CNCzone.com-The Largest Machinist Community on the net!



Home Page Mark Forums Read Today's Posts My Replies Classifieds Reviews Photo Gallery Web Links Share Files Advertise With Us Ad List
Go Back   CNCzone.com-The Largest Machinist Community on the net! > Mechanical Engineering > T-Slot CNC building


T-Slot CNC building Discuss building machines using T-Slot systems.


This forum is sponsored by:

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #25   Ban this user!
Old 01-25-2012, 04:36 PM
 
Join Date: Sep 2005
Location: USA
Posts: 366
RTP_Burnsville is on a distinguished road

I like your router build thus far....... I have been sketching a similar build with a fixed gantry for a couple months so enjoy reading the updates. Looking at a 2 x 3 foot working size for what I had in mind so similar to yours.

Is it correct that you mostly used 120x40 aluminum profiles?

I have several sketches with both linear rails and also the supported rod style, it will be interesting to see how your selection works out.

Thanks,
Robert
Reply With Quote

Sponsored Links
  #26   Ban this user!
Old 01-25-2012, 10:04 PM
uspl's Avatar  
Join Date: Sep 2010
Location: Australia
Age: 48
Posts: 59
uspl is on a distinguished road

Hi Robert

Thanks for looking, I was beginning to think I was posting solo in this thread

Most of my frame is 80x40 with some 40x40 for trimming the table edges. Going to 120x40 would be overkill for this size project as far as I can see unless you have a cheap supply to use up.

If you would care to share your sketches i would be keen to see another perspective on the build; I am working through various ideas for the Z-axis right now.

Some of my latest ideas below.
Attached Thumbnails
Click image for larger version

Name:	4080-Complete CNC - Revised Z 20120126-1.jpg‎
Views:	84
Size:	46.1 KB
ID:	151077   Click image for larger version

Name:	4080-Complete CNC - Revised Z 20120126-2.jpg‎
Views:	65
Size:	37.8 KB
ID:	151078   Click image for larger version

Name:	4080-Complete CNC - Revised Z 20120126-3.jpg‎
Views:	64
Size:	44.7 KB
ID:	151079   Click image for larger version

Name:	4080-Complete CNC - Revised Z 20120126-4.jpg‎
Views:	66
Size:	57.3 KB
ID:	151080  

Reply With Quote

  #27   Ban this user!
Old 01-27-2012, 04:03 PM
 
Join Date: Sep 2005
Location: USA
Posts: 366
RTP_Burnsville is on a distinguished road

Hi,

Will see if I can pdf a couple of my sketches.... At the moment they are just pencil and paper drawings.

Are you going to have any racking issues with your gantry? For some reason the photos make it appear not as solid as the main frame.

Thanks,
Robert
Reply With Quote

  #28   Ban this user!
Old 01-27-2012, 09:52 PM
uspl's Avatar  
Join Date: Sep 2010
Location: Australia
Age: 48
Posts: 59
uspl is on a distinguished road

Hi

I don't expect to have issues with the gantry flexing or racking. It is not shown in the drawings but the gantry uprights are braced by 40x40 sections at a 45 degree angel both sides back to the base frame.

If I do get some movement, I have plenty of options to add stiffeners and further bracing including corner gusset plates at the back of the gantry cross member.

Look forward to seeing your sketches. My weather channel feed shows me it looks like a good day to be indoors in Burnsville and sketching. Down here it is just touching 100F in the shade, good day to clean up the workshop with a beer in hand.

Cheers
Reply With Quote

  #29   Ban this user!
Old 01-28-2012, 03:23 AM
 
Join Date: Dec 2007
Location: Australia
Posts: 364
aarggh is on a distinguished road

Hi David, great looking build mate, for more rigidity if the sides of the gantry are flush with the outside of the frame, a 1/4" triangle plate of aluminium or steel screwed to the frame and gantry sides would make it rock solid.

cheers,
Ian
__________________
My blog on the Jinan JCut 6090 CNC Router - http://www.cnczone.com/forums/blogs/aarggh/
Reply With Quote

  #30   Ban this user!
Old 01-30-2012, 04:26 PM
uspl's Avatar  
Join Date: Sep 2010
Location: Australia
Age: 48
Posts: 59
uspl is on a distinguished road

Hi all

Ian, comments noted, thanks for the kind words, and yes the outsides are flush so triangular brace plates can be added as needed. Once I get to the test cut stage I will review.

