MYCNCUK

CNC Kits

itbookham — Tue, 10 Nov 2009 10:09:05 GMT

Hello,

Is there a company in the UK that sells CNC kits for the 7 x 12 mini-lathe and Sieg X1 mill?

Many thanks,
Mark

Good evening.

itbookham — Mon, 09 Nov 2009 23:18:31 GMT

Hello,

I am new to this Forum and would like to say hello to everyone.

I am very much a hobby machinist. My small workshop houses a Chester Conquest lathe and a Sieg X1 mill.

At the moment I am working on a 2" Clayton Steam Wagon.

I have been toying with the idea of setting up CNC on the lathe and mill. I would be grateful for advice and suggestions on whether it is practical on these types of machines.

Many thanks for listening.

Regards,
Mark

Help! DIY 4 amp L297/6203 driver

Ross77 — Mon, 09 Nov 2009 21:26:40 GMT

Hi All

Im looking to build a new stepper driver for my mill project. The original board used an L297 driver and 2x L6203 H bridge output stage. I'm hoping to build something similar and have found a few circuits on the net.

I have also found some nice additions to the basic circuit like overload protection for the output chips (good idea since I fried them on the last board :smile:) and varable voltage for VREF to increase Half step torque.

The circuit i have used i heavilly based on one I got from an old thread on cnczone but I'm unsure what the Pic chip dose (i asume it detects the clock pulse and varies the VREF accordingly)

So Question 1. can anyone help with a replacement circuit for the PIC chip as I dont want to use PIC chips for this project.?

And Question 2. Can some check over my version to make sure it works or suggest an alternative?

Thanks in advance

Attached Thumbnails

Z Problem

airwolf — Mon, 09 Nov 2009 20:51:24 GMT

Hi new to this so please bear with me.
have a problem when cutting multi passes on the z.
all runs fine and then it will add 10mm plunge on the z.
getting use to g code cant see a problem there

please any reson why it would do this

thanks Airwolf:feedback:

2M880N series high performance stepper drivers

Gary — Mon, 09 Nov 2009 14:20:50 GMT

The 2M880N is suitable for a wide range of stepping motors including our SY57 and SY85 and is ideal for any application that requires a High performance but very low cost microstepping driver.

The 2M880N digital stepper driver is a step forward in stepper driver technology.
The N series offers far superior performance over traditional stepper drivers, and offers very smooth motion, that is until now unseen with stepper drivers; and this is due to the advanced current control and the autotune function.

N series drivers are the latest digital high-resolution stepper motor drivers incorporating DSP single-chip microcomputer as the control core, these products adopt vector current control algorithm and are suitable for driving 2-phase hybrid stepper motors under various brand names. The application of advanced vector control algorithm greatly reduces noise and vibration of the motors during operation, and enables the stepper motors to deliver a noise and stability level comparable to that of servo motors. The brand-new heatsink design enables the drivers to meet the strict safety requirements while keeping a compact structure.

Specification

* 8A current rating
* 24-70V DC supply
* Autotune function for improved smoothness and performance.
* Over-voltage, under-voltage, short circuit, overheat protection.

For further details you can download the user manual from the product page within the following link.
http://www.slidesandballscrews.com/2...ver-p-303.html

2M2280N 230V AC, high performance stepper driver

Gary — Mon, 09 Nov 2009 14:19:06 GMT

The 2M2280N is suitable for a wide range of stepping motors and is ideal for our SY85 range. The 2M2280N is best suited for applications that requires a very high motor speed while maintaining smooth performance and high torque.

The 2M2280N digital stepper driver is a step forward in stepper driver technology.
The N series offers far superior performance over traditional stepper drivers, and offers very smooth motion, that is until now unseen with stepper drivers; and this is due to the advanced current control and the autotune function

N series drivers are the latest digital high-resolution stepper motor drivers incorporating DSP single-chip microcomputer as the control core, these products adopt vector current control algorithm and are suitable for driving 2-phase hybrid stepper motors under various brand names. The application of advanced vector control algorithm greatly reduces noise and vibration of the motors during operation, and enables the stepper motors to deliver a noise and stability level comparable to that of servo motors.
Specification

* High quality, low price.
* 8A current rating
* 187-253 V AC
* Clock / Direction or CW/CCW control Signal.
* Up to 128 microsteps per step.
* TTL compatible and Opto-isolated inputs.
* Autotune function for improved smoothness and performance.
* Over-voltage, under-voltage, short circuit, overheat protection.

For more information you can download the user manual from the product page within the following link.
http://www.slidesandballscrews.com/2...ver-p-304.html

Mini Lathe - which collect type (& chuck) should I go for?

HankMcSpank — Mon, 09 Nov 2009 11:37:20 GMT

Ok, so I bought a mini lathe off Ebay ...which came without a chuck. Now I'm clueless about a lot of things in life & I put lathes in that category. A lot of reading ensued the outcome being I though a 4 jaw independent chuck would be my best option - quack, quack oops ...it's such a chore to use, that I'd rather drill my kneecaps than have to go through the arse of lining a bit of material up! (which means it's not getting any use)

Now, since I mainly work with small round bar type stuff...I now realise that a collect chuck would be a far better (quicker!) option.

