X1 Ultra stand

A frame table for the X1 Ultra

Two long 2×6 rails, two end rails, six joists on 16 in centers, six 4×4 legs, a lower 2×4 ring, two plywood end panels, and a three-piece plywood top. You and a helper build each long side flat on the floor, stand the sides up, and tie the ends. Each side frame is about 50 lb. The machine’s long walls are heavier: three people on a wall, and a lift table if one is over about 150 lb. The 12 ft boards need a longer vehicle or a delivery.

Footprint 113.5 × 66 in

Top height 36 in

Work surface About 37.6 in with the 40 mm bed

Levelers About an inch up or down

Stand 25 pieces, 3 fastener types, 13 steps, 6 levelers

Shop time 4 days. Days 1–3 build the stand and set the machine. Day 4 is hook-up and buffer.

Coated slab. The floor is polyaspartic over concrete. Put a felt or rubber pad under every foot, keep a blanket under the side frames while you build, and lift the table when you move it.

One shop plan

Day	Work	Done when
1	Pick the straightest boards and cut. Two side frames, then end rails and joists. Rip the panel strips. Steps 1–4.	The box stands, the six joists are in, and the panel strips are set aside.
2	Level, end panels, three plywood pieces, sand the seams, then the push test. Steps 5–8.	The top is flush, and you know if the frame leans.
3	Outline, the steel plates, the egg-crate, then assemble the machine on the deck. Steps 9–12.	The ring is together on the plywood. The bed still lifts off.
4	Hook-up and buffer. Chiller, exhaust, level, push test again, smoke test. Step 13.	You can leave it for the night.

DAY 1 · STEPS 1–4

Frame

Side frames on the floor, then stand them, add joists, and rip the panel strips.

DAY 2 · STEPS 5–8

Top

Level, end panels, three plywood pieces, sand the seams, then the push test.

DAY 3 · STEPS 9–12

Bed and machine

Outline, the steel plates, the egg-crate, then assemble the machine on the deck.

DAY 4 · STEP 13

Hook-up and buffer

Chiller, exhaust, level, push test again, and a smoke test.

Why it does not sway or sag

The machine and the bed sit on the plywood, the plywood sits on joists every 16 inches, the joists sit in two long rails, and those rails are bolted to six legs that run straight down to the levelers. Why the middle legs matter: the long rails are only strong enough with the middle legs bearing; do not skip them. Each plywood seam lands on a joist center, so every sheet edge has wood under it. The end panels and the lower 2×4 ring keep the ends from leaning, and the plywood ties the top into one sheet. When it is standing, push the deck sideways with about 50 lb. Add a pair of panels on the long sides only if you can see or feel it lean, or the level bubble moves. Repeat that push once the machine is on.

The laser bed

The bed is two 1.5 mm steel fire plates, each 1200 × 1200 mm, with two laser-cut steel egg-crate panels on top. Each panel is 1200 × 1200 mm, 24 blades and 7 ribs, 38 mm tall. The blades and ribs interlock, and nothing is fastened between them. The Bed tab has the model and the cut files.

The stack is about 40 mm: 38 mm of egg-crate on a 1.5 mm plate. Z travel is about 80 mm. It is not yet known whether focus height is measured from the machine bottom, so a way to raise or lower the machine may be needed. That question is still open with ACMER.

Lay the two plates on the open frame and fix them to it. Set the two egg-crate panels on top, side by side, and fasten them through the bottom or with semi-permanent clips. Nothing is fastened in the work area.

The six levelers level the deck. After the panels are on, check the head height at the corners and the middle.

The CNC waste board is later: two pieces of ¾ in MDF, about 48 × 48 in, screwed along the joist lines. The panels and the plates come off for CNC and for cleaning. Buy the MDF on CNC day.

The machine is 2834 × 1630 × 341 mm (111.6 × 64.2 × 13.4 in) and about 550 lb. It has an open bottom and no feet. This deck is 113.5 × 66 in, so the ring sits fully on the plywood, about 0.95 in in from each end and 0.9 in in from each long side.

Tools: a circular saw and a 4 ft straightedge, a drill with a long ½ bit and a Torx bit, a wrench, a level, clamps, shim stock, and sawhorses. A table saw is not required.

Shop & cut list

A 2×4 is 1½ × 3½, a 2×6 is 1½ × 5½, a 4×4 is 3½ × 3½, and ¾ plywood is 23/32, about 0.72 in thick. The frame is a mirror image left to right and front to back.

Legs are 32.78 in if the leveler is 2.5 in. Dry-stack your real leveler before cutting. At that length only two legs fit in an 8 ft 4×4, so buy 3 posts.