I got some stepper mount plates made up to suit, they came from a chat group contact who happens to be in Hawai; one week later they turned up USPS as nice as you like.

Fitted them last night, lovely job and they mate with the 8020 perfectly.
Attached Thumbnails
Click image for larger version

Name:	steppermotor_mounted_on_frame_182.jpg‎
Views:	40
Size:	21.6 KB
ID:	151534   Click image for larger version

Name:	motor_mount_plate_20_141.jpg‎
Views:	21
Size:	63.4 KB
ID:	151535   Click image for larger version

Name:	motor_mount_plate_10_162.jpg‎
Views:	30
Size:	72.6 KB
ID:	151536  
Reply With Quote

Sponsored Links
  #31   Ban this user!
Old 02-18-2012, 12:24 AM
uspl's Avatar  
Join Date: Sep 2010
Location: Australia
Age: 48
Posts: 59
uspl is on a distinguished road

Saturday afternoon update time.

I was stripping some old gear at work for the dumpster and salvaged a 19" rack mount case. Perfect to house the electronics for this project.

See images below.

I am open to some suggestions for cables between the motors and the controller boards. I want to have them as plugable so i can easily pull out the electronics box for maintenance as needed. The motors are running at 42vDC at about 3A. I need a four conductor cable, preferably shielded. I have read a few posts on using DIN or MIDI cables but wonder if they will handle the current load.

Comments from someone with an electrical background ?

Thanks

Images:
From the back, the RJ-45 sockets will connect to the home and limit switch wiring.

Look inside, lots of space for lots of cool air to circulate.


With the lid on and slid back on it's rails. Note the kill switch mounted on the front.
Attached Thumbnails
Click image for larger version

Name:	Rear View - Web.jpg‎
Views:	32
Size:	109.0 KB
ID:	153047   Click image for larger version

Name:	Top View Web.jpg‎
Views:	36
Size:	110.1 KB
ID:	153048   Click image for larger version

Name:	Front View Web.jpg‎
Views:	30
Size:	115.7 KB
ID:	153049  
Reply With Quote

  #32   Ban this user!
Old 04-09-2012, 04:44 AM
uspl's Avatar  
Join Date: Sep 2010
Location: Australia
Age: 48
Posts: 59
uspl is on a distinguished road
Sketchup files

Evening all

Attached herewith for you edification and enjoyment.
Sketchup files of some common parts I have done to create my build, thought they might be useful to someone.
Attached Files
File Type: zip Linear Bearings.zip‎ (61.9 KB, 4 views)
File Type: zip Rails.zip‎ (69.4 KB, 1 views)
File Type: zip Ballscrews.zip‎ (161.9 KB, 1 views)
File Type: zip Stepper Motor.zip‎ (134.6 KB, 2 views)
File Type: zip 8020 Profile Sections.zip‎ (74.2 KB, 3 views)
Reply With Quote

Reply

Tags
t-slot




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Yet Another 8020 CNC Build jsantos Open Source CNC Machine Designs 203 04-29-2012 04:14 PM
8020 t-slot size compatible with liner slide holes? HereinCS Linear and Rotary Motion 1 07-01-2010 02:29 PM
New Machine Build- 8020 build 3x5 sieg01 CNC Wood Router Project Log 30 03-17-2009 04:08 PM
Another 8020 build Micky15044 Open Source CNC Machine Designs 7 08-16-2008 09:45 PM
help - where to find 8020 t-slot alum landart DIY-CNC Router Table Machines 3 08-01-2003 08:45 AM




All times are GMT -5. The time now is 11:59 AM.





Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2012, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO
Template-Modifications by TMS

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361