Equipment/Boxford CNC Mill

CNC Mill
Model	Boxford 190VMC
Sub-category	CNC
Status	Under construction
Training requirement	yes
Owner	DeanForbes, tgreer
Origin	Donation
Location	Basement, Robotics/CNC area

Specs

• 8 spindle speeds 350 to 3500 rpm
• Rapid traverse rate at 100% 2000mm/min (78"/min)
• Axis travel
  • X(longitudinal) 225mm (8.9")
  • Y(cross) 150mm (5.9")
  • Z(vertical) 140mm(5.5")
• System resolution 0.005mm
• Table dimensions 410 x 130mm(16.1" x 5.1")
• Spindle to table 202mm (7.9")
• Centre line of spindle to column 130mm (5.1")
• Table to column 5 to 130mm (0.2" x 5.1")
• Tee slots 2 x 10mm

Updates

• 13-Oct-2015 : System is now up and running using BCNC on Ubuntu
• 15-May-2015 : Dean, Phil et all doing conversion to Mach3 capable machine which will involve minimal retrofiting of mill and use of a PC
• 24-SEP-2014 : Mill works with V5 of the boxford software, need to enter administration mode in the graphical screen by pressing F10
• 12-JUL-2014 : Connector is DB25 and almost certainly serial. It appears there is an internal g-code interpreter.
• 10-JUL-2014 : Mill arrived, mechanics and electrics work, has a 25W serial port out the back, need to research how to interface.

ToDo

These things need doing by somebody interested in getting the machine running. I'll get onto them eventually (artag) but it's good to involve others. However, PLEASE co-ordinate over email and in this wiki - we don't want people duplicating work or working at cross-purposes.

• Attempt to use the dos-based Boxford software linked below - assuming this just reads a file of gcode and

controls stop/start, spindle, etc. it's all we really need and we can probably reimplement under Linux

• Make the machine safe against accidental movement while debugging.
• Determine baud rate and handshaking on the serial port. Might be done by running above software, If it won't run, then try sending some harmless gcode at various baud rates and try to get it working. Could also find out how the 26450 UART is set up, if it's what's used for the external port. There are some serial patch items by the lathe. Don't lose them. Use them to help work out the necessary cable (it's apparently a null modem).
• Major cleanup and re-grease. This is an activity that historically involves leaving all the bolts on one side, where they get lost. Do NOT DO THIS. Plan the cleaning carefully, only leave things in parts if there's no other possiblity, and then keep all the parts in one box, partitioned and labelled so they can still be restored after several months, perhaps by a different person. Take photos and link them to this wiki.
• Mach 3 conversion which does does not involve destructive modification and simply intercepting the feeds to the stepper motor drives and adding a spindle signal converter - This has been cleared by Phil the device as donated through his mate and Tom who collected it as well as discussed with a number of stake holders who agree on this route forward

More info

• 

  Boxford 1st, 2nd axis modification

• 

  Boxford GS-D200S Stepper Drive pinout

• 

  Boxford hack #4

• 

  Boxford hack #5

• (Mailing list post)
• http://www.glostertooling.co.uk/backup/download/Engineers%20tool%20catalogue.pdf look at page 8 the dimensions match at first glance
• http://wiki.xtronics.com/index.php/Tapers_and_Chuck_keys
• Spindle taper is a Coventry quick-change ref Or possibly EasyChange. maker examples

• Reliable Manual source (cheaper would be nice)
• Possible manual source
• V5 Programming Manual
• Photos by Russ

Boxford are said to be unhelpful regarding support and will only talk to educational users. However, they do publish spares lists and software updates.

• Spare parts
• Software

Needed

• A base/stand (ideally, a sturdy cupboard or machine cabinet like this
• ER type collect can be had from Gloster Tooling a price has not been obtained yet the, model is EC EM16 035 on page 8 @ http://www.glostertooling.co.uk/backup/download/Engineers%20tool%20catalogue.pdf
• Investigate g-code generation software and the interface - mach 3
• Further manuals or other information

Not needed

• People who take it apart and leave it in pieces
• Experimenting carelessly. Consider it in the same light as the laser cutter, the robot arm etc. : if you want to work on it, join the official maintainers group and cooperate.

Troubleshooting

• The cutter appears to spin off-centre
  • When slotting in the collet make sure to put it the right way in as it's got a notch which will only go in fully when aligned