Messages

71

General Mach Discussion / Re: Homing switches - optical?

« on: April 11, 2018, 11:02:03 AM »

Plenty options - very common

https://www.ebay.co.uk/itm/New-LJ12A3-4-Z-BX-Inductive-Proximity-Sensor-Detection-Switch-NPN-DC6-36V-4mm/122206045078?hash=item1c740c4396:g:hJkAAOSwdzVXuulS

for example.

need to choose NPN, PNP etc as needed.

Is this on a stepper drive machine?

The problem being that most mach 3 BoB's are 5v for the limit switches and all the proximity switches start at 6v.

It is a stepper at present.

thanks

72

General Mach Discussion / Re: Homing switches - optical?

« on: April 11, 2018, 09:44:14 AM »

I would go for inductive proximity sensors myself, pretty accurate if setup right and not so prone to dust/swarf etc as optical

Sounds good - got a link to any?

thanks

73

General Mach Discussion / Re: Homing switches - optical?

« on: April 11, 2018, 09:43:31 AM »

Hi,
I use roller plunger microswitches for homing and get repeat accuracy of 0.02mm.

http://nz.element14.com/honeywell/bzc-2rq18-a2/switch-basic-top-roller-plunger/dp/1525198

What kind of mechanical switches are you using?

Craig

I am using roller plunger switches - tried loads and not getting that sort of accuracy.

Rim

74

General Mach Discussion / Homing switches - optical?

« on: April 11, 2018, 07:52:22 AM »

I have been using Mach3 a while now and realised that the mechanical homing switches are terrible. I would liike to swap them to a more accurate version, I hear optical is a good option, although they do require and extra wire and perhaps a little circuit?

Has anyone got any insight on this? Does anyone make Opto units complete and ready to go?

thanks
Rim

75

Bargain Basement / Re: 2 x UC100 USB motion controller (UK Only)

« on: September 04, 2017, 01:04:13 PM »

I will PM you

Cheers

BTW it comes with an upgraded/shielded USB cable with ferrites 

76

Bargain Basement / Re: 2 x UC100 USB motion controller (UK Only)

« on: September 04, 2017, 12:27:32 PM »

Thanks for the offer, however I feel £50 inc recorded postage is a fair price - so respectfully I must decline.


Regards

77

Bargain Basement / Re: 2 x UC100 USB motion controller (UK Only)

« on: September 04, 2017, 11:17:40 AM »

Strangely, I was just giving the workshop a good clear out yesterday and came across one.

So - yes 

78

General Mach Discussion / Mach3 turn auto screen loop increment counter???

« on: March 13, 2017, 02:51:08 PM »

Mach3 turn auto screen loop increment counter???


On the auto screen (see pic attached) there is a loop counter. Is there any way to increment it when using a M98/99 loop?

e.g.

Code: [Select]


M98  P001 L43  ( -86MM - START AT Z0 )
G0 Z50.0
G0 X50.0
M5
M9
M30

O001
( Incremet loop counter here ???????)
G91 Z-2.0
G90
G1 X37.0
G0 X42.0
M99
%

When the above code runs I would like the loop counter to update so I know which increment I am at.

or

Is that not what this counter is for?

thanks
Rim

79

G-Code, CAD, and CAM discussions / Re: G76 threading problem

« on: January 04, 2017, 07:32:41 AM »

Preference here is to have  the threading macro set for G32 code generation since  it has never given me a problem.

RICH

How do you set that it to G32?

thanks

80

Bargain Basement / 2 x UC100 USB motion controller (UK Only)

« on: August 04, 2016, 09:05:50 AM »

For sale 2 x UC100 USB motion controller. Used but fully 100% working with no defects and updated to latest firmware. Surplus to requirements.

Sold WITHOUT Usb cable (uses Mini USB - not micro usb)

https://www.cnc4you.co.uk/UC100-USB-Motion-Controller

£50.00 each including first class recorded delivery (Posted to the UK only) - or £90 for both.

Grab yourself a bargain.