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Messages - Daznc

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General Mach Discussion / Re: X axis seems to be mirrored..??
« on: August 02, 2010, 12:52:07 PM »
Thanks very much!

Sound advice and all sorted!! ;D

General Mach Discussion / X axis seems to be mirrored..??
« on: August 02, 2010, 11:10:03 AM »
Hi all,

First off like to say what a top and very helpful forum, I have spent many hours scrolling through and finding what I need but this issue I have now has stumped me!

I have a Sieg X2 mini mill using a new type of cnc screw kit (please see below) and I'm using a motion control kit for the electronics and Mach 3 for control.

I have spent the last 2 years on and off putting all this together and have now finally finished the build. I have a home switch on each axis as well as a overtravel one on the x & y. All seems to run fine, the machine moves all In the negative direction and homes up to home switches perfectly with no problem.

My question to whoever is nice enough to try and help is the only problem now is the X axis seems to be mirrored, i.e. I have done a short program that would engrave "SIEG X2" for a test but the machine should start from the left hand side on the "S" but it seems to start from the right hand side and engraves backwards? The only thing I can think of is I have set the home position in the wrong place (would this matter) with the table all the way to the front and all the way over to the right. I have tried to reverse the "X" in the inputs/outputs page but when I do the machine overtravels and when I home it it will go the opposite way to where my home switch is. I want my bed to home at the front for ease of loading, is this my problem??

I'm more than likely being a total wally but thought I would see what others thought and if it does matter where I have my home position/switches set to.

http://www.computool.co.uk/SiegX2.html#Basic Mini Mill Checking dimensions

CNC Driver Kit 1 Nema23 425 motors with 3 off 4.2A micro stepping drivers, 1 off breakout board and 2 off 40V 7A power supplies.

Thanks in advance for any advice.


Thanks for all the replys,

I know it is a hard guess to know what settings i will need as i do only have the motors bolted to the bench but like i siad i just would like to know im heading in the right direction with the settings i already have.
Think it might be a bit easyer to know what i need and how hard i can push things once everything is bolted together as right now im unsure of the pitch of the ballscrews aswell.

The first thing i am going to check is the current the drivers are putting out as i know they are left at default for this kit which i think is 4.2A so might be a little to much. I will knock them down a notch and see if this make the motors make a little less noise, i know they do make noise but surly not as much as they are at present! Plus they do get rather hot with very little work, i can hold my hand on ther for about 10 seconds before its to much so they are running warm.

Jimpinder- The test G code that i put together makes each axis move one at a time in + & - direction then does a diagnal move of all axis followed by simulating drilling topped off with a 20mm rad going cw then ccw, the machining of the rad does sound crazy!! :) It just makes me want to get the thing all together and cutting some metal! Have to wait until next pay ceck before getting the mechanical side of things sorted though!

Thanks again for all the help


Hello all,

I have just finished all the wiring of the electronics for converting my Sieg X2 to cnc, still waiting to order cnc fusion kit so just mounted my motors to the bench for a test run with a slapped together bit of G code.
First thing that got me was the noise from the motors when idle, a hissing sort of loud air leak noise? Is this normal? Also they do get quite warm, how warm is safe? ???

Im just looking for someone to help me out or give any advice on what sort of settings i should have in the Mach 3 motor tuning page as in Steps/rev, Velocity, Acceleration and Step puls as i have read so many things telling me completly different settings!

I am using Motion Controls cnc kit #1 Which consists of:

1 x breakout board (very simple with port connection for pc and terminals for drivers/home switchs)

3 x 4.2A MSD542 microstepping drivers (default settings reccomended by MC- 8 microstep, 1600 steps per rev, full pulse, set by dip switchs)

3 x 3nm steppermotors FL60STH86-3008BF (1.8 Deg) 425 oz-in all wired bipolar parallel

2 x 40V, 7A non regulated power supply


I have played with various settings from default to many reccomendations from people on cnczone forum but still not happy that i have the correct settings that i need so thought i would see if anyone on here has any new ideas for a good starting point.

I do appreciate that i will not know the exact settings until i have the mill built and all bolted together but i would be alot more confident if i knew that Mach 3 was set halfway handy before i start wizzing beds around!

Any advice would or pointers would be greatly appreciated

P.s. A short Youtube vid of test run with all default settings on drivers and in Mach 3, Note you dont get to hear the high pichted hiss of motors that i did!




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