Messages

31

Works in progress / Re: Belt and Pulley calculator screenset

« on: June 30, 2008, 08:31:07 AM »

great work Darc ,


Dave

32

General Mach Discussion / Re: Motor Tuning - Mach3

« on: June 30, 2008, 03:46:25 AM »

also sounds as if you have some binding in the ballscrews or slides , refering to your point of bump bump every 2 revs , try removing the steppers and turning them by hand
to feel for any roughness  binding or stiffness first, both on your slides and screws , make sure your sliding surfaces are clean and greased too .

if all the motors are the same type , then the same settings should get you near or at least into the ballpark and then fine tune from there

33

General Mach Discussion / Re: Zero plate problem

« on: June 30, 2008, 03:29:19 AM »

are you using an opto isolated breakout board , this usualy inverts the signal , or could be that the pin is pulled high by a resistor to your 5v , modifying the board by removing the resistor or swapping it to 0v instead of 5v may help , let us have more information on your breakout board etc

Dave

34

General Mach Discussion / Re: Z stepper jerky

« on: June 26, 2008, 11:32:25 AM »

I'd check the power supply out too , both volts and current wise when all axis are moving together.
no voltage drops on the cables etc .

Dave

35

General Mach Discussion / Re: I beleive this is a PC Hardware Conflict

« on: June 24, 2008, 05:10:39 PM »

I doubt if a video card etc would solve the problem you are experencing , it's a bit more deep routed as a motherboard design issue
and then matching the p port to the breakout board  , i'd wait for your ss , a much more approprate solution all round in my opinion
 
Dave   

36

General Mach Discussion / Re: I beleive this is a PC Hardware Conflict

« on: June 23, 2008, 11:40:11 AM »

ok , i'd agree  by the tests you have done  it looks very much as it's the parrell port. it's becoming a common problem

Dave   

37

General Mach Discussion / Re: mill retro HELP

« on: June 23, 2008, 11:37:58 AM »

Hood ,

we are using Both with the mach3 plug in and their own software ,
we are  working with them as their Uk /European Distributor

Dave

38

General Mach Discussion / Re: mill retro HELP

« on: June 23, 2008, 04:27:11 AM »

ha ha ha , yep my fault , my human interface devices are faulty somewhere
here's the correct link for anyone interested

http://www.dynomotion.com

Dave

39

General Mach Discussion / Re: mill retro HELP

« on: June 23, 2008, 04:13:10 AM »

i am using the same Baldor drives ( Tsnm) types i presume ,
using a Kmotion Controller from  http://www.dynamotion.com


Dave
 

40

General Mach Discussion / Re: I beleive this is a PC Hardware Conflict

« on: June 23, 2008, 03:06:29 AM »

Some opto isolators do not like 3.3v parrell ports ,( as 3v is at the midway point of the voltage swing of 5v , the opto sometimes has difficulty deciding which logic level is correct and so gives an incorrect pulse , the higher the port speed the more this can happen )  and are a better match to 5v  , so your problem could be the parrallel port and or including  the opto isolation switching being poor at the frequencys being used  , try bypassing the opto isolators for the axis step as a test , as inputs or relays etc  are at either logic high or low ( 0v or 3.3v )then this problem will not show on switched limits etc .

their are convertor chips available that can handle the 3.3v to 5v logic levels , if this is found to be the problem , or even replacing the opto's for a different type more suited to 3.3v may help .

also check your dc supply to the bob , make sure you have enough current 

Dave