Shopping list

Cut list

How the boards break down

Hardware

Item	Qty	Where it goes
3½ in structural screws	About 60	Rails, joists, lower ring
#8 × 2 in plywood screws	About 170–220	Plywood to the frame, plus two screws into each leg top. 2 in still has bite after the sheet.
½ × 6 in carriage bolts, washers, nuts	28 (use 26)	Washer and nut on the inside face of the leg. On the top rail they sit 2 in and 4¼ in below the rail top. 6 in leaves thread past the 1.5 in rail and the 3.5 in leg.
Steel swivel levelers, at least 1,000 lb, with a pad	6	One per leg. Measure mid-travel before you cut.
Felt or rubber pads	6	Under every foot, on the coated slab
Wood glue	1	Joists, rails, and the plywood top
4 ft straightedge and shim stock	1	Seam check on the top
Steel fire plate	2	1200 × 1200 mm, 16 ga
Egg-crate steel panel	2	1200 × 1200 mm, 1/8 in steel, laser cut from the Bed files
¾ in MDF, 4×8	Later	CNC waste board only. Two pieces, about 48 × 48. Buy it on CNC day.

Tools

Circular saw and a straightedge or a track saw. A table saw is not required.
Speed square, framing square, tape, pencil.
Drill/driver. Bits: ⅛ in pilot, a ½ in bit at least 6 in long (or an extension), a Torx or star bit for the structural screws, and a countersink.
A wrench or socket for the nuts (¾ in for a ½ nut) and for the leveler nuts.
A 4 ft level, a 4 ft straightedge, and a 2 ft level. Shim stock. Four clamps. Two or three sawhorses. A blanket for the floor.
Safety glasses, hearing protection, dust mask.

Site and safety

Coated slab. Pads under every foot. Lift, do not drag.
About 48 in of clear aisle along one long side.
Two people for the sheets and for standing the side frames. Each side is about 50 lb.
The 12 ft boards need a longer vehicle or a delivery.
The machine’s power draw is still unknown, so do not size a new circuit yet.

Step 1

All steps

Whole bed

Steel egg-crate bed

One tooth-blade part and one rib part, repeated throughout. Each panel is 24 identical blades and 7 identical ribs. The bed is two panels, 48 blades and 14 ribs. All blade slots meet ribs at tooth valleys: 180 mm rib pitch is exactly 15 of the 12 mm tooth pitches. Both parts reverse end-for-end or face-for-face; keep teeth up, blade slots down and rib slots up. Blades and ribs are the same 1/8 in steel. Two greys keep the crossings easy to see.

The two panels sit on the deck, inside the opening, 2400 × 1200 mm together. The work rests on the tooth tips. Vents in the bottom edge, 20 mm tall and 120 mm wide with square corners, let air and debris pass between cells. Two 1.5 mm steel plates sit under the panels. Steel takes diode, infrared, and CNC use. Blades notch up from the bottom, ribs notch down from the top, and they drop together. No bolts and no welds. Confirm the size after the inside opening is measured.

Bed files

Blade and rib, DXFOne blade and one cross-rib, in millimetres, including the six bottom vents, 20 mm tall with square corners. Layers CUT and LABELS. This is the laser file for a single part of each. One panel on a 4×8, DXFAll 31 parts of one panel, nested on a 1220 × 2440 mm sheet. Dimensioned drawing, PDFTwo pages. The corner, the slot, the top view, and the part list. Assembly picture, PNGHow the blades and the ribs drop together. Both are the same steel. The drawing uses two line colours so the parts are easy to tell apart.

Size Two panels, 1200 × 1200 mm, 2400 × 1200 mm together. 38 mm tall.

Weight About 33 kg a panel. About 65 kg (143 lb) for the whole bed.

Lift Two people lift one panel. Do not lift the whole bed at once.

Parts 24 blades and 7 cross-ribs a panel. 48 blades and 14 ribs in all.

The drawing’s inside opening, about 2530 × 1470 mm, is an estimate. Measure the real opening before the steel is cut.

Slot and tooth sizes

Blades run the long way, 50 mm apart, 38 mm tall including the teeth. Teeth are 4 mm tall on a 12 mm pitch.
Ribs run across, 180 mm apart (15 tooth pitches), the first and last 60 mm in from the blade ends. A rib is 34 mm tall, so only the teeth touch the work.
Slots are 3.4 mm wide and 17 mm deep (half the 34 mm rib height). The steel is 1/8 in, 3.18 mm, so the 3.4 mm finished slot includes 0.22 mm clearance. Vendor applies kerf compensation once; these outlines are not toolpaths. Ribs stay at the 34 mm tooth-valley height, below the 38 mm tips.
Each blade has six vents in the bottom edge, 120 mm wide and 20 mm tall, rectangular, centered between the ribs. Both blade ends have 25 × 20 mm reliefs, creating a continuous 50 × 20 mm opening across the panel seam. Ribs have 30 × 12 mm rectangular vents between blades.

Machine lift

The steel bed stays on the table. Fourteen actuators raise only the machine.

