Crossrail and Ram
AssemblyThe crossrail carries the saddle along the Y axis across the gantry, and the vertical ram slides up and down for Z. On large machines the crossrail itself can be raised to clear tall workpieces. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for Crossrail and Ram
8 top-level lines as of r72003| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Crossrail | gmm-crossrail | 1× | 1 | · | part |
| 2 | Saddle | gmm-saddle | 1× | 1 | · | part |
| 3 | Ram | gmm-ram | 1× | 1 | · | part |
| 4 | Y Ball Screw | gmm-y-screw | 1× | 1 | · | part |
| 5 | Z Ball Screw | gmm-z-screw | 1× | 1 | · | part |
| 6 | Linear Guide Rail | linear-guide | 4× | 4 | · | part |
| 7 | Counterbalance Cylinder | gmm-counterbalance | 1× | 1 | · | part |
| 8 | Ball Bearing | ball-bearing | 6× | 6 | · | part |