Qcad Dimensions

[Xena Donovan]

Ifyou drew your flat pattern in Adobe Illustrator, we have guidance on preparing Illustrator files for our bending services here. However, while we can bend parts originating from Illustrator files, we strongly recommend switching to a true CAD program like Fusion 360 or QCAD for designing parts that require bending or hole operations.

Then scroll down to the Design Considerations. The Design Considerations section for each material thickness is where you can find critical specifications for all available operations in one place.

The Bend Relief Depth value listed for each thickness in the material info pages should be measured from the bend line, and the notch should extend to at least the recommended relief depth.

You can confirm the minimum distance required for your chosen material by finding the Minimum distance from center of bend to center of hardware insertion hole(measured from flat pattern) value in the Design Considerations.

You can use the Aligned Dimension tool (keyboard shortcut DA) to measure from the center of the hardware mount hole to the bend location line, which should mark the center of the bend.

When you select your material of choice at the top and enter your desired base and flange dimensions (after bending,) the calculator will take the internal radius of each bend, the bend deduction, and the K factor into account when it provides the flat dimensions you need.

QCAD Community Edition is a free, open source application for computer aided drafting (CAD) in two dimensions (2D). With QCAD you can create technical drawings such as plans for buildings, interiors, mechanical parts or schematics and diagrams. QCAD works on Windows, macOS and Linux.

However, when I imported the DXF file into a CAM program which had its work surface set to 2500 x 1220, the dimensions of the Sketchup file were wrong. The drawing was in fact about 10% (exactly 10.32%) oversize.

That was my guess. A long time ago, in a galaxy far far away, I had a model in parallel projection, slightly tapped my mouse with orbit selected and saved the scene. All the dims were off. Took me a bit.

You take the Bezier curves and straight lines " tool, you put the firstpoint, you press CTRL and you place the second point at an approximatedistance from the first, and then you press Enter to end the segment.

Inkscape : It takes into account the width of the contour stroke. The 50 mm line is indeed constituted of two nodes, 49.5 mm apart, with at each end, the width of half a stroke. So : 50=0.25+49.5+0.25.

The SVG format records, for that object, on one side, the nodes, andseparately, the style of the stroke, including its width. One can have a lookat the xml file to understand that.

Moreover, in the SVG file, the unit is the pixel, not the mm. It is the reasonwhy you never retrieve exact numbers in millimeters.

Inkscape converts the dimensions set in millimeters into pixels, using adefault resolution of 90 dpi (pixels per inch of 25.4mm).

When you work with the goal of exporting your drawing towards QCAD, it ismore interresting tu use that second option, so that you visualize thedimensions that will really be taken into account in QCAD, which are onlydepending of the position of the nodes.

In the previous operation of www.drystacked.com and www.learnqcad.com, we had offered a Qcad training CD. Since then the CD has been dropped and the associated videos were put up on YouTube. The associated Qcad house plan videos and drawing files were never included on YouTube for various reasons.

Video-2 (33:15) Learn to practice manipulating the download drawings before creating your own drawings. Also includes practice moving wall segments, measurement rounding errors, extending dimensions vs shortening dimensions to achieve 1/2-block wall segments. Also addresses mortaring first block row, intersecting lines vs corner selections, and correcting dimension errors.

Video-3 ( 20:00) Adjust door and window locations, determine rebar cell locations, adjust and or fix wall segment dimensions, application of the spread sheet tables in the book (Appendix-A), creating additional required drawings from an original drawing.

These videos are unique to Qcad users because of the large scale differences between the house-plans drawings and the real world house dimensions. Once you learn how to manage these size differences, then house plans become much easier to create and edit.

Create lines in the half angle between two existing lines. You can specify the length in the box appearing at the top left of the window.

The bisector appears between the two lines and at the same side of the lines where the mouse cursor was located while clicking the objects.

This can be used to draw arcs with a given center, circle line and the start / end angles. Click the center, a point on the circle line and then a point on the imaginary line from the center to the start point of the arc and a point on the imaginary line from the center to the end point of the arc. During one of these operations you can choose the direction of the arc in the box appearing at the top left of the window:

With this tool you can create arcs with three points given: The start point, a point somewhere between on the arc and the endpoint. Click the start point first, then a point between and at last the endpoint.

Tick the "Proportional" check box to automatically adjust the values "Letter spacing", "Word spacing" and "Line distance" to the "Textheight". If you don't tick "Proportional" you can adjust these values individually.

You can create texts with a fixed letter width by ticking the check box "Fixed width". This can be useful for inserting ASCII files which are formatted with spaces (lists, tables). For such purposes it's recommended to use the font "courier".

With this tool, it's possible to create angle dimensions between two lines. If you need to dimension an angle but don't have two lines, I recommend to construct two auxiliary lines first. You can delete these lines after doing the dimensioning, if you like.

After choosing this function you must select the elements of one or more closed contours. The elements should be connected properly. Otherwise the result is undefined. If you select two overlapping contours, however, every other area gets hatched. QCad currently can't hatch contours given by not connected but intersected bounding objects. Please cut these objects at the edges and select only the closed contour then, like shown in the figure below.

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