Messages

291

Show"N"Tell ( Your Machines) / Re: My new project

« on: January 28, 2010, 02:08:10 PM »

I feel your pain about flaky problems, the PC I had running my smaller BP CNC Mill went down.  Not big deal, just save off the data and replace the PC, right?  It took a month to get it working again, the parallel port had different impedance, so some of the inputs would trip randomly.  After a rewire with a new breakout board,  shielded cables and only grounding one side of the cables to a common ground, things are better than before!

Try breaking it down into small pieces and function test each one, then integrate them together slowly and methodically while testing each system along the way.

On my big VMC that I working on in my spare time, I am using Modbus to the control the spindle and monitor the spindle load.  Modbus is great!  
http://www.machsupport.com/forum/index.php/topic,13365.0.html

Keep posting...  

JH

292

Show"N"Tell ( Your Machines) / Re: My new project

« on: January 27, 2010, 12:18:19 PM »

Thanks for the compliments Monty! 

I am watching your build to learn as much as I can about lathe conversions, as I plan to convert this SL1 to Mach3 someday…

JH

293

General Mach Discussion / Re: rolling to a new computer

« on: January 27, 2010, 12:00:05 PM »

Don't forget any custom/modified bitmaps if your screens have been modifiyes too.

JH

294

Show"N"Tell ( Your Machines) / Re: My new project

« on: January 25, 2010, 10:08:35 AM »

Nice test cut.  Can't wait to see more parts being cut.  Great looking Lathe.

JH

295

General Mach Discussion / Re: Would like opinions on servo motor voltage and PS secondary in series

« on: January 22, 2010, 04:53:36 PM »

The servo drive will limit the amps to whatever I set it at up to 35amp max. The drive is rated to 160V.

Steve,

Servo motors will run at max RPM when the rated voltage is applied.  If your servo driver is PWM (dugon 160V 35A), your PS output voltage does not have to match your motors max voltage rating, the PS out can be more, then you set the max PWM parameter on the driver so average RMS voltage to the servo motor is not more than the motors rating.

JH

296

Show"N"Tell ( Your Machines) / Re: 1987 Bridgeport Production Center Interact 412 to Mach3 Conversion

« on: January 17, 2010, 09:09:44 PM »

How are you controlling the spindle orientation with your VFD, so that the tool change can take place?

The plan is to us the stock spindle orientation sensors with Mach3 to signal the VFD when to stop. 

During a tool change the spindle speed will be set to a slow speed ( maybe 50 RPMS), then Mach3 will monitor the Spindle Home Sensor and count n number of pulses from the orientation encoder before signaling the Spindle to Stop.  While the Spindle is stopping and slowing, Mach3 will continue to count to verify the Spindle is in the correct position.  If its not in the correct position, these steps will be repeated until its correct, up to 3 times or so before generating an error and stopping.

I might even add some code to automatically adjust the triggering point to teach Mach3 with to signal the Spindle to stop during each tool change.

However, this is only the plan....  I have not tried it yet.

Ideas are welcome

Thanks,
JH

297

Show"N"Tell ( Your Machines) / Re: My CNC pressbrake build

« on: January 16, 2010, 06:05:30 PM »

looks great, are you making the dies too ?

JH

298

Show"N"Tell ( Your Machines) / Re: My Balding Beaver

« on: January 11, 2010, 09:31:09 PM »

Hood, 

If anyone can get it repaired correctly, its you....  No worries

JH

299

Show"N"Tell ( What you have made with your CNC machine.) / Re: Engine Mounts

« on: January 08, 2010, 02:48:39 PM »

Nice Work Monty

300

General Mach Discussion / Re: CNC4PC C11G Analog Output Spindle Control

« on: January 06, 2010, 05:21:32 PM »

1- The VFD I am using ( a 15HP GS3 from automation direct) has an analog output supply of 10V at 20mA max.  The C11G has a required input of 12V @50mA.  Do I really need another isolated power supply?  I feel like I have about enough in that control panel...  24VDC, 24VAC, 12VDC for the drives, 60VDC for the servos, and on and on.....

Doesn't the GS3 have RS485 ModBus?  Try controlling the RPMs/Hzs via Modbus.  You should be able to the achieve the target RPMs with no problems...

We use ModBus to control our 10HP Spindle

<a href="http://www.youtube.com/v/QUB8hFWrnfw&amp;hl=en&amp;fs=1&amp;rel=0&amp;color1=0x006699&amp;color2=0x54abd6&amp;border=1" target="_blank" rel="noopener noreferrer" class="bbc_link bbc_flash_disabled new_win">http://www.youtube.com/v/QUB8hFWrnfw&amp;hl=en&amp;fs=1&amp;rel=0&amp;color1=0x006699&amp;color2=0x54abd6&amp;border=1</a>

JH