Messages

4051

General Mach Discussion / Re: h-bot can mach3 run them?

« on: May 14, 2014, 03:12:09 AM »

can I run it with 4 motors 2 each side and simply wire them together

In the good old days when stepper motors were only operated in whole steps it was common to see two or more steppers wired together (either series or parallel) and driven by one controller chip.

Since the introduction of micro-stepping, modern stepper controllers are 'smart' and use emf feedback to control motor windings current when holding position – connecting two motors to one controller chip confuses the logic and it is now regarded as bad practice.

Tweakie.

4052

G-Code, CAD, and CAM discussions / Re: Help!UG output G-code always has problem in the Mach3

« on: May 14, 2014, 02:40:20 AM »

In line N0040 change the G90 to G91.1   Does this produce the desired toolpath ??

Tweakie.

4053

Show"N"Tell ( Your Machines) / Re: Vise for wood carving

« on: May 14, 2014, 02:21:03 AM »

Sounds really good - any chance of some pictures ?

Tweakie.

4054

G-Code, CAD, and CAM discussions / Re: HELP! Same code, different result

« on: May 13, 2014, 05:46:36 AM »

Hi Per,

Not that it is of any consequence but the I and J are the X axis and Y axis offsets for arcs as defined in the NIST interpreter specification.

Exactly how you know which IJ mode to select, I have absolutely no idea but each CAD / CAM has it's own preference and once known then that is the IJ mode to use.
I use 'trial and error' but I am sure others will have a better, foolproof, way to decide between G90.1 and G91.1.

Tweakie.

4055

G-Code, CAD, and CAM discussions / Re: HELP! Same code, different result

« on: May 13, 2014, 04:02:39 AM »

Hi Per,

In Config / General Config change the IJ Mode then regen. Toolpath.

(Ideally your generated GCode should contain the correct G90.1 (absolute) or G91.1 (incremental) dependant on how the arcs have been drawn in your CAD / CAM program).

Tweakie.

4056

General Mach Discussion / Re: New people welcome !! Come in here and introduce your self!

« on: May 13, 2014, 01:51:34 AM »

Hi Brent,

Welcome to the forum.

There are a number of posts relating to the Emco 5pc - perhaps these will be of interest to you - just add emco 5pc in the search box  http://www.machsupport.com/forum/index.php?action=search2

If you have any specific questions please post them as a new topic in the General Mach Discussion section where they will receive the best coverage.

Tweakie.

4057

Show"N"Tell ( Your Machines) / Re: DC-K40 Laser conversion issue

« on: May 13, 2014, 01:41:12 AM »

Hi Jeff,

I am not sure of your wiring setup so can't comment on your question.

What I am saying is do not use the spindle relay to switch the laser on / off by disconnecting the GND connection to the laser PSU.

Tweakie.

4058

General Mach Discussion / Re: Pc recommendations for Mach3

« on: May 12, 2014, 11:34:16 AM »

I would still like to use V-carve pro or even Rhino in the future on the computer while CNC is running sketching or drawing next project.

Hi Brooks,

Not a good idea. 
It is far better to have a dedicated machine PC which just has Mach3 on it and then use a laptop (or similar) for your design work.

Tweakie.

4059

Newfangled Mill Wizard / Re: Suggestion for Mill Wizard

« on: May 11, 2014, 11:58:19 AM »

Hi graemecns,

If you change the X axis Scale DRO from +1.0000 to -1.0000 that will do it (if you have chosen bottom left for the origin X zero, Y zero that will change to bottom right but if you have chosen the centre of the work as the origin then there is no problem).

Hope this helps.

Tweakie.

4060

General Mach Discussion / Re: h-bot can mach3 run them?

« on: May 11, 2014, 11:51:21 AM »

Hi Nobby,

All the parts (V-Groove, V-Wheels, belts, pulleys etc.) can be obtained here http://openbuildspartstore.com/ - they also have many agents / distributors around the world.

It depends on the accuracy you require (belts will stretch) but the H-Bot idea is interesting.

Mach3 is not designed for the H-Bot type of drive configuration but I am sure some clever person could write a post processor for it 

Tweakie.