Control box rebuild

[Palletlad]

What I've found on the Web so far is for the spindle control it is as follows:
Com - GND
AN1 - 0-10v
X1 - pin 17
However looking at your diagram X1 (FW) is used for on off relay.
Here's what I have vfd end
I'll try out your diagram, will getting the wires wrong do any damage to the vfd?

[john swift]

looking at your photo of the terminals
this is how I would connect to the VFD
with the forward on/off control being BOB's the relay controlled by pin 17



yes
the relay switches the VFD on in the forward direction
and is the simplest control with one switch
depending on the parameters set for input X1


you could have 3 switches
one for on / off

a second for forward that works in conjunction with the on /off switch

the 3rd being reverse that works in conjunction with the on /off switch

John

[Palletlad]

Hmmm whilst attempting to set up the VFD I have hit another snag and I am guessing its noise interference or which ever its called with the data cables. I am getting intermittent stalling on the motors and in one case when moving one axis another was twitching (all when manually jogging)
#BIGsigh

[john swift]

from your photo



its not clear what is connected to earth
I suspect from the little I can see
its just the metal enclosure and the screen on the cable connecting the stepper drivers to the chassis connectors to the motors

does the motion controller have an ethernet connection to your PC ?


John

[Palletlad]

yeah as its all in a wooden box the wires from the drivers to the motors are the only things earthed for the shielding.
If I ground everything would that help with the interference?

[Palletlad]

ok had done some reading and going to ground my components tonight and replace some wires with shielded wiring and see if that works as I've just read a few threads in regards to this issue and it all boiled down to shielding and earthing component's.

[john swift]

that will explain the problems

I can not see an earth connection to the VFD

John

[Palletlad]

looking at your photo of the terminals
this is how I would connect to the VFD
with the forward on/off control being BOB's the relay controlled by pin 17



yes
the relay switches the VFD on in the forward direction
and is the simplest control with one switch
depending on the parameters set for input X1


you could have 3 switches
one for on / off

a second for forward that works in conjunction with the on /off switch

the 3rd being reverse that works in conjunction with the on /off switch

John

Ha Ha I didn't realise you drew on the photo that makes a lot of sense now, thanks for the info.

[Palletlad]

I'm on a buzz atm with lots of thoughts of this and that, think I found my second calling in building electronics (1st being woodwork) though I have a long way to go in learning.
My thought was in regards to the main cables from the drivers to the motors, although it was fun cutting and soldering the 4 pin plugs I was contemplating to have a single cable (per motor) running from the stepper to the motor with no 4 pin plug then if needed to separate I simply unplug the green connecter block on the driver.
Is this a done "practical" option or do people just stick with the plugs.

[john swift]

if I remember correctly a post on cnczone showed a control box with the cable going through a strain relief instead of the more usual plug & socket

this has the advantage of reducing the number of joints

but the possible down side is damage to the driver if you to unplug the connector from the driver very often

while some of the problems are due to cheap copies of the green connectors being used (I can not remember the original manufacturer)

you will find examples burnt connectors in both cheep chinese machines and on the Leadshine 3nd883 drivers used by Tormach



http://www.model-engineer.co.uk/foru....asp?th=127744

John