2026-10-25 1:13 PM EDT: Integrated machine phase begins

the designer handed design leadership to OSSO. The goal is a full-machine STEP assembly with assembly directions, covering components and assembly only (no software, firmware or final PCBs). OSSO leads a team of engineering roles, sends every choice to the designer as multiple choice with an Other option, marks blocking choices as IMPORTANT, snaps a version each work day at a point of notable progress, and puts feasibility experiments in TODO. Step 1 is an inventory of the subsystems, the gaps, a proposed team and an iteration plan.

2026-10-25 1:28 PM EDT: Five skeleton decisions (the designer)

1. Frame: custom 2020/2040 extrusion frame with a bed-slinger layout (the head moves in X and Z, the bed carries Y).
2. Head: 5 stations in one row (~118 mm).
3. Laser: overhead in front of the gantry, 150 mm lens.
4. Enclosure: fully enclosed, interlocked front door.
5. Electronics: bay under the bed, external compressor. Team: specialist roles run in the background under OSSO. Next is the skeleton assembly (overall size, zero point, travel budget, placeholder blocks).

2026-10-25 1:38 PM EDT: Skeleton v1 built; laser decision

Skeleton v1 (integration/skeleton_v1.*): the frame is 540W x 720D x 800H. Travel is Y 345, X 290, Z 100, tray 232. Nothing collides with the tray parked. Interlocks: head Z high while the tray is extended, and no lasing unless the tray is parked. TODO items 23-27 were added. the designer: the laser source connects directly to the galvo as one unit, like a typical engraving machine. There's no extra fiber or mirrors, and the chiller is external.

2026-10-25 1:39 PM EDT: Skeleton v1 answers (the designer)

• Needles: redesign the arm for a shorter folded reach.
• Tray pick: the tray moves in, the head picks, the tray backs out ~30 mm, then the head places.
• Laser working distance: build a ±40 mm adjustable mount now and measure later. Next: skeleton v2.

2026-10-25 1:58 PM EDT: Skeleton v2 done; laser architecture clarified

Skeleton v2: the frame is 700W x 720D x 680H, the needle stations use a vertical retract slide (46 mm drop), and the focus mount travels ±40 mm. Interlock rules are v2. TODO items 28-31 were added. the designer sent reference photos (integration/refs/): a typical UV engraver, with the source and galvo as one inline unit on an arm that rides a Z column with a handwheel. The separate box is the chiller, and it's external. Skeleton v3 will compare the arm running along X with the arm running along Y.

• 1:58 PM: the designer: the laser's power and controls go in the electronics bay under the bed with all the other power and controls. Only the chiller is external.
• 2:00 PM: The tallest TH part above the board is 15 mm (this covers caps up to 10x12.5). Taller parts go on the card-holder and edge companions, or lie flat.
• 2:00 PM: Drives: MGN12 rails with lead screws on all axes (X, Y, Z).
• 2:01 PM: the designer: accuracy is the priority on the drives. Use preloaded MGN12H carriages and anti-backlash nuts, with a repeatability test in TODO.
• 2:01 PM: Tray: multi-row, always backs out to the same fixed spot before placing.
• 2:02 PM: Door: side-hinged on the left, interlock on the right.
• 2:02 PM: Fume port: on the top of the enclosure.

2026-10-25 2:19 PM EDT: Skeleton v3 built

The inline laser unit runs along +X on a front 2040 focus column with a T8x2 screw and handwheel, WD 230±40. The Y-arm option collided with the gantry in every case (it would need a periscope, which is ruled out). The frame is 700x720x680, with a Ø100 top fume port. New interlock rule 6: lasing only while the fume extractor runs. TODO items 32-36 were added. v3 missed the mid-run decisions (15 mm TH, lead screws on all axes, multi-row tray, laser PSU in the bay, left door), so v3b applies them.

• 2:20 PM: Focus drive: a NEMA17 on the T8x2 screw, for auto-focus later.

2026-10-25 2:39 PM EDT: Skeleton v3b built

The frame is 700x720x660. All axes are MGN12H with T8 anti-backlash screws, about ±0.02 repeatability, and the Y screw is supported at both ends. The focus is a NEMA17 on T8x2, with a braced column. The tray has 8 rows of 8 mm strips (~360 parts) and backs out to 442. The bay is 620x580x125 and holds the laser driver, PSUs, controller and drivers. The door is hinged on the left. The laser interlock now requires the tray at 442 or further back. TODO items 37-45 were added.

2026-10-25 2:40 PM EDT

Snap v17

• Files: 1386
• Tar: versions/OSSO_v17_2026-10-25.tar.gz (257M)
• Site pages: 37