CNC Lathe -- SmartLathEZ 1740

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|tool_subtitle      = with Centroid CNC7 T Series control
|tool_subtitle      = with Centroid CNC7 T Series control
|image              = SmartLathEZ_1740.jpg
|image              = SmartLathEZ_1740.jpg
|caption            = This is a picture of the lathe
|caption            = Millport SmartLathEZ 1740
|make              = Millport
|make              = Millport
|model              = SmartLathEZ 1740
|model              = SmartLathEZ 1740

Revision as of 14:42, 15 April 2018

Tools at the Asylum
Millport SmartLathEZ 1740 CNC Metal Lathe
with Centroid CNC7 T Series control

Millport SmartLathEZ 1740

General Info
ModelSmartLathEZ 1740
SerialAdd Me
Mfr. Specs
Training (experimental section)
Tool SpeciesLathes -- Metal
(Includes rubric, training information, and testing information.)
Asylum Info
LocationMachine Shop
Ownerthe Asylum
Operational Status
Latest Status
QR Code

Undocumented features

- Spindle M codes: Machine has a manual gear shift. G-code files must have the appropriate M codes inserted manually to achieve correct spindle speeds. If speed cannot be achieved in the set gear, the program will pause at that point and you'll have to manually stop the program. (This doesn't seem to affect manual spindle speed settings; only speed settings during a program.)

M41: Low (10-84RPM)
M42: Medium (45-380RPM)
M43: High (240-2000RPM)

Be sure to insert codes for spindle stop (M5) and Program Pause (M0) before any gear changes. Spindle MUST BE STOPPED to change gears! Also, the G-code interpreter only allows one M code per line, so you will have to enter all the M codes on separate lines. For example, you would add:

M5 (Stop Spindle)
M0 (Program Pause)
M43 (High Gear)

to your G-code file before the following line of G-code:

G97 S2000 M3 (Set spindle speed to 2000 RPM and start)

- USB port: There is a USB port on the right hand side of the keyboard tray. This is NOT standard equipment on a lathe of this vintage! (MS-DOS does not support USB.) Because of this, it does not work quite the same way a USB port on other devices does.

1) You must insert your USB drive into the port *before* powering on the lathe. If the drive is not present during the BIOS checks, it will not be recognized. (The shop USB drives can be inserted after powering on the controller. Other drives have mixed results as to whether or not you can insert them after powering on.) You must power down the lathe to remove the drive and change any files on it. Then re-insert the drive and power the lathe back on to read the changes.

2) Because the controller is running MS-DOS 6.2, only FAT16 volumes will be recognized. FAT32, NTFS, HPFS, etc... will not work. The largest volume you can have in FAT16 is 2GB (2^31 bytes). 2GB and smaller USB flash drives format to FAT16 by default in Windows and most flavors of Linux. USB devices larger than 2GB will have to be re-partitioned to make the primary partition 2GB or smaller. (You'll need Disk Manager in Windows or something like FDISK in Linux to do this.)

The USB drive is accessed through the Remote (F3) option under the Load menu. It usually defaults to Remote when you go to load a program.


The documentation specifies Shell Tonna 33 oil for the ways and tailstock. Shell Tonna 33 is equivalent to Mobile Vactra 2 - the same way oil used by the Sharp and Bridgeport knee mills.


The toolpost uses Aloris CA series tool holders. They work the same as the BXA series holders for the Colchester 2500, but are twice the size. (Aloris BXA is for 1/4" to 5/8" shank tools. Aloris CA is for 1/2" to 1" shanks. In other words, 1/2" or 5/8" shank lathe tools can be used both on the Colchester and the SmartlathEZ.)

The spindle mount is for D1-8 camlock style chucks. We have a 5C collet chuck (with 3 cams) and a 12" 4-jaw chuck (with 6 cams) for a D1-8 spindle. However, you MUST NOT EXCEED 650 RPM when using the 4-jaw! (The documentation says 770 RPM, but that assumes the machine is bolted to the floor. Exceeding 650 RPM causes substantial vibration in the machine.)

To prevent damaging the machine when using the 4-jaw, be sure you are in low or medium gear when you first start the spindle manually. Reduce the speed to 30% of maximum for that gear (or less) before switching to high gear.

The tailstock is a #5 Morse taper. There is a MT5 to MT3 reducer as well.

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