Messages

21

General Mach Discussion / Re: I have not been able to find information on this automatic zero/ height meth

« on: April 16, 2008, 05:15:13 PM »

Pins 10 thru 13, and 15 are inputs, take your pick. I wouldn't solder to the pin on your board, I'd get a stacon connector and crimp or solder to a wire, then push it onto the pin. Or solder a screw terminal on the board in the corresponding position.
RC
Do you have a breakout board ? Or does the ribbon go directly to your PP ?
If you do have one, pick any input available. Are there any limit/home switches on your rig ? If you do, they will be using one or more of the inputs.
The breakout would be between your Xylotex and the PC.
RC

I do not believe I have a "break out board".   I would be more than willing to install one if you think it would help.  What's a stacon connector.  Is that a device I can solder into across all the pins that are on the board, or just one?  I have a bag full of the attached picture if that is what you mean.

As I am understanding it, all I need is a wire soldered between pin 15 and then take that wire to a piece of metal, and then the bit will automatically sense when it touches metal?  Seems like PFM to me, but I will give it a shot.  (more pics)

22

General Mach Discussion / Re: I have not been able to find information on this automatic zero/ height method

« on: April 16, 2008, 10:30:15 AM »

Pardon me asking - but are you trying to build a retractable undercarriage for the jet - using stepper motors driven by the board you had photographed.

I only ask, because I cannot see how Mach3 can help??? I can understand the stepper driver board - it is simple to connect and reliable, but unless you have an on board PC how can you control them.

Without being too silly - and you say electronics is not you, a Programmable chip would be the ideal controller for driving the Stepper board. It could put out the corect number of pulses to the board (up or down) - and mean that your radio control only had two signals to send - undercarriage up and undercarriage down.

Or am I (yet again) way off the mark.

I made the retracts and struts shown in the photo.   For those that have helped me, thanks so much, I am an over 6000 poster at Rcuniverse.com where I specialize in jet talk.  An example of my work:
http://www.rcuniverse.com/forum/m_7358034/anchors_7360470/mpage_1/key_seanreit/anchor/tm.htm#7360470

I've been CNC'ing for over a year now, with a CNC router and a Taig mill.  Along with a 9x 20 lathe.  A friend and mentor has a 4 axis tormach maybe three miles from my house, and an 80K lathe.   So it's not like I am without resources, however, when it comes to the making or extending capabilities, we have only purchased equipment, never built CNC equipment.  Exception a small 4 axis hobby cnc foam cutter a year ago. 

As I understand this latest schematic, I would solder the wire to pin 15 which is 4th over from the left?

Thanks for the compliments on the jet, I have the molds here to that one, and another model.  It takes about 300 hours to lay fiberglass up, build intrastructure, and get it ready for flight.   Specs are 96" long 76" wingspan, The spar system is T6 CNC'd rated for over 40 g's.  It has wheels and brakes.  Pneumatic operated.  Has 36lbs of thrust and weighs 29 lbs without fuel, and almost 40 with fuel.  Flies for 10 minutes on just over a gallon of JetA or Kerosene.

Thanks again for the help.

23

General Mach Discussion / Re: I have not been able to find information on this automatic zero/ height method

« on: April 15, 2008, 09:26:26 PM »

I understand from that document about the pins that are "input" pins on page 11.  However, I don't see anything like his picture on my board.  Does that mean I can't do this?  Or that I need to cut the ribbon on the DB 25 chord and splice in this magical wire?

Sorry I don't understand this.  I can build jets that go 200 MPH from scratch, electronics though, not so much

24

General Mach Discussion / Re: I have not been able to find information on this automatic zero/ height meth

« on: April 15, 2008, 05:30:01 PM »

Picture of my jet.

25

General Mach Discussion / Re: I have not been able to find information on this automatic zero/ height meth

« on: April 15, 2008, 05:29:19 PM »

Thank you so much for the help.

Can anyone identify this board to tell me where I wire this setup to?

I'm trying to build retracts for my Turbine Powered Jet, and want to shorten the time it takes to reset.

Thanks again,

Sean

26

General Mach Discussion / I have not been able to find information on this automatic zero/ height method

« on: April 14, 2008, 04:16:55 PM »

http://youtube.com/watch?v=ENoIdEcxeFc&feature=related

Can someone show me the thread that describes how to do this, or please explain it to me in terms a 10 year old can understand?

I would greatly appreciate it.  I need to know what program to put into mach three to autoposition like it is doing and also need to understand the electrical circuit, along with where those wire's go on the parrallel chord to the computer for the power and feedback.