving()
  Sleep(100)
Wend

'========================================================================================
' Start of Knee Positioning Code
'========================================================================================
‘***Get the knee position in machine coordinates
CurrentKneePosition = roun(GetOEMDRO(88))

‘***Get the respective backlash clearance allowance for downwards knee moves
If GetOEMLED(801) Then ‘***On  = English Measure INCH
    ClearAllow = 0.125 
Else                   ‘***Off = Metric Measure MM
    ClearAllow = 3.0   
End If

‘***Calculate the knee machine move value based on tool length difference
If OldToolLength > NewToolLength then ‘***We need to RAISE the knee
    Code “G53 G0 C” & (CurrentKneePosition - (OldToolLength - NewToolLength)) + ClearAllow
    While IsMoving ()
      Sleep(100)
    Wend
    Code “G53 G1 C” & (CurrentKneePosition - (OldToolLength - NewToolLength)) & “ F100”
    While IsMoving ()
      Sleep(100)
    Wend
End If

‘***If the knee is currently higher than it needs to be, we first
‘***move it down, to ensure the final move is always UP.  This ensures
‘***backlash is taken out and provides more consistent positioning.

If OldToolLength < NewToolLength then ‘***We need to LOWER the knee
    Code “G53 G0 C” & (CurrentKneePosition + (NewToolLength - OldToolLength)) + ClearAllow
    While IsMoving ()
      Sleep(100)
    Wend
    Code “G53 G1 C” & (CurrentKneePosition + (NewToolLength - OldToolLength)) & “ F100”
    While IsMoving ()
      Sleep(100)
    Wend
End If

If OldToolLength = NewToolLength then
    ‘Message “Knee Will Not Move” ‘***Use this line for debugging
End If

'========================================================================================
' End of Knee Positioning Code
'========================================================================================

‘***If G91 was in effect before then return to it
If CurrentAbsInc = 0 Then
  Code "G91"
End If

‘***Put previous Axis Scale factors back
Call SetOEMDRO(59,XScale)
Call SetOEMDRO(60,YScale)
Call SetOEMDRO(61,ZScale)
Call SetOEMDRO(64,CScale)
Sleep(250)

End Sub
   

I know you are no longer using this code but I think the reason you had issues with the Index Homing was a typo in your code.
The line Code "G53 G0 Z0”  contains an incorrect closing double quote.
I ran across this while studying how you are implementing the knee movement.

Great work!!
I should get around to implementing this on my mill later this year.

Offline Davek0974

*
  •  2,577 2,577
    • View Profile
    • DD Metal Products Ltd
Re: Bridgeport Knee Mill Conversion?
« Reply #786 on: July 10, 2018, 04:15:50 PM »
Yeah i got stuck several times with characters that look right but are not, since changing to Notepad++ its much better though :)

The knee axis is brilliant :)
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives