Topics

1

Building or Buying a Wood routing table.. Beginnners guide.. / Chinese air cooled spindle opinions - Changsheng vipwindows_168 on EBAY

« on: February 13, 2016, 11:25:36 AM »

Hey everyone.

I am looking at getting this Chinese air cooled spindle and VFD from vipwindows_168 on eBay.
http://www.ebay.ca/itm/191590377107?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT&afsrc=1&rmvSB=true

Does anyone have any experience with a Changsheng spindle like this? Has anyone dealt with vipwindows_168?
Any and all information would be greatly appreciated.
Thanks!

2

General Mach Discussion / STEPS PER help - losing my mind

« on: February 11, 2016, 01:31:02 PM »

Hey everyone.

I need some help with the STEPS PER part of Mach 3. Putting a dial indicator on my CNC movement doesn't really equate to my STEPS PER calculations.
Also, upon cutting 1" squares. My squares seem to turn out 1.0000" Y, and 1.0040" X
Are STEPS PER subject to fine tuning or is the calculations you do, depict exactly what the STEPS PER should be?

Here is the info on my machine:

Techno Isel Model 040 http://www.techno-isel.com/Tic/H830/HTML/H830P046.htm

Leadshine Closed Loop stepper motors and drives http://www.ebay.ca/itm/Leadshine-Closed-Loop-stepper-Drive-motor-HBS507-573HBM20-1000-3PH-2NM-57mm-NEW-/121559936057?hash=item1c4d896c39:g:dxoAAOSwVL1V-OrR

Here is the info I am putting into a Stepper calculator revision 1:

Degree/step - 1.2

Pulse/rev (micro stepping) - 4000

Leadscrew threads/in - 5.08
Thread starts - 1

Steps Per Inch - 20,320



When setting up a dial indicator to the CNC movement of X and Y, 20320 step per doesn't get me to 1". 20335 gets me to 1" right on the money.
Does anyone have any ideas or can point out what I am doing wrong?

3

General Mach Discussion / CNC router shudder and jerky / jitter doing 3D toolpaths

« on: February 04, 2016, 05:35:46 PM »

Hey everyone.

I have some toolpaths where I cut out a guitar neck. While doing any straight cuts, my CNC router runs great. When I get into doing the heel or volute carve on the guitar neck, the CNC is going through A LOT of little code to make the moves and it can start to shudder / jitter pretty bad. It shakes the whole CNC.

I am running those paths at 50 IPM but Mach 3 only says it makes it to 10-15 IPM for all those lines.

I don't know anything about CV mode but could it be that? Or would it be my post processor for Mastercam X4?


Any help would be greatly appreciated.
Thanks.

4

General Mach Discussion / Nema 23 Z AXIS brake questions - closed loop stepper

« on: December 23, 2015, 07:30:05 PM »

Hey everyone.

I just bought a set of Leadshine closed loop stepper motors and drives. I am going to install them on my old Techno Isel 027 CNC.
http://www.ebay.ca/itm/2NM-Nema23-Leadshine-Closed-loop-stepping-motor-drive-kit-HBS507-573HBM20-1000-/191574934333?hash=item2c9ac1833d:g:DZYAAOSw9N1VuGzl

The original Techno Z axis stepper motor had a Lenze brake on it. I figure I am going to need a brake for my new Z axis closed loop stepper motor.
I am very new to brakes and know little about them. I take it I will need a NEMA 23 mounted brake to go with my closed loop stepper motor.

Can anyone direct me to a manufacturer that would fit my needs? I expect to pay around $200. Is there anything available in Canada? What holding torque would I need?
I can't find any of them on eBay.

I really appreciate any help the community can give.
Thank you.

5

General Mach Discussion / X axis consistently off on one toolpath

« on: November 24, 2015, 04:23:25 PM »

Hi all.

I have a quick question.

I have a particular guitar fretboard toolpath I have been working on and whenever the CNC cuts it out, I have one axis consistently off by about 1/32"
Now here is the part that I don't understand: On one side of the fretboard, it is 1/32" too small. On the other side, it is fine.

What would this mean? I don't think that would be lost steps because it always shows up on the one side of the guitar fretboard.
I have checked and rechecked my toolpath and it SHOULD cut the fretboard perfectly equal on both sides.


Any ideas what is going on?

6

General Mach Discussion / Mach 3 CNC cutting 1/32" too far in both X and Y axis

« on: November 10, 2014, 03:16:02 PM »

Hey everyone.

My old XP computer died out on me the other day and I had to upgrade to a new one running Windows 7, 32 bit.

Back story:
I run a lot of the same parts on my spoil board. It is filled with indexing pins and bolts to attach guitar blanks. I am using my CNCs home position as my work zero. I just bring the Z axis down to locate where the top of the wood is and set it. All my programs are made with the home zero of the machine being the location point. It has worked many times before switching to this new computer.  My machine calibrates by moving to it's home position (X0, Y0, Z0) and hitting a couple of limit switches. This is what tells it where it is.


The problem:
Today I noticed the Y axis and X axis cut almost 1/32" too far (equally). I could tell this because I could see new cut marks in my spoil board. This spoil board has many old cuts in it from running the same guitar neck from the old computer. Taking measurements from an old guitar neck and comparing it to the newly cut one shows everything off 1/32" on one side of the new guitar neck.


I have no clue why this is happening.

Any suggestions?

7

General Mach Discussion / Losing Y position erratically

« on: August 14, 2014, 08:25:02 PM »

Hello everyone.

I am new here. I have read through these forums MANY times but today I ran into an issue that I could no longer deal with.
I will try and keep this short and to the point.

My CNC is a Techno Isel 040 H830 with stepper motors. I am using the latest version of Mach 3.
I was running a guitar body today and after completing one toolpath, the CNC started the next toolpath 1" too far to the right. I have only had this problem once before. I was cutting out a guitar headstock shape and the CNC was too far in the Y+ axis by roughly 1". This has never happened to any other AXIS.


Upon reading through some forum posts, my issues are very similar to this post (I am pretty sure my Mach 3 is legit though):
http://www.machsupport.com/forum/index.php/topic,23270.0.html

If memory serves me, the DRO and Toolpath showed the travel was in position. When is reality (looking at the guitar body on the table), it was not.
If I remember correctly as well, the first time I had this issue the CNC had been running all day. This was the case this time as well. I felt the stepper motors today and they were quite warm to the touch. The controller felt warm as well (not as hot as the steppers).

I posted an image of the damaged area. The start of the neck pocket was supposed to be left by about 1"!


This problem has only happened twice but I would like to rectify the issue before destroying any more material.
I hope you all can help!

Thanks.