Messages

5891

Tangent Corner / Re: A Winter Project.

« on: November 01, 2011, 03:59:34 AM »

Everything has to have an identification label (cleaned for the photo). Sadly the Morris marque now belongs to the Nanjing Automobile Corp. and the Morris oxford site is now a business park but for this little oil cooler the memory lives on.

Unfortunately the original oil pressure sender has expired so, for the time being, a more recent model is going to be used.

Tweakie.

5892

*****VIDEOS***** / Re: Studs welding

« on: October 31, 2011, 12:08:41 PM »

Excellent Andrea.
Did you design the head/nose that actually holds the studs or is this a proprietary device ??

Tweakie.

5893

General Mach Discussion / Re: first run with mach3

« on: October 31, 2011, 07:04:08 AM »

Hi Asen,

You should be able to calculate your steps per unit of movement exactly for each axis that uses different pitch screws etc. This calculator may be of assistance to you http://www.machsupport.com/forum/index.php/topic,16315.0.html

Tweakie.

5894

Tangent Corner / Re: Now this is Fall weather!!!

« on: October 30, 2011, 08:47:58 AM »

That looks pretty Dave.

(It always looks pretty when it's in someone else's back yard   )

Tweakie.

5895

Show"N"Tell ( What you have made with your CNC machine.) / Re: Very small parts, smallest possible engravings.

« on: October 30, 2011, 02:37:43 AM »

Hi kregan

Looking good. 

You seem to be getting a turn-on (or turn-off) delay looking at the dots on those short lines ??

Tweakie.

5896

General Mach Discussion / Re: first run with mach3

« on: October 28, 2011, 07:04:37 AM »

dear Tweakie

I just try another smaller nema 11 ,yesterday the motor can run by jog with keyboard or DMG on srenn , but when I run use G0 command ,the motor run about 3/4 turn ,stop for a while ,then run again 3/4 turn ,stop ,then run again .

what is this cause from ?.

pls advise.

thank you

Hi Asen,

My guess is that it is your PC.
If it is running background tasks or sharing application time like multi-tasking then this may cause the issue you are having.

Tweakie.

5897

General Mach Discussion / Re: TB6560 - Mach3 and laser firing

« on: October 28, 2011, 01:53:43 AM »

Hi Richard,

If you haven't read it already you may find this thread of interest http://www.machsupport.com/forum/index.php/topic,12444.0.html

Tweakie.

5898

General Mach Discussion / Re: newbie problem cutting circle

« on: October 27, 2011, 11:16:58 AM »

OK, I think I understand now. 

Go into config / general config page and change IJ Mode to Inc

That should do it.

Tweakie.

5899

General Mach Discussion / Re: TB6560 - Mach3 and laser firing

« on: October 27, 2011, 06:08:27 AM »

Hi Richard,

It is perhaps easiest to choose an output pin# which is available at a connector on your controller board for the Z Axis direction pin (then set this within Mach as the Z axis dir pin#).
I have pin#16 set as the direction pin and this is then connected to the laser trigger. The pin can be toggled, within Mach, active high / active low to suit you laser TTL logic input.

Hope this helps,

Tweakie.

5900

Tangent Corner / Re: A Winter Project.

« on: October 27, 2011, 05:35:41 AM »

I understand what you say Terry and you are, of course, quite right but there are probably a lot more of these APU’s than there are Vulcan bombers right now.
There are two Vulcan’s near to me and neither have their APU’s in working order but according to the manual these units have to be run-up and tested every 7 days to stay within service. To keep everything in the aircraft working would need a full time, trained, ground crew of 18 and goodness knows what quantity of spares – an almost impossible task for the historical aircraft preservation groups.

Almost everything about this APU is over engineered and it seems that little consideration for weight has been given in many areas. This Rotax Actuator is one of two (one for the oil cooler radiator blind and one for the ‘run / stop’ fuel valve) and is a typical example where, for instance, the ‘mod record label’, which is just one small (non-critical) part, is fixed with 4 stainless screws which are then locked with seizing wire when a label could have been fixed with small rivets (like the identity label) or even had the legend engraved into the surface.
Both these actuators had age related faults, one with a jammed limit switch and the other with a seized motor shaft brake, but both units working again now.

Overall I do understand that this equipment is historically important and will outlive me so I am really just looking after it and keeping it in working condition for someone else who will perhaps carry out a full restoration job at some future date.

Tweakie.