How the lift works

The two fire plates and the two egg-crate panels are fixed on the deck. The ACMER X1 Ultra has no feet and a flat underside. Fourteen small electric actuators, mounted to the table frame from below, push up on flat steel pads under the machine skirting. That raises the whole machine off the bed and gives more room above the grid, including when an MDF board is on it. The plates and the egg-crate do not move.

Five actuators sit on each long side, corners included, and two more sit on each end. Four steel stops at the corners keep the machine from sliding sideways. Each actuator is a 12 V screw with a 100 mm (4 in) stroke. A limit switch stops it at the bottom and at the top. The screw is self-locking: it holds the load when the power is off. A level sensor reads tilt. An ESP32 controller board, on the shop Wi-Fi, serves the phone screen.

A height change is rare. Start with every actuator on its bottom stop. Run them all up at the same time, by the same amount. Then trim one at a time, using the level sensor, until the machine is level. The self-locking screws hold that height. The lift does not lift the bed.

Where the 14 actuators sit

Top view. Orange numbers are the actuators. Grey marks are the four corner stops. The long axis of the machine runs left to right.

Parts

Item	Qty	Where it goes
Linear actuator, 12 V, 100 mm (4 in) stroke, about 88 lb rated, with limit switches. The screw is self-locking and holds the load when power is off.	14	On the frame, under the skirting. Five on each long side, two on each end.
Steel pad	14	Flat plate under the skirting. The actuator pushes on this pad.
Corner guide stop	4	Steel stop at each corner. Keeps the machine from sliding sideways.
12 V power supply, about 600 W	1	Feeds the actuators.
ESP32 controller board with Wi-Fi	1	Runs the phone screen.
Dual-channel motor driver	7	Each driver runs two actuators.
Level (tilt) sensor	1	Used while trimming the machine level.
Wiring and fuses	1	From the supply to the drivers, the controller, and the stop button.
Emergency stop button	1	On the wall. Cuts power to the actuators.

Notes

Design load is 500 lb for the whole machine, about 35 lb on each actuator.
ACMER lists the packaged weight at about 250 kg.
Fit and test one actuator before mounting the other thirteen.
Z travel on the machine is about 80 mm. It is not yet known whether focus height is measured from the machine bottom, so a way to raise or lower the machine may be needed. That question is still open with ACMER. Four inches of lift travel leaves margin for the bed and for a sacrificial board.

Phone controller

CONCEPT

Not connected

This is a picture of the phone screen. These controls do not move the machine. Use Raise and Lower on the 3D view.

Raise Lower Level

Jog one actuator. Numbers match the diagram.

FAQ & specs

Confirmed vs. still unknown about the machine

	Item	What we have
Confirmed	Work area	1250 × 2450 mm (49.2 × 96.5 in), about 80 mm of Z travel
Confirmed	Machine size	2834 × 1630 × 341 mm (111.6 × 64.2 × 13.4 in). About 550 lb. The 113.5 × 66 in deck carries the whole ring, about 0.95 in in from each end and 0.9 in in from each side.
Confirmed	Feet	None. Open bottom. The ring sits on the plywood.
Confirmed	Cooling	Separate water-chiller cabinet. Compressor, tank, screen, and E-stop are on that cabinet. It wants 5–40 °C indoors, so heat the garage in winter.
Confirmed	CNC spindle	200 W, 52 mm body
Confirmed	Exhaust	One port on the rear profile, 130 × 125 × 70 mm. Leave at least 24 in clear behind that end and keep the duct run short.
Confirmed	How it ships	Left and right walls, front and rear ends, an X-axis beam, and a sliding door, joined with M4 and M5 screws. Weigh each piece. Three people per long wall. Never lift the assembled ring.
Confirmed	Bed stack	Two 1.5 mm steel fire plates, each 1200 × 1200 mm, then two egg-crate panels, each 1200 × 1200 mm and 38 mm tall. The stack is about 40 mm. Z travel is about 80 mm. It is not yet known whether focus height is measured from the machine bottom, so a way to raise or lower the machine may be needed. That question is still open with ACMER. See the Bed tab.
Unknown, asked of ACMER	Power and bottom vents	Not published. Long sides stay open until vents are known.

Floor and a twisted board

Point loads from the levelers are fine on the coated slab. Pads go under every foot.
A twisted 2×6 can be a joist, crown up, if the screws pull it to the line. Do not make it a long rail.
If your leveler is not 2.5 in at mid-travel, recut the legs. Leg length is the top height, minus 0.72 in of plywood, minus the leveler you measured.
After about a month, check the level and tighten the bolts. The bed can be shimmed if the top is a little off.

Changing the height

The plywood top is one number in this file: TOP_H = 36, near the top of the script. Leg length, the end panels, and the 4×4 count follow it. The 40 mm bed puts the work surface about 1.6 in higher.