Messages

301

General Mach Discussion / Re: Lathe Turn wizard question

« on: January 22, 2008, 05:33:00 PM »

thanks Thats exactly what I was hoping for

302

General Mach Discussion / Re: Lathe Turn wizard question

« on: January 21, 2008, 11:37:36 PM »

The OD Turning wizard is the one I am referring to.  On most parts I turn I do start off the end of the stock in Z+ but a few things I have turned recently , like AK gas pistons and today a large mortar bbl have had a somewhat wasp-wasted profile and I need to start in the part somewhat. Some of the firing pins I turn are rather small in diameter and I have to support the end away from the chuck with a live center and start turning Z- of the end of the stock to leave a short portion of the original stock for the live center to bare against, Simply not possible to start off the + end of the stock. When the tool plunges into the work piece at 150 IPM in rapid it causes the part to deflect , this wouldn't be to big a problem if there was a dwell or pause before the movement in the z plane to allow the tool time to remove some stock but the way it currently works it rapids in to the cut depth and them instantly begins to travel in the z- direction. When this happens the part just deflects and ends up larger in diam away from the chuck than closer or just breaks the tool.

My thought was for the x axis to rapid (G00) in as long as the Z start value is + and feed in at a user definable value (G01 F**) if the Z start is negative , Maybe what I am looking for exist in one of the other wizards, unsure, but it does seem it would be a useful addition to the OD turn wizard since it not feasible to rapid in on the x axis in every situation

303

General Mach Discussion / Lathe Turn wizard question

« on: January 21, 2008, 09:39:52 PM »

WHen I generate code with the the lathe turn wizard the infeed of the x-axis to the cut depth is a G0 command which is just fine when the tool is out beyond the end of the stock (Z+** ) But when the z start point is a Z negative value it would be nice if the wizard would generate the x axis infeed line as a G01 instead of G00 ., It would also be nice if the x ais infeed speed could be specified as a seperate value from the z axis feed value. On short files I have just been editing this manualy but today I generated a file to cut profile a large mortar bbl thats aprox 4000 lines with almost all the x axis infeed commands being at a z negative position. Is this an easy option to add to the turn wizard? thanks

304

General Mach Discussion / Re: steps per 360 degree revolution.

« on: January 21, 2008, 07:13:40 PM »

its been a couple of years since I set mine up , but if memory serves heres how I calulated mine , 8" rotary table with servo motor, was to detirmine the ratio of the worm gear that drives it, in my case its 30 to one. 30 revolutions of the input shaft results in one full rotation of the table. I then have a timing belt (gatesXL .2 pitch) reduction  of 3 to 1. at this point it takes 90 revolutions of the motor shaft to turn the table 360 degrees I cant remember the encoder count but lets guess its a 500 cpr qaud encoder and takes 2000 pulses to move the motor shaft one revolution  . this works out to 180,000 pulse for one 360 degree revolution , 180k devided by  360 eqauls 500 steps per degree . In motor setup I just entered 500 steps per unit .

305

General Mach Discussion / Re: Tool Change

« on: January 20, 2008, 08:23:41 PM »

I dont put the g43 in the tool change line on any of my machines , just T0101 m6 for the lathe , t1 m6 for the mill and dont have any problem with offsets. M6 is the std callout for tool change wether its being done manualy or with a changer, not familiar with a cnc machine that does tool changes with just the T* command and no M6 . My Milltronics machining center sees an M6 with no T callout afterwards and just stops the spindle, and raises the head  waiting on a manual tool change. If am running a file with T1 and , 1/4" mill , and then call out T2 (3/8" mill) without the M6 behind it the machine will not stop for a tool change and will continue to run the file with the 1/4" mill

306

General Mach Discussion / Re: Spindle Motor Inverters

« on: January 16, 2008, 08:19:15 PM »

I am running a 2 hp inverter on my 14x40 lathe with 6" chuck and with resistor can stop from 1000 rpm in about .8 second with no belt slip , any faster and the chuck will occasionaly unscrew

307

General Mach Discussion / Re: feed hold switch question

« on: January 10, 2008, 09:02:21 PM »

many thanks , works perfectly

308

General Mach Discussion / Re: Breakout Board

« on: January 10, 2008, 08:57:04 PM »

I have been very pleased with the break out boards from CNC4pc also, I am currently using the c11 in two machines, a mill and a lathe, and have one of his $25 breakout boards on my other lathe.

309

General Mach Discussion / Re: feed hold switch question

« on: January 10, 2008, 11:24:35 AM »

How do I enter the value of 1000 in the hotkey window? When I click on it I get a popup that says press any key to asign , as soon as I hit 1 on my keyboard it enters 97 , cannot just type 1000 in directly , I assume its linking the 1 key  to that function

310

General Mach Discussion / Re: feed hold switch question

« on: January 10, 2008, 09:26:28 AM »

I have been watching the setup video and have looked thru the pdf file and I am not quite sure where the oem code is placed. I have my cycle start and feed hold switches installed and assigned to the proper pins in ports and pins input , just not sure what the next step is.