But I'm overwhelmed at the options...can any of you good folk here, help me choose the 'best bang per buck'.

My mini Axminister (C2 300A) lathe has an MT3 spindle, I envisage working with round bar in the region of 3mm-10mm.

This is just a hobby & I'm not a heavy user, so I don't want to pay a massive premium for top notch quality, but I don't want to be cursing everytime I change a collet either!

Many thanks!

Magnetic slide of Z-axis

Constantine — Sun, 08 Nov 2009 17:07:36 GMT

Hi fellows, I'm new here.
I've checked some of your threads, and could probably contribute a bit.

The machine was designed for wood, plastic, soft metalls,
working envelope 200*230*65mm

fancy solution (miiiinnnneee :) ))) of Z-axis - neodymium magnets + Teflon as the slides and polished metal plate. the force required to tear it off - 20kg, to slide it - 2 kg, works pretty fine, no backlash at all ;) .

a bit of history in pictures, + work done so far.

X, Y axis - built using hardened 300mm D=12mm Thompson rods,
linear ball bearings, plastic bushings,
tools used for the build - lathe, milling machine, drilling machine, digital calliper, common sense.

Attachment 1103 Attachment 1104 Attachment 1105

Attachment 1106 Attachment 1107 Attachment 1108

Attachment 1109 Attachment 1110 Attachment 1111

Attachment 1112 Attachment 1113 Attachment 1114

Attachment 1115 Attachment 1116

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hello everyone

Andre — Sun, 08 Nov 2009 05:41:24 GMT

Hello all my name is Andre and I metalworker by profession and doing CNC milling on a milling machine SHW with a Heidenhain control.
We usually program them directly to the machine or with a cam module.
I hope here in the forum to find information on converting a conventional milling machine to CNC.
Kind regards Andre

z axis loosing steps

ptjw7uk — Fri, 06 Nov 2009 17:09:44 GMT

Hi All
Got back to playing with my cnc mill. Tried to do some engraving but as the engraving proceeds accross the x axis the cutting depth gets greater so I assume the z axis is loosing steps.
How is one supposed to test for this, I think I should try a dial gauge.

Peter

Hi All

ChrisG — Fri, 06 Nov 2009 13:44:02 GMT

Hi all,

I'm a newbe on this community.

I have a 12year+ old Step4 router, not brilliant but ok for balsa, ply without knots. Fitted a cheepo 240v router, will cut any ply, plastics now. The weight and offset of the spindle from the yaxis guides makes it abit wobbley. It's in semi retirement at the moment, shall make new spindle using air grinder innerds driven by a belted Brushless 400w motor and set guides one above the other.

2 weeks ago I got an X1 mill from Arc-Euro with DIYCNC.co.uk lecy bits up and running so now I can make parts for Step4.

Software is:-

DoubleCad XT free! only 2D but a good cheap start.

Cut2d - Wonderfully straight forwards. One weekend I tried 3 different CAM sample programs, the next Thurs I used them again and found Cut2D was the only one I could use without cursing.

Mach 3 - Another good Prog.

CNCly
Chris

new to cnc

chip — Fri, 06 Nov 2009 12:45:58 GMT

wrong section sorry

Dumpster CNC

Vic66 — Fri, 06 Nov 2009 07:07:43 GMT

Just wondered if anyone has ordered parts from Dumpster Cnc before and if so what sort of customs aggravation (if any) was there? I'm after anti-backlash nuts and a few of his other items, they look exactly what I'm after, well priced as well, havent managed to find any thing similar in UK based retailers, unless google has missed them :wink:

Cheers
Vic

Hi From Oxfordshire

Vic66 — Fri, 06 Nov 2009 07:00:10 GMT

Hello all

Been lurking for a while and thought I'd better show my ugly mug :whistling:

Built a Rockliffe ish router early part of this year and got the bug, currently designing my own router along similar lines to Joes Hybrid but trying to use parts that we have kicking about at work, very much a beginner at cnc.

Vic :beer:

I Need Help Help Please my web is broke

cncezee — Wed, 04 Nov 2009 21:02:43 GMT

Help please; Somewhere in UK there is either a blacklisted server or a broken link to my website www.cnc.me.uk

This is not a request for loads of visitors but I would appreciate if you can look to see if you can access my site, if you can please email me roger.hampson@(antispam)btconnect.com (remove antispam) giving your isp and county, I do not want to know who you are.
but more importantly I need to know if you cannot see my site as I can use this information to blast my isp into doing something about it.

Please uk only

Dear moderator, this is a genuine request, I apologize if it is in the wrong place or if it is against the rules, but I cannot see my own site, and I cannot do anything about it unless I can draw a map showing blackout spots:mad: