Embedded Files
Manufacturer: Forest Scientific
Model#: BT 4x2
Stock#: n/a
Serial#: 1606-VC3ALS-BT4x2MG-11176
Spindle Motor Model#: 75182 (Porter Cable)
Acquired: June 2016 (New)
Purchased from: NW Technical Products
Vacuum table added May 2021 by Forest Scientific; Becker Vacuum Pump, Serial #: C3466960
Manufacturer: Forest Scientific
Model#: Makerfab 4x8
Stock#: n/a
Serial#: NWT-1802-VC3ALS-MF4X8R-11339
Spindle Motor Model#: 75182 (Porter Cable)
Acquired: February 16, 2018 (New)
Purchased from: NW Technical Products
Vacuum table added October 13, 2021 by NW Technical Products and Forest Scientific, Republic Manufacturing vacuum pump, serial # 60014139
FOR STUDENTS / USERS:
FOR STUDENTS / USERS:
Determining Proper Tool Feed Rates (Wood & Plastic) (Use this document to replace the default feed rates (which are really slow) with more appropriate feed rates.)
Instructions for Using the Forest Scientific 4x2 and 4x8 CNC Routers (General instructions to follow when out at the routers, after you have generated a file to run.)
Recommended Tools and Tool Settings for Processing King Colorcore plastic on a CNC (Use these settings for the shown bits when using V-Carve to prepare CNC files).
Amana Tool Spektra-Plastic O-Flute Speed & Chip Load Chart (one of the common bits used to mill plastic)
Video Tutorial Showing you how to Prepare and Download .STL files of terrain here on Earth to carve on the CNC's (The speaker shows you how to use the online application Touch Terrain to download a file of topography here on Earth that can be carved using VCarve.
Instructions for Using the Techno Davinci CNC Routers (General instructions to follow when out at the routers, after you have generated a file to run.)
General Notes Regarding CNC Routing at CVHS (Have you never used the Forest Scientific or Techno Davinci CNC routers before? Start your learning by reading these general notes.)
Contour and Pocket Toolpaths Using Mastercam (Refer to this document for all of the Mastercam settings that are used when creating contour and pocket toolpaths. Depth Cuts are explained within this document.)
MAINTENANCE HISTORY / REPAIR NOTES
MAINTENANCE HISTORY / REPAIR NOTES
The 4x2 table received a vacuum table upgrade in May 2021.
The 4x8 table received a vacuum table upgrade on October 13, 2021 by Forest Scientific and NW Technical Products. Andrew Hill was on site on 10/13 and completed table milling and vacuum connections. Andy indicated that MDF is usually the best spoil board material to use.
2/17/22: The linkage piece connecting the cable guide chain for the y-direction gantry motor was discovered broken. A new part was requested (and sent) by the manufacturer at no cost.
2/23/22: 4x8 Table: While surfacing a slab, the step-down height was accidently made too much (over 1/4 inch). This blew the 15A fuse driving the router. The 15A fuse from the smaller 4x2 table was stolen to put the router back online. This fuse was replaced.
Spec for 15A fuse for both tables: McMaster Carr Part #71385K527, overall length 1.25", diameter .25", ceramic time-delay fuse, Trade Size 3AB, manufacturer equivalent 326, 15 A, 250V.
Spec for 20A fuse for both tables: McMaster Carr Part #71385K527, overall length 1.25", diameter .25", ceramic time-delay fuse, Trade Size 3AB, manufacturer equivalent 326, 20 A, 250V.
3/3/23: 4x8 Table. While surfacing a slab, twice the machine took a dive in the z-direction (it seemed). After this, the x-axis stepper was growling. Additionally, jogging the x-axis, direction was not consistent. The positive direction button would sometimes make the machine go in the positive direction, but then it might go in the negative direction the next time it was pushed. After extended phone conversations with FS owner John Martincic (cel 412-726-0574) , it was determined the x-axis stepper was likely bad. The small cover on the back of the controller was removed and resistances were measured between the four wires going to this stepper. Black-white was .8 ohm (good). Red-green was 7.3 MOhm (way too much); Red-white was 6.8 MOhm (again, way too much). Forest Scientific sent a new stepper. This was installed today. In addition, the controller was opened and the 20A fuse holder was replaced so that this fuse could be removed if needed. The existing holder was broken. While open, the inside of this controller was vacuumed. If you need to open the controller in the future, do so by removing the top three screws on the left and the right sides of the controller. Don't remove any others.
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