Messages

1

FAQs / Re: accuracy

« on: January 06, 2013, 04:53:17 AM »

Problem sorted the probe is 2 mm + the insulation so need an offset of 1.5 and the drill is not quit 2mm it's just under.
Helps writing things down.
Dam wife's unpacking.

2

FAQs / accuracy

« on: January 06, 2013, 04:35:30 AM »

I am CNCing a sx2 mill and have an annoying problem with accuracy.
The mill has been roughly converted using the stock metric screws.
A pice of work marked out for 3 holes and punched then put into vice.
The punch marks are roughly at the points of a triangle on the face of the work.

Mach 3 steps has been set using a digital calliper mounted to the mill using brackets
Same calliper for marking the work
Check the callipers against a micrometer.
Check gibs.
I'm using the blue screen for mach3 as it has a touch off gadget.
I have mounted a 2mm drill ( isolated from the mill with shrink rap) in the collet then touched off the work left and front and zeroed the DROs.
Using the MDI screen entered the x y coordinates + 1mm for half the diameter of the touch off tool.
tool  moves but is short from the punch mark  in both the x and the y.

Calliper mounted to the table confirms the DROs movement and distance.
 manually jog the tool to the punch mark Read the DROs repeat for all the punch marks.
On average   The y is 1.2680 short and the x is 0.7 short
Manually set 0 x and y  from the left and fount of the work In case it's back lash  retest SAME.
up grade the machine with 1605 ball screws nuts and mounts.
Re calibrate machine for the modifications using the same callipers.
Repeat all of the above and it's the SAME.
Wifey is packing bags dogs are hiding in bedroom.
I'm missing something !!!!!!!!!!!!!


 



 

3

FAQs / Re: Mach3 cannot see input ports

« on: September 06, 2012, 06:55:05 AM »

Sorry forgot to reply to this. sorted the problem it was a bad connection on one of the connectors.

4

FAQs / Re: Jogging =DRO

« on: September 06, 2012, 05:22:02 AM »

don't use the themill.xml file its the wrong one also i i Am using the blue screen version so my xml file won't work withthe original mach screen may be that's the problem .

5

FAQs / Re: Jogging =DRO

« on: September 06, 2012, 04:34:03 AM »

Morning  i was referring to the tool. attached is the xml file.

Thanks

6

FAQs / Re: Jogging =DRO

« on: September 05, 2012, 04:47:31 PM »

If I do this http://www.youtube.com/watch?v=XkO5tc-jSxw&feature=youtube_gdata_player I get a reading of 1066.9328 so I opend the  xylotex checked and it's 1/8 so my caclc of 200 x8 /1.5 is ok . If I go into MID and enter G0 X 152.5 the Quill moves 152.5 and the dro = 152.5 all ok . Now if I set jog to 0.010  and jog the Quill the Quill moves 0.010 but the dro 0.0102 0.0204 0.0306 what I was trying was this http://www.youtube.com/watch?v=buXHZ_McbOY&feature=youtube_gdata_player probably a gremlin

7

FAQs / Re: Jogging =DRO

« on: September 05, 2012, 02:49:06 PM »

The motors are 200spr I'm using a xylotex board set at 1/4 steps and using the existing sx2 screws which have a pitch of ?1.5mm when I test I get 1.5mm of travel when I rotate the Handel 1 turn. Now according to the info I have read I should enter 200 x 4 / 1.5 = 533 into the motor movement profile but if I use the steps per unit in settings over a distance of 152.5 mm it gives a setting of 1066.9328. Helps appreciated I'm missing something fed up of reading . Had a thought 200 x 8 / 1.5 = 1066.6667 checked the jumpers on the xylotex and thers a jumper across ms1 which should be 1/4 not 1/8 if I changed to 1/2 steps on the xylotex would that be a bad thing ?

8

FAQs / Re: Jogging =DRO

« on: September 05, 2012, 07:57:05 AM »

Ok so I changed the step to 0.0102 now I get 0.0102 0.0204 0.0206 each increasing by 0.0102 bit more reading and playing I thinks.

9

FAQs / Jogging =DRO

« on: September 05, 2012, 07:17:12 AM »

Hi I was watching the hoss video regarding backlash so basically set up mach3 the same jog step 0.0100 velocity 58% but when I jog I was expecting the DROs to increase in steps of 0.0100 but they increased 0.0102 0.0204 0.0306 0.0399 0.0501 restart 0.0000 0.0102 0.0204 0.0297 0.0399 0.0511 this happens on both X and Y each time I try, Some of the numbers will be different but not all. The motors are switched off.
Probably the reason I'm spending so much time making scrap instead of parts 

10

Video P*r*o*b*i*n*g / Re: Video Edge Finder

« on: June 26, 2012, 01:44:33 PM »

Don’t know If anyone is interested. This is the result using a 208c cmos cam and a usb easy cap. pic is a 0.004 feeler gage.