CAMheads CNC Router Forum By: CAMaster CNC

Go Back   CAMheads CNC Router Forum By: CAMaster CNC > CAMaster Machines > Cobra CNC Routers

Reply
 
Thread Tools Display Modes
  #11  
Old 10-29-2018, 08:12 PM
The real JP The real JP is offline
CAMaster Owner
 
Join Date: Mar 2017
Location: Oklahoma
Posts: 325
Default

What are they calling a transmission? That shaft with the pulley and gear?
__________________
Jpscustomshop@gmail.com

Industrial electrician by day, Cabinet and furniture maker by evening and weekend. Cnc newb.

June 2017 Stinger 3 SR48
3kw spindle, FTC, Laser, Recoil, Hurricane
V Carve, Mozaik
Reply With Quote
  #12  
Old 10-30-2018, 07:54 AM
Doug S Doug S is offline
CAMaster Owner
 
Join Date: Jan 2018
Posts: 95
Default

I sent in the entire motor, belt and pulley assembly and slide plate. The 10:1 reduction has bearings which wear out and the slide plate needs to be maintained also to keep it moving freely.
__________________
2014 Cobra 5x10 ATC w/ 10 hp spindle, Mozaik, 25 hp Becker High Vacuum Pump, 5 HP Oneida DC-Central Texas
Reply With Quote
  #13  
Old 10-30-2018, 08:28 AM
John B John B is offline
CAMhead Friend
 
Join Date: Nov 2017
Location: Comfort, TX
Posts: 29
Default

Not a long term fix, but more of a diagnostic effort here...

Remove the suspect set screw. Pack hole partially with a piece of "pulled off" bronze wool. Replace screw and tighten hard.

Any improvement will likely be "short lasting", but shouldn't harm anything and will at least confirm that this is where the problem lies.

If tech support gave you the torque specs on that screw, use them.

Also...you can sometimes tell what the "exploded" view of the assembly would tell you by examining the set screw. If it is a set screw that's in...say...an aluminum pulley that's riding on a steel shaft, then a flat bottom screw would likely indicate that it bears against a flat spot on the shaft. If it's "pointy" or dimpled, then it could be either a "flatted" or round shaft. You might also try replacing just the set screw(s). These are "somewhat" sacrificial. If it's been tightened too hard and the tip has been crushed against the shaft, then replacement will give you a new surface to bear against the shaft.

Last edited by John B; 10-30-2018 at 08:39 AM.
Reply With Quote
  #14  
Old 11-01-2018, 05:33 AM
Tristan Tristan is offline
CAMaster Owner
 
Join Date: Jul 2013
Location: KZN, South Africa
Posts: 141
Send a message via Skype™ to Tristan
Default

I have had the same issue, basically the shaft on the pulley/pinion was worn out, and the bearings that the shaft runs on was not too happy. Unfortunately, the shaft does not have a keyway (mine at least does not), so I machined a new shaft with a keyway, replaced replaced the bearings and "Bob's your Uncle"... The Pinions, I do need to replace every now and then. The smallest play in that shaft, makes a BIG difference in the accuracy of your machine.
__________________
Tristan Brammer

CAMaster Cobra CR-609 ATC
2018 CAMaster Elite CR-609 ATC

WINCNC
Enroute 4 and Aspire v8 Design Software
AutoCAD, Autosketch, Sketchup

Razor CNC
Mach3
Aspire v8

"Sawdust means Work in Progress"
Reply With Quote
  #15  
Old 11-01-2018, 08:21 AM
james mcgrew's Avatar
james mcgrew james mcgrew is offline
Administrator, (MOD, KOTR)
 
Join Date: Sep 2008
Location: ridgeway sc
Posts: 6,766
Default

Quote:
Originally Posted by Bert Wilson View Post
Posted this problem last Friday and sent link to Camaster. Post was removed, and historical link was password protected. Reposted this AM and re-sent link to Camaster already.

We use this machine every hour of everyday in production. When it stops working I need answers or parts immediately. Waiting is not something most businesses can afford.
Bert as the Admin, i Would see all post, I get everyone everyday on my phone and computer, i look at every one, I can find no log of any post removed that you have written,
__________________
James McGrew
CAMaster ATC 508
The principle of Measure twice cut once has not been replaced by a CNC

www.mcgrewwoodwork.com

https://www.facebook.com/pg/Mcgrew-W...=page_internal

Camera 1 ATC Closeup !
https://video.nest.com/live/esNTrZ
Reply With Quote
  #16  
Old 11-05-2018, 03:15 PM
Bert Wilson Bert Wilson is offline
CAMaster Cobra Owner
 
Join Date: Nov 2013
Location: Ohio
Posts: 12
Default

Quote:
Originally Posted by james mcgrew View Post
Bert as the Admin, i Would see all post, I get everyone everyday on my phone and computer, i look at every one, I can find no log of any post removed that you have written,
Here are screen grabs of the post link data and message:

Bert
Attached Images
File Type: jpg Forum Link.jpg (86.9 KB, 41 views)
File Type: jpg Forum Message.jpg (92.4 KB, 43 views)
__________________
Bert Wilson
H. Gerstner & Sons Inc.
bert@GerstnerUSA.com
CR-510 Cobra HSD 5hp w/ATC
V-VC202 (21) Elmo Rietschle Vacuum Pump
WinCNC + Vcarve Pro
www.GerstnerUSA.com
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 10:41 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.