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Topics - bwprice100

Pages: 1 2 »
1
General Mach Discussion / Increase axis drive speed
« on: July 19, 2020, 09:27:35 AM »
Hi

I haven't posted on the forum for a while due to illness but I would like some help please.

I have added an intermediate pulley to my X axis and re-calibrated the drive so the distance moved is correct  but now the axis is moving too slowly and I can't speed it up as the drive settings are at their maximum so I am not sure how to speed up the axis further.

Any help much appreciated.

Brian

2
Show"N"Tell ( What you have made with your CNC machine.) / BMW badges
« on: February 27, 2015, 11:13:38 AM »
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I have not posted here for a while but thought I would share some work I have been doing for my motorbike.

Brian

3
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Hi All

I thought before the year ends i would post some details of my CNC mill.
See the standard YouTube video here.
http://www.youtube.com/watch?v=qpSji_Dqftw&feature=youtu.be

A bit about the machine:

It is based on an old Taylor Hobson engraving machine, the type with the big pantograph sat on the top. The reason for using this is simple, I was given it for free and it was in excellent condition.

I removed the pantograph and made some brackets to fit a spindle head from here
http://littlemachineshop.com/products/product_view.php?ProductID=1663
I bought it a while ago when the dollar to Sterling exchange rate was good.

I originally planned to use it as a manual machine so fitted a DRO with glass slides (it proved very handy when setting up the CNC side) I bought it direct from China from one of my suppliers and is very impressive and has loads of functionality.
You may notice the square plastic drain pipe swarf guards over the glass slide.

Having already been aware of mach3 software I very quickly decided to take the plunge and convert it to CNC so I contacted Lester at MEDW and bought one of his ‘Mach in a box’ systems, see here http://medw.co.uk/wiki/?page=Mach-in-a-box
I bought the power supplies, break out boards, motor drivers and motors from Lester as well.

The break out boards are Lester own design but the motors and drivers are these.
http://www.arceurotrade.co.uk/Catalogue/Stepper-Motors

I found it all very easy to set up and Lester was very helpful and good in addressing any problems.

I also bought a breakout boards, motors and drivers for my lathe but I have not finished that yet. There is also a rotary axis for the mill that I bought from Arc Euro trade
http://www.arceurotrade.co.uk/Catalogue/Workholding/Rotary-Tables

It has been great fun building it and I have been able to do paid work on it as well.

There is still some additional wiring I want to do on it and I may do a completely new electrical cabinet for it. The electronics are presently mounted in a steel medicine cabinet (a free salvage item) and the cabinet is mounted on the wall above the machine. I really need to move the screen to a lower level as it is difficult to look at the machine and the screen without getting a sore neck.

I am hanging back on making any major changes to it at the moment as the Taylor Hobson machine has some limitation, which may persuade me to build my own mechanical slide ways etc.

First the Y axis is very short with only about 60mm of useful travel, secondly the slide way are not good for continuous movement. The way the original machine was used was to move the table to just present the work piece and then lock it in position and do all the movement with the pantograph. Basically the slide ways have to be left slack or they bind. This could be improved by scraping the slide ways in but I am starting to think it may not be worth the effort because of the limited Y axis travel.

Anyway I thought I might share it with you.

Brian

4
Forum suggestions and report forum problems. / Resources Links page
« on: October 25, 2011, 08:12:26 AM »
What happened to the Links page under the resources tab?

Brian

5
General Mach Discussion / Missing lines of Gcode
« on: July 23, 2010, 10:48:39 AM »
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I am having a strange proble with Mach 3 missing out lines of Gcode. i am using the following gcode to put a chamfer on the end of a hex bar but every now and again complete lines of code are just missed out. It is not always the same lines but as soon as I go to the MDI window the axis move no problem. For example it will sometimes miss out line 8 and sometimes line 6

Any thoughts much appreciated

Brian


1 G00 Z6
2 G00 X15.5 Y25
3 G00 X15.5 Y0
4 G01 Z0 F30
5 G01 Z-1 F10
6 G17 G03 X15.5 Y0 I-15.5 J0 F35
7 G00 Z6
8 G00 X15.5 Y25
9 M30

6
G-Code, CAD, and CAM discussions / Gcode pause
« on: July 19, 2010, 12:16:58 PM »
Hi

I am using the Gcode below to face a block on my mill. When I test it on my laptop it runs continuous whilst it does the spiral but when I run the same code on my mill, with the same xml file it keeps pausing at each quadrant of the spiral. It doesn't pause for long, about a second, but i was wondering why it does it?

Thanks in advance for any suggestions.

Brian

=========================

G0 G49 G40  G17 G80 G50 G90
M6 T0(TOOL DIA.10)
G64
G21 (mm)
M03 S0
G00 G43 H0  Z1
X0 Y25
G00 Z-0.95
G00 Y20
G01 Y0 F20
G01 Z-1 F5
G2 Y0 X2 R1 F30
Y0 X-2 R2
Y0 X4 R3
Y0 X-4 R4
G2 Y0 X6 R5 F50
Y0 X-6 R6
Y0 X8 R7
G2 Y0 X-8 R8 F70
Y0 X10 R9
Y0 X-10 R10
X10 Y0 R10
Y-1 X9 R1
G00 Z1
M5 M9
G00 X0 Y25
M30
========================

7
General Mach Discussion / True 4 axis milling
« on: July 15, 2010, 03:03:39 AM »
Hi All

Just a quick question (so much to learn)

I am just starting to get my 4 axis mill conversion up and running and I have started to use MeshCam to do some programming. Now it is is a very good program but it only seems to use the 4 axis to rotate the part before continuing with machining using the X,Y&Z i.e. no machining is done while the Rotary axis is moving.

The question is does anyone have examples of Mach3 machining with all 4 axis (3 linear and 1 rotary) moving and what CAM package did they use for this?

Thanks Brian

8
G-Code, CAD, and CAM discussions / G0 X0 or G0 X0.0
« on: July 12, 2010, 11:25:08 AM »
Hi

New to Gcode programming but I get the following inconsistency.

On the MDI screen sometimes an axis will go to zero whether I use G0 X0 or G0 X0.0 but some it will only work if I input G0 X0.0 and sometime I can only get the axis to move if I use G0 X-0.0

Why?

Brian

9
General Mach Discussion / Licence restrictions
« on: June 16, 2010, 12:29:43 PM »
.
Hi All

Been a while since my last post as I have been busy getting my lathe and mill up and running; getting there with motors driving the mill. I will post some pictures soon.

I have a question concerning the licence I have for my Mach3 installation.

I am using the software for business use and would like to do some programming with Lazy ca, Mach3 and write text wizard on my note book which is not connected to a machine.
Is this possible and secondly is it permited. At present Lazy cam and the write wizard seem to be in demo mode.

Cheers Brian

10
General Mach Discussion / CNC screw cutting lathe advice
« on: June 29, 2009, 01:25:23 PM »
Hi All

I am not sure if this is the correct place to post but I am looking for advice on purchasing a small CNC screw cutting lathe/system. I am looking for something out of the box that requires minimal set up and it is mainly to be used for cutting stainless steel.
I have seen this system
http://www.cadcamcadcam.com/sherline4400-cnc35x17cncreadylathe.aspx
and they do a spindle encoder that allows cnc screw cutting but what do you guys think or are ther alternatives.

All advice much appreciated.

Brian

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