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Member postings for Brian Rutherford

Here is a list of all the postings Brian Rutherford has made in our forums. Click on a thread name to jump to the thread.

Thread: Power feed - 'which motor shall I buy'?
24/05/2020 17:13:32

By the way Iain the mill table weighs 42kgs. Weighed mine this afternoon.

24/05/2020 17:13:31

By the way Iain the mill table weighs 42kgs. Weighed mine this afternoon.

Thread: Gas Strut for Mill
22/05/2020 09:54:03

Thanks Pete

I have sent the strut back and am replacing with a 400 newton one . Also 50mm shorter, so should be able to fit ok

Thread: Power feed - 'which motor shall I buy'?
21/05/2020 09:25:18

Iain

I have sent you a pm

Thread: Gas Strut for Mill
20/05/2020 23:48:15

Thanks Pete, Seems likely i have the right strut. Not sure if i will be able to fit it as i think i need to compress it an inch to get it in. I'll have another look at it in the morning.

20/05/2020 19:35:21

Ian, that helps a little. The strut on mine failed 12 months ago and it made some difference to raising the head. I want to replace it now for two reasons. One too make it easier on the motor and two, so the head wont drop when the motors arenot under power. Never happened with the acme screw, but will with the ballscrews.

The fact you couldn't compress the strut on your mill makes helps

20/05/2020 17:28:45

Howard just looked at your album. The strut on mine is factory fitted inside the column. I have emailed toolco for the info but had no reply. Their phone  number is discontinued

 

I see you are using 2 struts so i would need to double the value as mine is a single strut

Edited By Brian Rutherford on 20/05/2020 17:36:18

20/05/2020 17:28:44

Thanks for the replies. Howard I bought the 550nm fom SGS but will be exchanging for a lower value one. I know exactly how it fits. What i need to know is what value. If you are using a 15kg one on a Sieg sx2. That equates to approx 150 Nm. I would hazard a guess at the head on yours would weigh about 40 kgs therefore possibly a 200 Nm one might be adequate.

20/05/2020 16:17:47

I have to replace the gas strut on my Toolco on VM32 mill (similar to Warco WM18). Good time to do it as the mill is in bits midway through a CNC conversion. The original gas strut has competely failed and there is no info on the cylinder to tell you the force in newtons to compress it.

I can tell you the weight of the head including motor and saddle is 55kg.

Elsewhere i have read that the strut should be equal to the weight of the head and so i bought a 550 Nm strut but i don't think thats right. I can't even start to compress it. Also the strut will require more force as it compresses the nitrogen. The strut only needs to stop the head falling on the ballscrew. With the acme screw it always stayed put.

The strut is fitted perpendicular inside the column

Your opinions or advice is most welcome

 

Brian

Edited By Brian Rutherford on 20/05/2020 16:18:41

Thread: Recent conversions of Warco WM18 to CNC?
27/03/2020 20:00:42

I started converting my WM32 mill a few weeks ago. Bought the motors and drivers from longs on ebay. No duty to pay as they ship from Germany. Ball screws came from Alibaba. The cost was really cheap for the parts but the air freight and duty and couriers admin charges put the price up..

Not started on the mechanical side yet as have been getting the electrics sorted first. Using a chinese ethernet motion controller which works fine with Mach3.

Will be starting on the mill soon providing I can get material. Ballscrews are the same size as the original acme leadscrews (20mm) so I am contenplating a few problems getting the ball nuts in..

Set myself a budget at the start of £500 to do the 3 axis. Will add a 4 later

Thread: MIDLANDS MODEL ENGINEERING EXHIBITION
16/10/2019 19:21:10

Dissapointed to not be goimg this year. Just had a second knee replacement op. Pity as i waited all year for it. Wanted to check out the model boat club based at kingsbury..

Thread: Chinese dovetail cutter
08/04/2019 16:41:00

I bought a 10mm dovetail cutter for telescopic sight rail in mild steel. Suprised it did the job but took very light cuts

08/04/2019 16:40:59

I bought a 10mm dovetail cutter for telescopic sight rail in mild steel. Suprised it did the job but took very light cuts

Thread: Hardinge lathe on fleabay
20/03/2019 09:06:49

Reduced due to fault . Bent leadscrew or half nut.

Thread: Boiler material
11/03/2019 22:18:37
Posted by Brian Rutherford on 11/03/2019 17:17:14:

I was thinking of using then filled with compressed air for running simple steam engines with a suitable regulator fitted. Filling from a compressor to about 100 bar

Sorry should have said 100 psi

Edited By Brian Rutherford on 11/03/2019 22:19:16

11/03/2019 17:17:14

I was thinking of using then filled with compressed air for running simple steam engines with a suitable regulator fitted. Filling from a compressor to about 100 bar

Thread: Bench grinder
25/08/2018 20:45:09

Yes 400 watt motor. Seen a few posts on here previously recommending them.

I shan't be using it till next week but will post an opinion on it. Putting a green wheel on the old one and will use the coarse wheel for roughing tools out

25/08/2018 10:46:18

Been wanting a new grinder for some time as mine was given to me minus the guards and vibrates quite a bit. Noticed screwfix had dropped the price of their Titan 8" to £35 so picked one up this morning. Surprised they had any left at that price

Thread: Songs for the Workshop
23/07/2018 20:08:52

What about Turn, Turn, Turn by the Byrds?

Thread: Dropping 12v dc to 6v dc
25/05/2018 16:51:54

Google ballast resistor

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