Step 05.35 — Check backer clearance for the cable chain¶
Step 35 of 48 · Chapter 05 — Gantry: X and Y axes, XY joints, X carriage, titanium backers
Parts:
- cable-chain end link, for a dry fit · set out now, fitted later
Do: Offer the chain's end link up to the X and Y backers and see whether the holes line up and the stock printed bridge sits flat. Do not fit the chain; you are only deciding which bridge to keep.
Check
You know whether you will use [a]_xy_joint_cable_bridge_2hole or the raised XY_cable_chain_bridge-Igus-3mm_backer. "Igus" = the 2-hole pattern LDO ships. src
What you're looking at
A dry fit. The backers carry pilot holes for the cable chain's end link, and a 3 mm titanium strip may now hold the printed bridge's flat foot off the extrusion. The renders show the chain's fixed end and its run to the bridge.
Tip
The CAD is the 250 machine's; a 350 chain run is longer. Only the face the end link lands on transfers. The raised bridge is a mod part.
Good stopping point · ~35 min since the last one
MGN12 rail centred and screwed down on the X extrusion, titanium X backer on the rear face, cable-chain clearance checked. Carriage taped captive.
Source: Ti extrusion-backers README (tanaes) · LDO cable-chain guide · CAD: Voron 2.4r2 STEP @ de7e89d