This is beginning to 'do my head in' as my youngest would say. I'm trying to model a coupling rod, so I draw the boss at one end, then a vertical line from the centre 1/2" long and a horizontal line 5/32" long. Then mirror the horizontal about the vertical, and using the constraints icon, lock these 3 lines. All very nice so far, everything in black and no error messages
If I then offset the vertical line either side I get 2 red lines,
but no matter what it won't let me lock them, I get an error message
a constraint cannot be applies as it results in an over-constrained or inconsistent sketch.
My simple mind thinks that if the first vertical line is constrained, then creating an offset to a dimension results in another constrained line, but apparently not
If I then trim the outer curve inside the red lines and the red lines back to the outer curve, the outer curve which was constrained becomes unconstrained, and it won't let me lock it, same error message. If I try to make it coaxial, it says the constraint already exists.
This continues if I just ignore it and offset the vertical line by half the rod length and then mirror the boss about this new line, all of the new boss is unconstrained, but won't let me constrain it. If I carry on it does produce a convincing model, but #2 son is full of warnings about lack of constraints. Not finished yet, got to do the fluting, but it would be nice to know I'm not going to have to start again
but there are 3 red lines left which I can't get rid of.
HELPPPPPP
Edited By duncan webster on 02/12/2018 15:03:59
Edited By duncan webster on 02/12/2018 15:14:13