Member postings for Mark Slatter

Hi all,

I'm trying to make myself a set of D1-4 cams to replace the dodgy Chinese ones that were supplied with my lathe. A number of forum members here have been very helpful in supplying the ISO standard drawings with dimensions (thanks again gents!)...however I can't determine what actually describes the cam portion of the part, or if in fact it is actually present on the diagram?! Please have a look at the section on cams from the ISO pdf I was sent. The cross section that shows the eccentric cam portion for the D1-4 cam is the bottom right hand one, the other views I'll include for good measure and the table of dimensions show what I have to work with.

The eccentric cam portion of the part is not actually cylindrical either, so apparently shouldnt be able to be turned on a lathe?

Also what is the "v" value of 250 degrees describing in the D1-4 cross section?

Any help would be appreciated!

Hi Murray,

Many thanks for the drawings, much appreciated!

Hi all,

It seems the D1-4 studs and cams on my newly acquired (new to me, it is a used Chinese 12x36) lathe were manufactured slightly out of specification. The previous owner had used excessive force to try and tighten up the chuck and as a result the studs and cams are heavily galled, the cams do not line up and tighten as they should. I've found a set of replacement studs from RDG Tools which are on their way to me, however finding a set of replacement cams is proving far trickier...does anyone know of a local supplier?

Failing that would anyone have some technical drawings of the D1-4 cams with dimensions as I should be able to make the replacements?

Many thanks!

Hello,

I have the above lathe and and am trying to get my head around the DRO. Its a SINO SDS6, the stock DRO that comes with the lathe. Now research online has said to set the DRO to lathe mode, put the resolution on the X axis to 10, and the resolution on the Z axis to 5, which will then show a reduction in diameter of the part as opposed to a cross slide (radial) movement, which is ideal. Fine. However the X axis now only shows to two decimal places.

Can anyone please tell me how to set this DRO up to show diameter reduction with three decimal places (+/- 5 micron ) on the X axis (which is what the Z axis reads out).

Any help appreciated!

Edited By Mark Slatter on 05/05/2018 18:23:45

Edited By Mark Slatter on 09/10/2017 09:29:03

Hi Folks,

I was going to ask the same queries on the Denford site but thought I would put them here as well, as there is a wealth of knowledge on this forum!

Basically I have no idea what I'm doing lol.

I have acquired a mid 80's green Triac, R8 spindle, no ATC. I'll be primarily using this for prototype development making parts out of steel, and will need to do some 3D machining. I'd like to be able to run Mach 3 on the mill as this software is well supported from a community point of view.

As for parts, I was thinking to use steppers from CNC4You...Nema 23 3.1Nm for the X and Y, and a Nema 23 4Nm for the Z. Are these going to have enough grunt for this mill and application?

Can anyone comment on the CNC4You reccomended drivers, namely the CW5045 (https://www.cnc4you.co.uk/Microstepping-Driver/Stepper-Motor-Driver-4.5A,-50V-CNC-Microstepping-CW5045) ? Any good? The price at £39 each seems good.

An area that is confusing to me is the pplication of a motion controller. I have heard favourable reviews of the CSMIO IP-M...but frankly have no idea why you would need to add this bit of kit. Could someone explain its function to me please? I have seen simple conversions which use stepper drivers linked up to a BoB and all seems well, so why the need for a motion controller?

Another thing I was wondering is what controls the spindle speed on a Triac? Is there a board or card that could be salvaged from the electronics and still be compatible with Mach3?

Any help would be greatly appreciated, as would any suggestions for alternative components and suppliers. I am needing to do this on a tight budget.

Edited By Mark Slatter on 08/10/2017 19:20:55

Many thanks for the replies Nigel, David and Emgee, sorry for only acknowledging it now I've been a bit under the weather. Just as well Ive been lying in bed...those prices for the Easy Change toolholders are shocking!! I managed to get a few tooldholders with the mill however:

It includes a ER32, ER25 and two ER16 collet holders, and a couple of other holders. A few hundred quids worth just in that lot! The owner was saying he might want something for the tooling...with those prices for extras I think I might consider selling them and making up some Tormach TTS style holders...it would work out cheaper in the long run I reckon.

What do you think this is...I havnt had a chance to open it up and see what the collet looks like...but if its just a collet holder it seems a strange shape?

Edited By Mark Slatter on 08/10/2017 18:46:48

Edited By Mark Slatter on 08/10/2017 18:49:03

Edited By Mark Slatter on 08/10/2017 18:55:37

Edited By Mark Slatter on 03/10/2017 20:14:45