Expert analysis
What you should know

By Ray KowalczykSenior Technical Editor โ CAD & Technical Printing Key takeaways
- The Canon TM-240 is a 24-inch roll-fed and cut-sheet inkjet printer for digital AEC drawing output.
- Its listed 0.1% line accuracy is relevant to fine CAD linework, dimensions, and detailed plan sheets.
- It supports HP-GL/2, HP-RTL, CALS G4, and JPEG for common technical-document workflows.
- There is no scanning or copying, so paper redlines and legacy drawings require a separate capture process.
- The Canon TM-250 24-in is the listed in-family alternative to consider when an MFP configuration is required.
It is 4:45 p.m., a permit sheet changed, and someone needs a clean A1 plan before the courier cutoff. This printerโs job is straightforward: produce 24-inch technical drawings, color-marked coordination sheets, GIS maps, and presentation-ready plan sets without turning a small office into a print room.
The Canon TM-240 is a five-color inkjet printer for AEC teams that need roll-fed and cut-sheet output but do not need scanning or copying at the device. It supports HP-GL/2, HP-RTL, CALS G4, and JPEG, which gives CAD-heavy and document-control teams practical file-language coverage. Its stated 0.1% line accuracy matters when fine dimensions, grids, and detail callouts need to remain legible on a full-size sheet. Bottom line: this is a focused plotter for drawing output, not a multifunction reprographics station.
24" (61 cm)Maximum roll widthSets the practical ceiling for roll-fed technical output.
A1 (23" x 33" (594 x 841 mm))Maximum print sizeFits common full-size drawing and map workflows within its width class.
0.1%Line accuracyRelevant when plotted dimensions and fine CAD linework must hold together.
2400 x 1200 DPIMaximum resolutionUseful context for fine text, hatching, and color-coded drawing elements.
Where it earns its desk space
The TM-240 fits small architecture studios, engineering satellite offices, survey teams, and construction trailers that print plans on demand rather than run sustained production queues. Roll and cut-sheet support is useful when a team alternates between plan sheets and smaller review documents. Borderless printing is available on listed A-series and B-series sizes, which can help with presentation graphics where a white perimeter is unwanted.
Network options are sensible for a shared office device: Gigabit Ethernet, Wi-Fi, USB Type-B, and Apple AirPrint are listed. The 4.3-inch touch display gives walk-up users a local control point. At 39 dB while printing and 35 dB in standby, it is specified for a quieter office setting than the sort of machine that announces every sheet to the whole floor. Bottom line: it belongs near the people marking up drawings, provided they do not also need to scan them.
The limits matter as much as the fit
There is no scanner and no copying function. That is the failure mode to identify before purchase. A team receiving paper redlines, field sketches, or legacy drawings will need a separate scan path. The 24-inch maximum roll width also rules out 30-inch and 36-inch drawing production. Firms regularly issuing wider civil sheets, large construction coordination plans, or full-width presentation boards should look at a wider device such as the Canon TM-340 36-in.
Within the listed Canon family, the Canon TM-255 24-in is the closer same-width alternative to evaluate when comparing current 24-inch choices. The Canon TM-250 24-in is the relevant option where an MFP configuration is part of the requirement. Compare the workflow, not just the chassis: a plotter that cannot ingest a marked-up sheet creates a second process at exactly the wrong moment. Bottom line: buy this configuration for digital-in, printed-out workโnot for scan-copy-print traffic.
Daily ownership and workflow questions
The physical footprint is 38.5 inches wide, 29.4 inches deep, and 17.3 inches high, with a listed weight of 88.2 lbs. Check the room around it, not merely the desk it sits on. Operators need space to load a roll, retrieve output, and reach the rear or side when paper behaves like paperโusually when nobody has time for it.
The printer uses five cartridges and a Canon PF-06 printhead. Budget for the Canon MC-31 maintenance consumable as part of normal operation, and confirm the supplied media and accessory configuration with the seller. Supported Windows versions listed are Windows 7, Windows 8.1, Windows 10, and Windows 11; listed Mac support covers macOS Big Sur, Monterey, and Ventura. For a broader view of its position, use the TM-240 versus TM-255 comparison and the 24-inch technical-printer ranking. Bottom line: validate drivers, paper workflow, and service support before the first bid set is due.
The read
The Canon TM-240 is a sensible fit for AEC teams with digital files, a steady need for 24-inch plan and map output, and limited room for a larger device. Its file-language support, Ethernet and Wi-Fi connectivity, roll and cut-sheet handling, and stated line accuracy align with everyday CAD and PDF plotting. The trade-off is plain: no scanning, no copying, and no path to wider-than-24-inch roll output. If those limits match the workflow, it is appropriately focused. If field redlines or wider sheets are routine, solve that problem before it solves itself at 4:45 p.m.