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Messages - Kristin D

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General Mach Discussion / Re: Basic initial setup question
« on: August 21, 2008, 05:27:31 PM »
OK I have watched the flash video of homing,limits and offsets three times, on the second and third I went to the other machine and entered what I thought I needed, now it's telling me I am outside of the soft limits and can not invoke the setting. Here is what I did, I ran the Z up to 1/4" of the top, the X all the way plus and the Y all the way plus, measured with a rule to get the range entered 9.75 for X max, 4.25 Y max and 5.0 Z max. zeroed the axis and ran them to the other end by jogging (which should be 0,0 XYZ) then zeroed again in Machine cordinates. Moved the table and switched to program cordinates, and zeroed again. Must be missing something real simple here.


General Mach Discussion / Re: Basic initial setup question
« on: August 21, 2008, 02:43:39 PM »

Thanks again, who would have thought of shift and mouse to zoom the window, now off to try and set up the limits!


General Mach Discussion / Basic initial setup question
« on: August 21, 2008, 01:18:45 PM »
I finally got my new leadscrews and steppers installed on my Taig mill, using a HobbyCNC Pro controller board w/205 Oz motors, got the motors tuned to provide the correct distance (duhh, after I realised that the controler was set for 8 microsteps). Now here is where I start getting confused between machine and work cordinates, I was able to write a bit of g-code to drill holes for the heatsink for my driver chips and was a little confused when I started out at the lower left corner and the machine moved to the lower right before starting! It worked out fine but I was not expecting the lower right as a start point, good thing I did a little "air cutting" first to see where it went.

Now I would like to activate the home/soft limits, I tried by entering 10" and zero for X with a .25 zone and it didn't seem to work at all (xml. attached) Do I need to edit the G28 box too? I still have not installed any physical home switches as I wanted to use the mill to make the brackets and am still between using micro-switches or optical slotted ones. Should I just wire a pushbutton and move the table with the jog keys to where I want home and fake it?

I ran one dxf through lazycam and it partly worked, I think I worked out why the circle was an elipse though as I didn't clean the dxf first. I am slowly finding all the little tweeks such as being able to direct enter to the DRO's and set scale (Is it obvious I didn't RTFM? got to take that to the printer and get it run off and bound).

Is there a way to zoom in on the toolpath window, all I see is a tiny flyspec in the center, no way to see what is going on.

Well that is enough of my rambling for now, sure I'll have dozens of more questions soon.


General Mach Discussion / Re: "Capacitive" Encoder
« on: August 19, 2008, 04:55:40 PM »
The data sheet lists the number of ppr and rpm as :
Max RPM Resolutions
7500 RPM 2048, 1000, 800, 384 (plus res. from 15k and 30k RPM)
15000RPM 1024, 500, 400, 192 (plus res. from 30k RPM)
30000RPM 512, 250, 200, 96; 256,125, 100, 48

Although I have to wonder how those plastic hubs stand up to 30000 RPM.


General Mach Discussion / Re: "Capacitive" Encoder
« on: August 18, 2008, 09:08:16 PM »
Can's see why they would not work well, provided they can take the abuse and have sturdy construction. Where or who is making them?


General Mach Discussion / Re: Homing Order?
« on: August 15, 2008, 03:43:57 PM »

Does it have a little brother or sister that needs a home?


General Mach Discussion / Re: Keyboard connectors
« on: August 08, 2008, 04:24:00 PM »

Not that Dave the other Dave? Well Dave if you can't find keyboards I can take a look through my junk pile and probably come up with one or two with the big din connectors. Yours for the cost of shipping.


General Mach Discussion / Re: Keyboard connectors
« on: August 07, 2008, 04:12:39 PM »
Radio Shack used to sell them but last one I bought was several years ago and about $8! Better to search for old keyboards with the bigger plug, garage sales, fleamarkets usually have them for a buck.

Kristin ;D

« on: August 02, 2008, 03:01:11 PM »
I got my shielded wire from allelectronics.com 22GA 5 conductor with a ground and foil shield was pretty cheap/foot. stock # 5CS22, I bought 100' but you can buy 1' to 500'


General Mach Discussion / Re: Minimum operating system?
« on: July 29, 2008, 10:18:01 PM »
That's what I thought, well all I have is 98, ME, NT and XP. Still trying to reinstall XP, the whole process is to build some circutry to convert 3.3V to 5V and from the looks of things I may need to drop back to DOS and whatever CNC software as it's just a test thing and all I need is to be able to toggle the printer port.


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