Custom hatch scale problem

[Anonymous]

Hi all,

I hope anybody can help me with this, please.

I downloaded an English rubble hatch long ago that was working more or less well before, I recently opened the file I was working with and since then I can only see it in a really big scale and it is not proportional in my drawing, so I can see it at a scale of 2200 but it looks huge on my drawing. If i change the scale i cannot see it.  

The hatch icon looks good from the pull-down menu.

I've been reading similar posts but I couldn't find an answer about how to deal with this matter as I do not know how to work or fix pat files. I tried to open the file and as I did not have the correct software I tried with the notepad and i just can see a lot of numbers that I do not know how to read or what they are for. I am trying to upload the file but I can't as i get this message: 

• The attachment's englishrubble.pat content type (application/octet-stream) does not match its file extension and has been removed.

Help please.

[pendean]

Did you change units sizes by chance? Hatch could have been created in ISO which requires crazy scaling in inches/feet units drawings.

BTW just ZIP then post the file when the system does not allow it.

[Anonymous]

Thank you for your prompt reply pendean 🙂 

I haven't changed any units, not that i am aware of, at least :s

I work in metric system but I got the hatch from a website from USA i think. Could it be that it was in the imperial system and that's why is not working anymore? Anyway, it was working before. Not greatly, as I remember I had to change the scale once but still i manage to make it work.

I have attached a ZIP file now, thanks for the tip.

[pendean]

can you post a portion of your DWG file with the problem in place too?

[Anonymous]

It is not the original drawing. I copied and pasted in a new drawing but the problem seems to persist. 

I realised that if I open a new drawing and draw a rectangle I can see the hatch in a smaller scale 420 so I tried to match properties but it does not work. I tried to extend that hatch pulling it but the pattern disappeared. 

[pendean]

There is nothing wrong with the hatch pattern, it works fine on your file the inches-to-mm 25.4 scaling (see below). That fact that someone created that 3/4-inch by 3-inch brick pattern is a problem you will need to adjust for with your math and scaling abilities to match the stone sizes you need in millimeter, AutoCAD has no ability to guess.

Or recode the hatch pattern file.

[Anonymous]

Glad to know there is nothing wrong with the hatch pattern but I can't fix my problem yet.

Excuse my ignorance, but I don't completely understand what you mean. I am not English and maybe I am misunderstanding your instructions.

If i put a scale of 25.4 I can't see any pattern on my drawing. I was trying with different scales and the only one that i can start seeing the pattern now is with 3000, it is not working with the previous scale of 2300. I don't understand either that if I pull the hatch disappear as well.

[pendean]

Your hatch pattern is created in inches.
Your file/you are drawing in mm.

1 inch = 25.4 mm

At a scale value of only 1 is will only appear as a solid blob until you zoom in real close (going by the experience of the dwg file you posted here).

What size stone are you trying to create in mm? the hatch pattern is defining a typical stone at +/- 1-inch high, or 25.4mm high. You need to know what size brick you are trying to create in mm, then scale it correctly by deviding your mm height with 25.4 (not just assuming 3000, or 2300, is correct).

[hugha]

That pattern template was drawn within a 6 x 6 square which might work for drawings where the base unit is inches. 

If your drawing units are millimetres then the stones themselves are of the order of 1mm or 2mm in size so scaling by (say) 100 up to (say) 300  should  allow the hatch to fill a real world area in a drawing using millimetres.  Scale the pattern by 0.1  if your drawing  uses metres .

hth,

Hugh Adamson

www.hatchkit.com.au

[steven-g]

When I look at your example drawing part of it looks fine! You have a hatched area just below the building facade with a scale of 190, and that to me looks to be in proportion to the rest of the drawing. I am presuming your drawing is in millimeters the front door is about 930 wide which is a standard metric door size, (actually it is 936.8565? which raises some questions on drawing accuracy). But this gives the masonry a course height of 190 (does that sound about right).

I would think that this pattern was created so that it can be scaled to match the actual average stone course height.

So how big do you expect the stones to be? or have you chosen this pattern to represent something else?

[Anonymous]

Morning Pendean,

Thanks for the clarification. I think I understand what you mean now, but it does not work. I guess that 200 mm average high would work for my drawing so the scale factor should be around 8 right? It just get empty as if it wasn't hatch.

I have a pdf showing how it was before. So you can see it was working previously, it just I don't remember the scale, although i think it wouldn't work at that scale either now. One day I opened the drawing and I couldn't see the hatch like on the drawing below again.

[Anonymous]

Morning Hugh,

Thanks for replying to my post.

Under a scale of 3.6 the hatch looks like solid it only becomes visible at 3200 scale but that is to big for my drawing as the stone looks completely disproportionate as you can see on the previous screenshots.

This how it look liked before the scale decided to change one day like 2 weeks ago. I don't understand why it was working before and no anymore. I didn't do anything. Just closed the drawing after work one day and the day after the stone "was gone".

[Anonymous]

Morning Steven,

Thanks for replying to my post.

The reason why the door is that size is because it is matching the size of an existing door from long ago as part of the job I am working on, there is a listed old building on site and we have to keep some of the features of the property. Anyway, yes, the masonry a course height should be around 190 as my drawing below shows. I can't get that pattern at that scale anymore.

[cadffm · Accepted solution]

Your Problem is: The Hatch with your wanted pattern&scale incl. too many lines!

Set hpmaxlines higher and you can go down with your scaling.

[cadffm]

The real problem is the (too) massive pattern definition.

[Anonymous]

Brilliant!!!! It worked!! Thanks a lot!! 🙂 It was set at 10000 I put 10000000 now and works!! Will this affect the rest of my hatches or drawing? The scale I've used for the drawing below is 320. I have no idea of that command existed of what it was for, not even sure now to be honest. I won't forget it when I have hatches problems like this one.

[Anonymous]

Thank you for all your replies!! I learned a bit more about CAD stuff in the meantime. You guys are real experts!! Thanks for your help!! 🙂

[pendean]

empty? Since your posted DWG file was not "empty" where the hatches are, perhaps that is your problem, its not the hatch or hatch pattern, but your DWG file.

Start a new blank file and hatch there. Does it work? or is it still "empty"? Probably not. So INSERT your problem DWG file into this new blank file where everything works and explode it. You'll now probably see all those hatches you've been trying this whole time.