Still a newbie - having some issues with holes and pockets
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Still a newbie - having some issues with holes and pockets
Hi once again.
I'll start by saying - I'm learning. I'm getting farther and farther with things, and then hit a wall. I've searched the forum, and can't seem to find anything that describes my problem in a way that helps me.
I'm creating a part that is screwed to a two by four, and has a sliding part that holds the top of a wheelbarrow against the garage wall. At the bottom, a bracket holds it against the wall there. There will be a sliding part that is pulled down toward the ground by a spring in a pocket on the base.
I was able to create the profile I wanted using the YZ plane, to fully constrain it, and to extrude it to 127mm. I have holes running from one end to the other to hold end caps.
The problem comes in when I try to cut holes in the top face (highlighted in green in the picture below)
I need a couple of countersunk holes (4mm w/8X3.5mm countersink) and a channel for a spring to sit in. When I highlight one of those faces, and then click on hole in part design, I can adjust everything all I want, but no holes or pockets appear.
I've tried creating a new sketch, and put the holes on X-Y, and they show up on the underside of the model, but no matter what I do, I can't make a pocket or hole appear.
Of course, later, I'm going to have to figure out how to use this as a "template" for the slider's profile. Another round of searching will commence then.....
I know I'm not understanding something about the environment, or how FreeCAD accomplishes things, but I'm beating my head on the wall, and any helpful pointers in the right direction would be greatly appreciated.
Thanks,
Andy
OS: Windows 10 Version 2009
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24267 +148 (Git)
Build type: Release
Branch: Branch_0.19.4
Hash: 476ecf091941bead59b14e44afa6064d5a66afa3
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.3
Locale: English/Canada (en_CA)
I'll start by saying - I'm learning. I'm getting farther and farther with things, and then hit a wall. I've searched the forum, and can't seem to find anything that describes my problem in a way that helps me.
I'm creating a part that is screwed to a two by four, and has a sliding part that holds the top of a wheelbarrow against the garage wall. At the bottom, a bracket holds it against the wall there. There will be a sliding part that is pulled down toward the ground by a spring in a pocket on the base.
I was able to create the profile I wanted using the YZ plane, to fully constrain it, and to extrude it to 127mm. I have holes running from one end to the other to hold end caps.
The problem comes in when I try to cut holes in the top face (highlighted in green in the picture below)
I need a couple of countersunk holes (4mm w/8X3.5mm countersink) and a channel for a spring to sit in. When I highlight one of those faces, and then click on hole in part design, I can adjust everything all I want, but no holes or pockets appear.
I've tried creating a new sketch, and put the holes on X-Y, and they show up on the underside of the model, but no matter what I do, I can't make a pocket or hole appear.
Of course, later, I'm going to have to figure out how to use this as a "template" for the slider's profile. Another round of searching will commence then.....
I know I'm not understanding something about the environment, or how FreeCAD accomplishes things, but I'm beating my head on the wall, and any helpful pointers in the right direction would be greatly appreciated.
Thanks,
Andy
OS: Windows 10 Version 2009
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24267 +148 (Git)
Build type: Release
Branch: Branch_0.19.4
Hash: 476ecf091941bead59b14e44afa6064d5a66afa3
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.3
Locale: English/Canada (en_CA)
- Attachments
-
- Top Lat(Base) - YZ Extrude.FCStd
- (22.94 KiB) Downloaded 24 times
"I have noticed even people
who claim everything is predestined,
and that we can do nothing to change it,
look before they cross the road."
Stephen Hawking
who claim everything is predestined,
and that we can do nothing to change it,
look before they cross the road."
Stephen Hawking
Re: Still a newbie - having some issues with holes and pockets
To make holes with this tool you need a sketch with circles located where the holes should be placed. Their size doesn't matter, just the location is important. Check the wiki page for the Hole tool: PartDesign Hole.
Last edited by NewJoker on Sun Aug 07, 2022 9:31 pm, edited 1 time in total.
Re: Still a newbie - having some issues with holes and pockets
Make the sketch a 1/2 inch above the XY plane, then use the hole feature followed by a pattern.....
Re: Still a newbie - having some issues with holes and pockets
Thank you! I was thinking backwards about it.
I also rounded the "anti-twist" channels.
Onward and upward!
