Hello
Update use HP M211DW is ok
I have made a small pcb project by myself
but I have a problem with printing pdf by setting
it to the real size but my printer
can’t display it properly
Is there a solution?
Been awhile for me but I think the answer is to use plot? I see Kicad specifies 1:1 in print. I’m assuming the printer driver is messing with this? Supposedly to make sure people aren’t copying and printing currency. Good story. Might even have a bit of truth to it. 
Meh, Printers are simply not made to print to accurate sizes. All the mechanical tolerances (such as diameter of paper feed rollers) add up, and a tolerance of 0.5% is quite normal.
You can set a custom scale to either enlarge or shrink your output a bit:
You have to figure out what the actual scale factor for your printer is. Autocad used to have a printer calibration function, with different scale factors in X and Y direction. But it was 30 years ago that I last use that (In the DOS age). There probably is other software around which can do this, and .SVG or .DXF output is probably better suited then .PDF, but I have no current knowledge of that. The trend is to have dedicated machines for accurately sized output.
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Can you suggest a method to calculate x, y?
If it is 45mm on your PC, and the printout is 45.3mm, then it prints too big, and you need a scale factor that is just a tad smaller then 100%.
45/45.3 = 0.9933774 = 99.3%
You can do more accurate measurements of the paper when you print out something bigger. Something like a 180 by 270mm rectangle for example.
This method will expand both sides, right?
If the y side is correct, but the x side is wrong, will this method help?
You may need to export the image, and then use an external image editor to scale each axis independently.
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FYI…
My Printer is a 15 yr old HP low-cost printer.
The Printed Dim’s at 1:1 are Deadly accurate and compare accuracy with my
Homemade-Optical-Comparator
FOLLOW-UP:
I Ploted Postscript and PDF at 1:1 and Both are Identical and compared to Caliper’s. I drew them in Kicad with 0.06mm Line-Width.
Thus, I conclude there is Nothing Incorrect about this with respect to Kicad.
ADDED
I tried with Kicad and still have problem
When I use A5 paper to print, the result is some part of paper will not be as designed
I am not sure if it is A5 paper or not
But when I try A4 paper, there is a problem near the edge of the paper. It seems that the printer is trying to adjust
the size to fit the paper itself.
i use HP Laser printer 107W
Well, it’s not a Perfect World and sometimes thing’s (whatever they are) seem to get ‘discombobulated’ (that’s a Real Word!)
My Printer is: HP_P1605dn
A couple if comments from my testing this morning:
(For clarification I’m using PCB as example (not Schematic)
• I tested Letter 8.5 x 11: PDF, PS, Print - No Problems
• I tested A4: PDF, PS, Print - No Problems
• I tested A5: PDF, PS, Print - No Problems
Naturally, ‘Manually’ need to re-position items on the page after changing the Page Settings above and re-positioning the Two Items shown, always printed correctly. I did Not do any resizing of the items, I only re-positioned them as wanted (at Lower-Left and Upper-Right of the Page).
Thus:
• Must correctly Set the Page-Setup for the Printer and Plot.
• Must correctly Set the Page-Setup for the Plotter and use the A4-CheckBox in the PS (PostScript) Plot Panel, also ensure Scale = 1:1
Note: I get Correct Printing if I do the above then, I Open the Postscript (.ps) file and/or the PDF in my system’s Previewer and Print from there at 1:1 (100%). Also true for direct-Printing. Those Prints are always correct.
Also, if, for example, the Plot Settings are for A4 and I set my printer for US-Letter (8.5x11) at 100% scale, it prints on two sheets or on both-sides, as I decide but, the actual dimensions are correct per my Caliper’s.
So, unless I’m not understanding what you’re doing, I suspect you’re overlooking something.
It might be best to Detail ‘exactly’ the steps you’re taking. Otherwise, I do the steps I always use for printing anything (meaning, I ensure Setting’s are as needed…)
In All cases, I measured the Printed items and they are deadly accurate…
Adding a specific scaling factor to the output to your printer driver does not work as intended if your printer driver applies it’s own scaling factor (such as “scale to fit”).
Gosh, I hope OP reads and understands what I posted… and that it should be obvious to him/her that Scale to Fit is Not 100%… never know what folks think and do…
Hello
this video
i config like you
but output
this size 44.5mm not 45mm
this 44.5 + 44.5 + 2 = 91 mm
can scale in kicad one size ?
50mm x 44.5mm
A couple of thoughts:
- upgrade / downgrade your printer driver, MIGHT have an affect.
- Plot to SVG format, then use an SVG graphics package to do the scaling (if actually needed) and the printing.
Your output is 1.1% smaller than actual, so if you enter 1.011 in the ‘Custom’ field and you should be good.
i use wifi print drive not sure up or down grade driver
This may Help… In your video, I see you’re Printing according to Objects Tab of appearance manager…
I print the Drawing Sheet….
ADDED: Follow-up I printed using Both and you can see the slight-dimensional difference on the Width’s…
i set scale 1.011 this size not fix one size
A4 Print Drawing Sheet OK
Size 50 x 45mm
A4 Print according to Objects not ok
Size 50x44.5mm
Have you at least tried plot instead of print? I know this worked for me at some point in the past.