Fusion 360 part is 4 x larger, what am I doing wrong?

[Clive S]

hi. I am having a few faults with my mill and wonder if someone out there can help. I am using the following software. to draw the part I am using solidworks and then importing to fusion 360 to make the g code. I check the drawing worksheet in fusion to make sure that the part is correct.
then I download the g code to mach 3. but when I start milling on my little proxxon mf70 the part is 4 x larger. what am I doing wrong.
michael

OK first does the machine move the correct distance from the commanded move ie zero you x axis and then send it a G0 X50 it should move exactly. 50mm

Do this with the other axis. and report back.