Ok, by way of set up, no I didn't copy every bit of Tankman's drawing. Ran out of time to play. Left off a lot of the text and dimensions, but in reality, if it works on one bit of text it will work on it all. If it screws up one bit, it will screw it all up.
Here's what I found. In both programs, neither of them know what a circle is. Makes them into lwpolylines making it impossible to use center or quad osnaps. Neither of them recognize a hatch, and turns it into a bunch of individual lines. That is not unexpected. The program I used put a line through the circle in the center of the big section view that shouldn't be there.
Tank's drawing was scaled up 10x. Mine scaled up, but some weird amount. Figured up to be x6.4259259259259....till calculator ran out of digits. Mine also moved the whole drawing away from the 0,0 origin it was set at.
They both handled the text much better this time around than they did on the scanned drawing I posted yesterday. Tankman's program made each letter an individual bit mtext, and mine made each line into a separate bit of text. Either way is usable and easily edited as needed. Mine lost the text on the mleader though and scrambled up the line that had the depth symbols on the counterbore.
There was a considerable difference in how it converted the lines in the drawing. If you look at the view at the bottom of the page in Tank's drawing, his converter did that line along the bottom of what I'd call the front view in several segments. See below:
That's ok, the segments run from the endpoint of one vertical line to the other. At least that's predictable and easy to fix. Mine did it wierd:
Why it decided to make those particular segments into one polyline, I don't know.
Unlike the 1.5mb file it created yesterday, this one is about 50k.
If you just needed something to look at or to drop in and get the main dimensions off of, Tank's version is better than the one I have.
If you wanted to model this part in 3d though, neither one is acceptable and you'll have to redraw it from scratch. The way the both handle circles is a major problem.
Bottom line is that if you create the PDF from Autocad or Photoshop you get a much better conversion. If you use a scanned drawing, you might as well have an army of 5 year olds copy the drawing for you. If you need to do any kind of serious work with the conversion, you're going to need to redraw it.
If you have a drawing that you need to send to someone else, why go to the trouble of making a pdf, emailing that, then the other guy converts it back to a dwg, does what you hired him to do, then makes another pdf, emails it back to you and then you have to convert it again? Why not just send the dwg file in the first place? He can work on it, send it back to you and have done.
My conversion is attached if anybody wants to fool around with it.