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! > MetalWorking Machines > Bridgeport and Hardinge Mills


Bridgeport and Hardinge Mills Discuss Bridgeport and Hardinge Mills here!


This forum is sponsored by:

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Ban this user!
Old 01-30-2011, 04:36 PM
 
Join Date: Feb 2008
Location: usa
Posts: 10
edsgarage is on a distinguished road
Exclamation Boss 6 Mispositioning

I have a Boss 6 series I machine.
I would like to know if anyone knows the correct dip switch positions on the ZCK board.
I have part of a manual and it describes the alignment procedure for this board.
In the procedure it says to set the dip switch to sw 1 to on sw 2 to off.
The machine was left in this condition.
The machine runs but if you set the frequency and voltages to spec it will misposition when driving in X and Y simutaneously.
You have to run the drive voltage all the way down and lower the frequency to get it to position correctly
If you run the axes individually in rapid it will position OK.
It seems from the schematic that both switches should be in the off position for running.
However when I do that the machine will not run at all.
If anyone has any ideas I would be grateful.
Also if anyone has a full manual please let me know.

Thanks,

Ed
Reply With Quote

  #2  
Old 02-01-2011, 08:02 PM
Moderator
 
Join Date: Nov 2004
Location: USA
Posts: 2,856
machintek is on a distinguished road

When I get to my office, I can check and see if I have any data on that. If you search my responses concerning stepping motors you can get more detail including a tuning cheat sheet. In a nutshell these motors lose their permanent magnetic fields with age and heat. Thus they have less torque and stall easier. By lowering the rapid rate, to flatten out a bit the acceleration curve (more time to achieve speed) and thus minimize stalling. Also to check would be the AC voltage going to each drive section and DC voltage while running a loop of a 45 degree move with the X and Y axis. You may have a voltage drop under load. Also to check would be static DC current and what final drive transistors that are in your machine. The BOSS 6 steps in .0005 inches thus requiring twice the pulses of a previous BOSS machine.

George
__________________
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
Reply With Quote

  #3   Ban this user!
Old 02-03-2011, 07:06 PM
 
Join Date: Feb 2008
Location: usa
Posts: 10
edsgarage is on a distinguished road

Hi George,
Thanks for the info.
I did check the motor current (static) and set all axis to spec on the ACC board.
The voltage on the DC side drops about 2V when in rapid.
On a failure it never finishes the count in the Y axis.
I am only able to run the machine in what appears to be the alignment mode.
That is with The DIP switch set to 1 ON 2 OFF.(ZCK board schem sht 1)
If I try to run it with the DIP switch positioned to 1 and 2 OFF as it appears in the schematic the axis will not run nor will the display count to the programmed position.
If after it mispositions, you force it to go to zero again, it will count down to zero but The y axis zero is off
There is an alignment procedure I need to try on the ZCK board.
There are null, accel/decel, frequency(16khz) and a voltage to frequency converter adj.
Would a misaligned ZCK board cause it not to run with the DIP switch set to the position in the schematic?
I have not seen the motor stall but would a deteriorated magnetic flux cause the axis to not finish the count?
I have had experience with bad motor flux (X Axis motor which I replaced) and it would finish the count but I would hear a whine from the motor when it failed.
The drive transistors are 2N6547.
I tried switching the SMD boards to see if the problem followed the original Y axis SMD board but the miscount stayed in Y

Thanks Again,

Ed
Reply With Quote

Reply




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
easy boss w/ fair wage or diffcult boss w/ high pay? Chipload Polls 17 06-11-2008 07:19 AM
Homing boss 8 or boss 10 wcarrothers1 Bridgeport and Hardinge Mills 9 06-05-2008 08:06 AM
Boss 10 wcarrothers1 Bridgeport and Hardinge Mills 2 05-17-2007 12:23 PM
Boss 9 Boss 10 parts swop Drewboy Bridgeport and Hardinge Mills 1 03-29-2006 10:16 PM
Please Help With Boss 5 MrHorsepower Bridgeport and Hardinge Mills 3 07-13-2005 09:28 PM




All times are GMT -5. The time now is 04:38 PM.





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