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Tools/boxford: Difference between revisions
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[[User:Stever|Stever]] ([[User talk:Stever|talk]]) 08:14, 8 September 2018 (UTC)
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== Introduction ==
[[File:Boxford 260vmc 02.jpg|250px|thumb|The Boxford 260 VMC Milling machine]] The Boxford 260 VMC is an educational model CNC mill that is in the process of being upgraded with a modern controller and electronics. The CNC milling machine has a maximum travel of 240mm x 130mm and a vertical travel of 130mm, the spindle is speed controlled from 0-3000rpm. It's suitable for use with Aluminium, Brass, Mild steel (with caution), stainless steel (very, very slowly) and most Plastics. The Boxford mill requires [[tools/boxford/induction|induction]] before you can use it as it is a complex and challenging to use tool. The boxford is currently undergoing a program of repairs and upgrades so it may be taken out of service at any time with no notice. Information below may be out of date, contact Steve if you need to know the current status of the machine. The boxford is kept downstairs on the west wall between the drill press and the linisher.
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== Known Issues ==
* Shaft of Z-axis stepper motor is bent, needs replacement, should consider using a hybrid stepper-servo
* Door interlock switch disconnected (might not want to reconnect)
* Limit switches missing
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== Machine Details ==
* Controller: Custom built smoothieboard made by Richard-I connected to a micro-PC
* The motor is a Lenke 18V DC motor operated by an RS speed controller and can produce spindle speeds between 100-3000rpm▼
* Limit Switches: Product Number: IS-3002-ANOG were the originals, but now nothing
* Stepper PSU: 60V DC 1500W switch mode power supply
* Stepper drivers : DM860H 7.2A fan-cooled stepper drivers
▲The motor is a Lenke 18V DC motor operated by an RS speed controller and can produce spindle speeds between 100-3000rpm
▲Motors are NEMA34 8-wire steppers that are about 80mm deep, torque and current specifications are unknown. The PSU is an unregulated 34V supply derived from a mains transformer. The drivers are DM860H 7.2A units
== Boxford Caretakers ==
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== Recent Changes ==
* Replace PSU with 60V 1500W unit, re-install enclosure lights, tidy wiring considerably, re-install protection fuses, connect spindle driver to E-stop system [[User:Stever|Stever]] ([[User talk:Stever|talk]]) 18:03, 25 March 2021 (UTC)
* Readjust gibs that had loosened [[User:Stever|Stever]] ([[User talk:Stever|talk]]) 18:00, 19 March 2021 (UTC)
* Fitted new drivers, wiring is a mess that needs redoing. [[User:Stever|Stever]] ([[User talk:Stever|talk]]) 22:01, 27 February 2021 (UTC)
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