Messages

7641

Show"N"Tell ( What you have made with your CNC machine.) / Re: Miser engine

« on: March 21, 2009, 03:00:36 PM »

Brilliant Vince. 
I think that letting it run a while will free everything up OK.

Tweakie.

7642

Tangent Corner / 'BIG' CNC

« on: March 20, 2009, 06:54:15 AM »

I spotted this on Flickr - it is just about the biggest CNC I have seen - how about you ?.

Tweakie.

7643

General Mach Discussion / Re: Motor "Sometimes" goes in Wrong Direction while Tuning

« on: March 18, 2009, 01:30:20 PM »

Hi Jamie,

No other suggestions, sorry.

Incidentally do the motors have sufficient torque ?. (can you stop them with little force when they are rotating).

Tweakie.

7644

Show"N"Tell ( Your Machines) / Re: Laser cross hair tool position.

« on: March 18, 2009, 11:39:29 AM »

Thanks Dave.

This is the big advantage of making things for yourself - the boss doesn't moan at you when you don't get it right first time.

Tweakie.

7645

General Mach Discussion / Re: Motor "Sometimes" goes in Wrong Direction while Tuning

« on: March 18, 2009, 07:34:54 AM »

Hi Jamie,

As Hood said earlier have you tried changing the direction signals from active high to active low (or visa versa) ?. This is under Configuration, Ports & Pins, Motor Outputs.

Tweakie.

7646

Show"N"Tell ( Your Machines) / Re: Laser cross hair tool position.

« on: March 18, 2009, 04:39:13 AM »

An update.

The initial mounting method for the polarising filter suffered with a major drawback in so far as it allowed machining dust to enter and settle on top of the filter disc. I have replaced the two alloy spacers with a turned part that should resolve this problem.

Tweakie.

7647

General Mach Discussion / Re: Motor "Sometimes" goes in Wrong Direction while Tuning

« on: March 18, 2009, 03:33:08 AM »

Hi Jamie,

Sorry I just assumed you would know.
A breakout board (BOB) is where the LPT connection from the computer joins with the machine. Some BOB's are 'active' in so far as they incorporate opto isolators and are powered 5 Volts. The Gecko controller already incorporates opto isolators on its inputs and sometimes behaves oddly if active BOB's are used. For Gecko operation a passive BOB is usually used.
Hope this explains what I was getting at and once again sorry for posting a reply that was not fully explained.

Tweakie.

7648

Show"N"Tell ( Your Machines) / Re: novakon milling

« on: March 17, 2009, 12:48:19 PM »

Very very nice machine Marcel.

Tweakie.

7649

General Mach Discussion / Re: Motor Tuning Issue

« on: March 17, 2009, 12:46:03 PM »

Hi,
Two things to check:-
1) Are you saving the changes you make under the motor tuning menu ?.
2) Do you have 'constant velocity' checked in the general logic config page ?.
Answers to both the above should be yes.

Tweakie.

7650

General Mach Discussion / Re: Motor "Sometimes" goes in Wrong Direction while Tuning

« on: March 17, 2009, 12:36:15 PM »

It could be that the direction signals are somehow getting corrupted. You are not using and active BOB (with opto isolators) prior to your Gecko connection are you ?.

Tweakie.