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Also Pminmo's a3977SED board on the open source forum. I believe this is the same driver as the zylotex. He also has a lot of other driver circuits.

Good luck.
Paul

Our machine at work uses sheets of some porus fibreboard about 2 mm thick. it is almost like stiff felt, the vacuum works through this.
Paul

All this week I got to work (play) on our large Pacer CNC at work, and I managed to fit in a fiddle, here are my X-axis strengtheners that I made from an offcut I havent tried them in anger but the...

I dont know if you were specifically replying to me, but I am only one of the great unwashed on this forum not a moderator. :)

Paul Cardiff/Wales/UK

its not looking for a wireless network that it cant access in the garage is it?
Paul

in the 'CNCZone Clubhouse' section there is another (underused) subsection 'Europe Club Hous'e where some people have stated where they live.

Paul

a 3" x 5" router could probably be run with 3.5" floppy steppers ;).
Im sorry I couldn't say about a 3' by 5' but my jgro ( about 2' x 3') is running ok with 180oz steppers and M12 studding so it...

I was just about to go to bed but here it is!
Please understand that i am just getting this running and it wont be this untidy in the end, and I have just removed the previous circuits from my box,...

Pminmo.
I found the problem after I got the scope. Running Mach2 the minimum step pulse width was too small, looking at pin 5 of ic1 the filter of R17 and C14 was causing a very small triangular...

Well ive built the 4 axis breakoutboard and one drive, and now have it almost working, when I enable the drive the motor locks as expected, but it just very quietly whispers and wont move, it is...

Well I have managed to get my 3977, almost double the cost due to the postage from the states, but delivered in less than 48 hrs.
I have milled one board to try, a slightly modified version of...

What is high density compressed timber compound material, would it be HDF?

Like this, my first cut on my Jgro machine. This was from a DXF from Garys wooden clocks site Garys 2003 clock took about 10 minutes to cut in 1/4 ply, unfortunately a 3mm cutter is too big and the...

I think then I will try and sneak a few 3977 on my next order and try and hide the postage cost :devious:

Yes Farnell has the 3977 in stock, but since they are from Newark the postage is another £13, not too bad i suppose if they are what I want. My power is a rectified smoothed 25v toroid so about 35v,...

My Hans Wedemeyer L297/8 board just blew up. :( The magic electronic smoke escaped from the 298 when I turned on the power. So it is maybe time for a change. I have had no problems with this chipset...

Mach 2 is $149 only about £78 and is the best program ive found. One of the features ive just been playing with is the wizards, you can cut circular or rectangular pockets, linear, rectangular or...

Quoting from 'Red herring and white elephants - the origins of the phrases we use every day' by Albert Jack
' The guns on 18th-century men-of-war ships needed gun powder to fire them, and this...

Hi I am from Cardiff Wales. Just finishing No2.

Paul

Darren or anyone, do you have any helpful hints about methods of adjusting the rails on the machine, or is it just trial and error. Whatever I do it seems like the rails are bent (there not, i've...

Ive been following this thread and decided to make my second machine following the plans, only as I live in the UK my material is 18mm not 3/4 so some of the dimensions are different. Therefore I...

I left the common centertaps unconnected
Paul

all my motors are unipolar
Paul

sorry, just checked my original 3 are unipolar my spare 3 are bipolar but I can swap and change
Paul (chair)

I am in the process of building my second machine, Jgro's plans only a little smaller. I was looking at the circuits and wondered which set up would be the best to use. I will be using 2A steppers....

is it a special tool for removing left handed thrippets?;)

Im no expert, but on my machine I just used a hand drill, it cuts very easily but produces a fine dust which gets everywhere, it taps easily as well.
Paul

Out of interest how does it work?

there are some pictures of my machine at home here http://www.cnczone.com/forums/showthread.php?s=&threadid=2926 It is nothing like the bungard machine but more of a general machine. Made from an old...

I will try tomorrow to ground and shield everything, unfortunately the router is double insulated and therefore cannot be grounded.
Paul

I think I have narrowed the problem down. I changed the parallel cable, that didnt make a difference. Then I started changing the speed of the router, this changed the speed of the spurious movements...