As I thought, you *are* a nice guy, even you try to look grumpy... :) Thank you for your kindly offer, but sending packs over the ocean will cost you the same as the contents. I know because I've played ping-pong with a documentation (a quite heavy book) over the ocean. And you don't really want some jal code, isn't it ? best regards, Vasile On Mon, 8 Mar 2004, James Newton, Host wrote: > Only if you catch me on the fifth Tuesday of the month during a full moon. > > Actually if you modify the code to support RS232 commands I'll give you a > free set. > > Or if you modify it to support a keypad for entry of a constant rotational > speed. > > --- > James. > > > -----Original Message----- > From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU] On > Behalf Of Vasile Surducan > Sent: 2004 Mar 07, Sun 11:59 > To: PICLIST@MITVMA.MIT.EDU > Subject: Re: [PIC]: Help with stepper motor design > Importance: Low > > On Fri, 5 Mar 2004, James Newton, Host wrote: > > > First, my apologies for not responding sooner. I've been trying to > > figure out how I can help on this one. > > > > I've decided that the best I can do is just send out a stepper > > controller kit to you (no charge, but I do need your address) > > > Hmm, James, are you sending free steppers kits, to all who asking for ? > > :) > > > best regards, > Vasile > > and then hope for the > > best and try to talk you through building it and then try to find > > someone who can modify the source code to make it go to a position > > entered on a keypad. As it comes, the Linistepper needs step and > > direction signals and doesn't have a keypad option, BUT it does have > > enough spare IO pins to support a small keypad and the PIC > > Microcontroller has the smarts to manage that given a modified > > program. The trick is that I simply don't have the time to do the > > modified program. I can point you to resources for hooking up a keypad > > to a PIC and code for reading it, but you will probably have to hire > > or find someone willing to re-program it with those modifications. And you > will need to find a source for a keypad. > > > > As for the turntable, the only thing that comes to mind is an old > > record player, or a stepper motor from a printer or fax with a > > platform bolted to the shaft. > > > > I'm sending this reply to a large eMail list that specializes in PIC > > related projects. See: > > http://www.piclist.com for more information on that. Hopefully someone > > on that list will be willing to take a look at the Linistepper code: > > http://www.piclist.com/techref/io/stepper/linistep/lini_asm.txt > > and re-use the 5 available IO pins for your keypad support: > > http://www.piclist.com/techref/microchip/keymatrix.htm > > http://www.piclist.com/techref/microchip/4x4key4io8diode.htm > > http://www.piclist.com/techref/microchip/keyless6.htm > > > > And why didn't they have robotics classes when I was in 6th grade? > > > > --- > > James Newton: PICList webmaster/Admin > > mailto:jamesnewton@piclist.com 1-619-652-0593 phone > > http://www.piclist.com/member/JMN-EFP-786 > > PIC/PICList FAQ: http://www.piclist.com > > > > > > > > > > > > ________________________________ > > > > From: Wesley [mailto:wesleyfitzgerald1@nc.rr.com] > > Sent: 2004 Feb 29, Sun 06:26 > > To: jamesnewton@piclist.com > > Subject: Help with stepper motor design > > > > > > John, > > I need to make a demo unit for my son's sixth grade robotics class > > here near Raleigh, NC. In April they are building a demonstration > > device that allows ball bearings to roll onto different "tracks". My > > kid's team wants to make something they can control with parts from > > Radio Shack. Big challenge for kids - much less adults!! I know > > NOTHING about stepper motor other than reading hundreds of pages on > > the internet. I was impressed with your personal nature when you > > explained things to folk's questions. Thought you might help. > > > > Here is their plan. The want to make a round disk of wood (12" in > > diameter) with small dimples near the perimeter. Marbles will sit in > > each dimple. As the disk rotates they want to be able to eject the > > marbles - at specific locations on the disk. Now we are talking about > > indexing. They want a device that they can use simple switches to > > reverse direction, move to a predefined location, then move to another > > location, etc. They do need precision. The marbles will roll down a > > model RR track rails to a robotic arm where it will place certain > > color marbles into certain lifts. It gets a little more complicated > > but the biggest challenge is making an indexable turntable. My son is > > uing the DACAL 151 CD/DVD storage media device as his idea. Smart kid. > Unfortunately, the kids will not get their project back. > > If successful the project will end up in the NC Kids Museum > > representing their school. > > Can you provide me with a pre-programed kit that steps smoothly? It > > would be nice if the kids had a keypad to punch in the location number > > on the turntable and hit enter and the table rotates smoothly at about 1 > to 2 rpm. > > Can you help me or do I need to seek help somewhere else? Call me if > > you wish as (919) 434-3493 or e-mail me at: > > rfitzgerald1@nc.rr.com > > > > Thanks in advance for taking time to read and respond to my request! > > > > -- > > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > > > -- > http://www.piclist.com hint: The list server can filter out subtopics (like > ads or off topics) for you. See http://www.piclist.com/#topics > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics