I sent an email the first of the week about getting on the list of those wanting a circuit board. I would like to be included on purchase. Please email me with...
... I also sent Aaron an email earlier in the week about being included on the pcb board purchase. My email is roberttgeorge@... I just ordered Ben's...
I am sorry I have not updated anyone on the status of the circuit boards. Currently I am in the process of selling a home and purchasing a new one (with enough...
Aaron: You are doing us a Favour so please take care of your personal situation. I will be glad to wait until you can fit the board into your schedule. Derek...
Hi Aaron, The simplest, and probably the prudent thing to do, would be to get the final head count by way of advanced payment. That way, you get a definite ...
andrey@...
Jun 2, 2007 6:28 am
1084
I have the varying DC on terminal strip #3 as I should, but do not get the proper nulling on the LED. This is with the quad chip in, but not the driver chip....
Mark, Without the driver chip IN the bi-color LED will do nothing. Yours must be IN, correct? When you vary the pot, there is NO middle ground. The LED will be...
Rich, I had the driver chip in but couldn't get a null. I had the motor hooked up and it ran either forward or backward with no off. The whole machine is not...
Mark, the Plunge EDM is a closed loop control. Without an electrode setup and touching the grounded work, you have an open loop. It will only strive to drive...
Hi Aaron, When you get around to it, I'd be interested in a Stepper driver board, and the pulsed power control board . Thanks for spending the time on these...
Mark THERE SHOULD there be a null. The machine will work with not null but it is working the motor and everything else harder then what it is designed to do. ...
Well guys I had decide to make available a PC Board for the EDM machine, though I don't have a price for them at this time. It will be basically the EDM...
I plan to build an EDM machine and for a time my intention was to build the Robert Langlois design as originally published. But now that other designs are...
Ben, Well hell, nothing like getting it "from the horses mouth". I've committed to the group deal already circulating but I'll gladly get yours as well. Count...
andrey@...
Jun 5, 2007 9:26 pm
1094
Harry I also am a live steam builder and home shopper. At one time I thought of the Langlois design, and even talked to him at a NAMES show back about 5 years...
Harry, "No contest, you can't beat Ben's design" See also: http://modelenginenews.org/meng/edm/index.html (which goes into great and boring detail on why it's...
... Ben, I see ZERO reason to use a stepper for a plunger EDM. Your servo design is so simple and effective in comparison. The only reason I can think of is...
Depends on 'HOW' you 'KNOW' the exact position. Your stepper is not going to drive to that known position when that position keeps moving (as metal is...
... I think you've nailed it Steve. The "uninitiated" think EDM requires precise positioning of the ram when what is required is maintaining the condition that...
<TOP POST - Bad Andrew> Maybe they are thinking of driving it from a micro and want to include some other terms than just open circuit voltage in the feedback...
Guys I don't want to start a war here, this has been a very civil group and I plan to keep this group that way. There is enough of that on other list I...
... My case, Stepper is trivial to add and uses very little board space (as long as you don't try to use discreet logic to drive it) Your (Bens) original board...
Lo' Harry, missed you at the Mid South meet (you too Richard C.). I built Ben's power supply/control unit into as compact a space as possible. A 350W ex PC...
Hello every body, I would like to start learning EDM, I have read about EDM but I would like to build a circuit. any help? thanks ... Finding fabulous fares is...
... Yep, get a copy of "The EDM How To Book" (I believe it is by Ben Fleming, but most people here can fix my spelling if it is wrong) and "The EDM Patent...
Ben, If the system used a PI/PID servo control then it would not be so reliant on getting exactly the right motor gearbox, leadscrew and supply voltage. As it...
... PI would be great, but -D would probably be a bit problematic with the sort of position error signals we have here - meaningful differentiation would be...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