"I have noticed even people
who claim everything is predestined,
and that we can do nothing to change it,
look before they cross the road."
Stephen Hawking
who claim everything is predestined,
and that we can do nothing to change it,
look before they cross the road."
Stephen Hawking
Re: Still a newbie - having some issues with holes and pockets
If you give the 1/2 inch constraint a name, you can use it in an expression to make the following sketch parametric.....
To transfer the holes think about using shapebinders.
To transfer the holes think about using shapebinders.
Re: Still a newbie - having some issues with holes and pockets
Thanks. Yours, combined with the other answer got me to the point where the relationship between the sketch, the model, and the tools is clearer.NewJoker wrote: ↑Sun Aug 07, 2022 9:30 pm To make holes with this tool you need a sketch with circles located where the holes should be placed. Their size doesn't matter, just the location is important. Check the wiki page for the Hole tool: PartDesign Hole.
After I got the holes, it was easy to create the spring pocket.
Andy
"I have noticed even people
who claim everything is predestined,
and that we can do nothing to change it,
look before they cross the road."
Stephen Hawking
who claim everything is predestined,
and that we can do nothing to change it,
look before they cross the road."
Stephen Hawking
Re: Still a newbie - having some issues with holes and pockets
I get the naming constants thing now. It’s like defining I/O pin 2 on an arduino as “LED”. I address LED in the program, and if I change what pin it is defined to, every reference in the program is changed automatically.
Thanks!
"I have noticed even people
who claim everything is predestined,
and that we can do nothing to change it,
look before they cross the road."
Stephen Hawking
who claim everything is predestined,
and that we can do nothing to change it,
look before they cross the road."
Stephen Hawking
- Shalmeneser
- Veteran
- Posts: 9560
- Joined: Wed Dec 23, 2020 12:04 am
- Location: Fr
Re: Still a newbie - having some issues with holes and pockets
Your sketch is ... awfull :
* Don't repeat the same dimension : use geometrical constraint
* Do not try to do everything in ONE sketch : Keep it stupidly simple
* Don't repeat the same dimension : use geometrical constraint
* Do not try to do everything in ONE sketch : Keep it stupidly simple
- Attachments
-
- Capture d’écran 2022-08-08 021656.jpg (85.42 KiB) Viewed 1078 times
-
- Top Lat(Base) - YZ Extrude_SHALM.FCStd
- (40.89 KiB) Downloaded 21 times
-
- Capture d’écran 2022-08-08 023519.jpg (47.76 KiB) Viewed 1078 times
Re: Still a newbie - having some issues with holes and pockets
Not surprised by your evaluation. I think one of my main problems is using constraints properly. I really have trouble figuring it out when I have a couple unconstrainded and am not sure how to proceed a lot of the time. Not sure what it’s complaining about.Shalmeneser wrote: ↑Mon Aug 08, 2022 12:36 am Your sketch is ... awfull :
* Don't repeat the same dimension : use geometrical constraint
* Do not try to do everything in ONE sketch : Keep it stupidly simple
"I have noticed even people
who claim everything is predestined,
and that we can do nothing to change it,
look before they cross the road."
Stephen Hawking
who claim everything is predestined,
and that we can do nothing to change it,
look before they cross the road."
Stephen Hawking
- Shalmeneser
- Veteran
- Posts: 9560
- Joined: Wed Dec 23, 2020 12:04 am
- Location: Fr
Re: Still a newbie - having some issues with holes and pockets
Look at the lecture in chrisb signature : https://forum.freecadweb.org/memberlist ... ile&u=5646
Try to begin with geometrical constraints :
* vertical, horizontal
* equality
* symmetry
* points on line
You can use construction lines (blue) to help you.
Moving lines, it must keeps its global form.
THEN dimension constraints :
* vertical, horizontal, radius
If you use twice the same value, do we need equality ?
Dimensionning regarding to the origin changes the color of the constrained lines.
Try to begin with geometrical constraints :
* vertical, horizontal
* equality
* symmetry
* points on line
You can use construction lines (blue) to help you.
Moving lines, it must keeps its global form.
THEN dimension constraints :
* vertical, horizontal, radius
If you use twice the same value, do we need equality ?
Dimensionning regarding to the origin changes the color of the constrained lines.