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Messages - Cartierusm

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261
Thanks. I'll do that this weekend.

262
Ok Himy, I understand what you're saying but help me clarify some things. I want the shield on each cable going to one lug on the metal body of the control box I have everything in. Now can I slide a copper wire up into the shielded cable as most of the shields are a foil, I think, then zip tie it so it has contact? If they have a drain wire for the shield then I'll just run off of those off course.

Now for the grounding of the power. Here are all my devices what wire should go to a ground location.

Main Power Supply -- It's a transformer so there are a ton of wires. Do I want to ground the actual ground coming off of the plug coming out of the wall? Then you mention bridging the grounds on the power supply, but there is only one 120V ground, or do you mean I should run the NEGATIVE from the DC side to a ground point on the metal cabinet?

Next I have 4 Stepper Drivers what wire do I use on those to ground? And which on the VFD Speed Control and BOB? And I have a 5VDC power supply coming in for the power on the BOB and for the Steppers, nothing is daisy chained. And I have a 12VDC Power Supply for the VFD Speed Control.

Thanks. Oh you said have all electrical grounds together, do you mean the NEGATIVE side of the DC goes to the same spot on the metal cabinet as the 120V GROUND?


263
General Mach Discussion / Re: Need HELP Steppers Stalling on Shallow Moves
« on: September 30, 2009, 01:17:23 PM »
Thanks Himy, I appreciate all the help. I understand what you're saying but might have a few questions, but right now I'm running the machine and actually making some money for once, but later today I'll study what you said.

264
General Mach Discussion / Re: Need HELP Steppers Stalling on Shallow Moves
« on: September 29, 2009, 11:36:41 PM »
Here are some pics. I use CPC Circular Plastic Connectors to hook up the Steppers to the electronics as I use the electronics for more than one CNC machine. I rewired it a few months ago and I had the problem before and after the rewire and all the other machines work fine.

265
General Mach Discussion / Re: Need HELP Steppers Stalling on Shallow Moves
« on: September 29, 2009, 11:23:41 PM »
I'm using a Keling Power Supply KL- 7220, Unregulated Power Supply 1440W, 72VDC/20A, I'm using it with 120VAC. It's on this page http://www.kelinginc.net/SwitchingPowerSupply.html. I'm using a CNC4PC BOB C10 http://www.cnc4pc.com/Store/osc/product_info.php?cPath=33&products_id=45. I'm using all shielded wire. I don't have the shield part terminated anywhere, but I don't get any noise problem otherwise. The Problem is not flaky it's pretty much static, if I run it too fast X and Y at the same time where the one of the axis is shallow and no load I get the problem at about 65 IPM, if I'm hogging out material then 30 IPM. Seems pretty consistent to me.

Himy I don't have a scope, but I might be able to borrow one, if I use a multimeter what would I be looking for and what would I run on my machine to test it?

266
General Mach Discussion / Re: Need HELP Steppers Stalling on Shallow Moves
« on: September 29, 2009, 07:35:18 PM »
OK Himy was kind of correct. This problem still exists, kind of. So I don't do any rapid moves during machining anymore, I stay at 20 IPM. But I noticed recently that the problem would present itself at 30 IPM if both the X and Y were moving at the same time, such as going around a corner at full chip load, so 1/2" endmill 30 IPM and 1/4" DOC. I believe the gibs to be adjusted accurately and both axis' are solid and move smoothly. I can't move the tables by pulling more than .001 - .0005 and it's certainly not binding. When the machine is off I can turn the ballscrews by hand and they are very smooth. The only mechanical fault I would see is maybe the steppers are not strong enough for this mill under full chip load.

So PLEASE HELP ME solve this problem. Specs: Keling 1200 oz./in. Steppers -- Direct Drive to Ball Screws -- Keling 8078 Drives -- 72 VDC @ 20 Amps Power Supply (The Steppers are set to 5.7 amps on the drives). At 150 IPM it can drag me across the floor without losing steps, but that's not a very technical test and a full load cutter might be more. Is there any way this could be an electronic problem with the drives or something? If it's not an electrical thing would I get more power from a 1810 oz./in. or 2830 oz./in. Stepper with the same 72VDC Power Supply? I'm asking cause I don't know how much more power at 20-50 IPM I would get from the other motors.

267
General Mach Discussion / Re: Simple Threading Wizard Problems HELP
« on: September 18, 2009, 02:47:15 AM »
OK, so I did some cutting today and I noticed that if there was the slightest drag it would do that taper cutting thing. I set my RPM at 1000 and cutting depth of .01 per pass and the threads came out silky smooth. I still don't understand why if the RPMs drag when cutting that it would start to make a taper cut and gall the threads, seems to be a pretty bad bug. Anyway, I'm fine with it now, I just won't be able to leave it alone while cutting threads for fear of the problem returning.

If anyone can tell me in the Mach Simple Threading Wizard what the relation of Depth of First Pass to Min. Pass Depth in the settings page? If change the Min Pass Depth in the settings page it changes the number of passes the program will make to complete the thread. If that directly controls the number of passes then why on the first page of the wizard does anyone care about the first pass depth?

268
OK, just wanted to make sure I wasn't going through a bunch of useless actions. Can you explain what this means, "persistent offsets or tool selections persistent chosen."

Also there are a lot of other functions on the tool table page, is there any better reference to what they do?

269
Hood, could be it's in feed per rev, but I'll be jogging all day long, then bam it won't go at 5 IPM as usual. Oh well.

As for the other thing, let's say I set a tool T808, then go to a turning wizard, post the code from the wizard, run the Gcode, then the code rewinds and defaults back to tool Zero. So the first time I ran a code with my new tool offsets and tried running it again the tool crashed bad as it thought tool zero was in the holder.

What is the difference, "persistent offsets or tool selections persistent chosen."

I read the Mach Turn Manual and was a little confused. Here's the way I set up permanent tool offsets in Mach Turn.

Put Tool 1 in the holder > MDI T101 > Make a facing cut > Goto Tool Table > Type 0 in Z Part Zeroing Coord. > Click Part Zero Z > Click Touch Z > Go back to the Manual Screen > Make a turning cut > Measure diameter > Goto tool table > Type in diameter in X Part Zeroing Coord > Click Part Zero X > Click Touch X

Then for other tools I just use MDI and type in the number, bring the tools to the x and z edge and enter the coords in the part zeroing coord box, but then only hit the Touch X and Z buttons.

Does that sound about right? I would do everything from the Tool Table window but I can't turn on the spindle from there and I haven't messed aroudn with the screens yet.

270
General Mach Discussion / Lathe Tool Offset and Program Rewind and G1 Help
« on: September 16, 2009, 10:33:57 PM »
OK so most of you will laugh but there was so much to learn on CNC lathe when I built it about 6 months ago I never bothered to use the tool offsets. One reason was that I tried using the tool offsets in DolphinCAM and they never worked so I was so frustrated that I never bothered to use them. So today I decided enough was enougn and I set up the tools in MACH, works good so far.

The problem I'm having is after I type in a tool, i.e. T808 and it asks me to hit cycle start and I do so, I go to mach wizards and run a program. Well for tool flex I usually always run a program twice, well this was a disaster as it reset the tool to tool 0 (zero) and it crashed so bad I had to reset my tool post.

So the question is how do I get it to keep the same tool after running a program?

Next question, for some reason every now and again Mach Turn stays in G0 mode. So let's say I'm going to cut G1F5Z-.5 it runs at full speed I have to restart Mach to get it to go normal. Is there any reason this happens? I have Mach3.42.

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