Seig sx2p mill

[BOB BLACKSHAW 1Participant @bobblackshaw1]

Hello, Ive had my Seig sx2p mill for over ten years and hasn’t caused any problems in that time. The problem is that when taking a milling cut of a third width of the cutter it sometimes just cuts out, I restart and works ok,its become a intermittent problem, any idea of the problem please. Are spares for this mill hard to come by now Arc have ceased trading.

Thanks Bob

[Ches Green UKParticipant @chesgreenuk]

Bob,

I had a similar problem with my Arc SX2P mill.  The forum members were very helpful.

Here is the thread…. Seig SX2P mill cutting out – https://www.model-engineer.co.uk/forums/topic/seig-sx2p-mill-cutting-out/

This is a summary of what I did to fix the issue….it wasn’t cheap, but the mill has been fine for over a year now.

Parts replaced…

– Speed control potentiometer, supplied by AliExpress – no difference made

– Main control board, supplied by Axminster Tools – no difference made

– On/Off switch, supplied by Axminster tools – no difference made

– 500W brushless DC motor, supplied by Axminster tools – Fault now no longer apparent. Mill has been test run for about a total of 1hr over a few days without issue.

And here is another thread on a similar subject…. Sieg SX2PG Mill –  https://www.model-engineer.co.uk/forums/topic/sieg-sx2pg-mill-2/

Ches

[BOB BLACKSHAW 1Participant @bobblackshaw1]

Thanks for the reply Ches,

That’s an expensive list of parts to finally solve the problem. The motor is the problem, mine was working fine yesterday with just one stop, Ill see how it goes over the next week. Thanks for identifying the problem as not being very confidant with electronics I would have brought a new mill.

The SX2p mill looking back I’ve had it about 12 years with no issues like you fitted a DRO and gas struts, my only gripe with the mill is positioning of the vice on the table. The head of the machine could be 2 inches longer as the vice is bolted on the third bolt slots, if the vice was bolted on the middle slot to much of the table is moved back on the slides.

I’ve only milled once using the whole table with out the vice, that was a base casting that I milled this week, so really that’s the design  of the SX2p why the head is positioned as it is for full table milling option, but as I’ve said used once.

Bob

[Ches Green UKParticipant @chesgreenuk]

That’s an expensive list of parts to finally solve the problem.

Yes, it certainly was. The mill is about 6 yrs old and lives in a building that gets exposed to humidity fluctuations in the winter. I suspect I used it whilst there was condensate on the motor electrics.

My mill fault was that once a week the motor would hiccup for a second or so, then the hiccup started happening more frequently and for longer…after a month or so the problem had made the mill very unreliable.

Anyway, the mill has worked well since I fixed it and, expensive as it was, I feel I’m still getting my money’s worth.  And I’ve got some used spare parts that might come in handy one day 🙂

Ches

[JasonBModerator @jasonb]

Although you say it happens when using 1/3rd or more width of the cutter you don’t say the diameter of the cutter, type of cutter, depth of cut or material so hard to know what load it is being affected by.

If it is happening as you try to take larger cuts it may be that the built in overload is tripping too soon or you are simply taking too big a cut for the machine.

[BOB BLACKSHAW 1Participant @bobblackshaw1]

Using a 8mm end mill on Gun metal .5mm depth. As I’ve said first time this has happened in 12 years and have made over 15 engines from bar stock so I know this machines capacity.

Ive brought a Kennions Tina engine, first time with castings, so taking my time not to balls up.

Bob

[JasonBModerator @jasonb]

It should certainly be well up for a light cut like that. If you have them the uncoated milling cutters with the steeper helix angle for Aluminium work very well on GM, just make sure whatever you use is sharp as GM castings can be a bit soft and bend away from a blunt cutter as I learnt early on😚

Keep us posted of your progress with Tina.

[Ches Green UKParticipant @chesgreenuk]

Yes, the Kennions Tina engine looks very interesting.

Ches

[Author]

Posts