Need helpwiring up from scratch

[GeorgeD]

No output to the A axis either put it in slave mode over Xaxis and still no running f both axis.

Checked for continuity on tracks to IC U4 74HC541 line driver chip might be faulty?

[irving2008]

hmmm... does Z work?

It would be very unusual for a chip to fail, these line drivers can take a lot of abuse. You could unplug the BoB from the PC and exercise each pin 2 - 9 to ground and to +5v with a bit of wire and check the voltage at pins 2 - 9 of the HC541 and the matching outputs 18 - 11 and see that they are as expected.

Its def an HC541?... you've not got the 541 and 244 swapped over (which would give exactly those symptoms i.e. 2 work, 2 dont)

Irving...

[GeorgeD]

Yep Z and Y axis ae fine.

Quickets way to find out is replacing the chip,Irving as they'e only pennys to buy.

Will let you know in a dy or two how I get on with it and inform you as to whether it was the chip.

For now I've neglected other work messing around with this and I'll tackle that work till I nip down the towny for a replacement chip.

Many thanks for your help and those who chipped in,appreciated

[GeorgeD]

Got another problem,since I know the Z and Y axis work I've been having a dabble to try and get to know MAch3 functions and how it works.

However in the Motor tuning setup I cannot get anything out of the motors,they jut won't turn....they work fine if I load a G-code.
Going through the PDF of how to set up Mach3 and this is the first thing it explains to do but it ain't happening for me :cry:any ideas?

Thank yer vey kindly

[GeorgeD]

Dang! hold the front page chaps...I reread the PDF and must have overlooked the part where it says "Now press the up&down key on the keyboard"

[irving2008]

Dang! hold the front page chaps...I reread the PDF and must have overlooked the part where it says "Now press the up&down key on the keyboard"

Ummm, think i said that in post #30...

[GeorgeD]

Ummm, think i said that in post #30...

So you did Iving,:heehee: I gotta blame it on her indoors,she keeps me awake half the night :naughty:

[GeorgeD]

Success,seems it wa the chip after all.

I got a couple at 30p each and also the other type as well.
Good job I put them in DIL sockets rather than directly slodered. :-)

[irving2008]

good to know you're "on the move"... glad to help

[GeorgeD]

Magic,Iving.

Is it normal for the motors to make a noise(not operating)when not in use ie no pogram running for their use?

Thanks.