topic Re: 2020 Doosan Lynx 2100 LSYB in HSM Post Processor Forum

2020 Doosan Lynx 2100 LSYB

Dave_Moxham1 — Thu, 12 Mar 2020 19:17:07 GMT

Hello there,

I have a brand new Doosan Lynx 2100 LSYB with barfeed arriving on the floor next week.

I'm fully in at the deep end, with no real CNC turning experience (but plenty of milling experience, and a fair bit of post editing in Fusion/Inventor HSM).

How are people with newer Lynx lathes, particularly sub spindle machines, finding the integration with the stock post and what edits have you found necessary? I'd be very interested to hear from @LibertyMachine and anyone else who would care to share their experiences.

There are some long skinny shafts I'm going to have to put on there at some point, so I'd love to hear from anyone who is successfully using sub spindle supported turning with multiple staged barfeeds programmed in Fusion or HSM.

I imagine there are going to be quite a few work arounds to get the most out of this machine when programming with Fusion, so if anyone has any ideas to share along those lines, I'd be super grateful. I'm at the overwhelmed stage, questioning why I have bought a machine with so much to think about and to go wrong (I've also just had an order cancelled due to customer worrying about potential Coronavirus shutdown), but at the same time, I can't wait to get stuck in!

Thanks in advance.

Re: 2020 Doosan Lynx 2100 LSYB

seth.madore — Thu, 12 Mar 2020 21:11:19 GMT

I wouldn't trust that Liberty Machine character....he seems sketchy 😂

Yeah, so i was basically in the same boat as you; no real turning experience on "simple" mill/turn machines. Let me tell you, the Mori NTX 9-axis was a LOT easier to get around in and make magic happen!

Anyways, let me share what I've learned thus far;

Bar pull in Fusion needs work. You can make it happen, just need to work simple math out and a small amount of Manual NC and Secondary Chuck/Retract programming. Some of it I'm still working out, as most of my work has been "simple" main side > sub-transfer > part > sub finish type work.

How long and slender are you talking? I did some .600 dia x 8" long shafts in one setup, using a Royal Multi-Task spring loaded center. Worked slicker than....yeah, it worked well!

Did you go with options such as QG-65 collet systems, and did you spring for a tooling voucher to addon to your collection of live tools? I'm since picked up 2 additional radial and one axial holder (MD Tooling) and I may buy one more axial, but I might go with a sub-spindle oriented one this time.

Out of the box, the post is working fairly well. I did find a bug where spindle speeds weren't being posted when both chucks were synced (M203). I think that's since been fixed. Of course, I made a fair amount of "flavor" edits to the post, just to better suit my expectations:
1) Added another M110 call AFTER each Nxx number. I often rerun tools, and having the M110 there saves a fair amount of aggravation

2) I moved the tool comment up to the Nxx line so I could see what was actually being called for

3) I still need to move some coolant and spindle (off) codes to a better spot, just to save a few seconds here and there. Coolant tends to flow for a few seconds after the M9, so that should keep my hands a bit cleaner 🙂

Re: 2020 Doosan Lynx 2100 LSYB

Dave_Moxham1 — Fri, 13 Mar 2020 19:51:22 GMT

@seth.madore wrote:
I wouldn't trust that Liberty Machine character....he seems sketchy 😂

Yeah, I think he's stolen your profile pic..... I'd much rather be in the capable hands of an Autodesk employee anyway! 😉

Thank you very much for your detailed reply Seth.

Bar pull in Fusion needs work. You can make it happen, just need to work simple math out and a small amount of Manual NC and Secondary Chuck/Retract programming. Some of it I'm still working out, as most of my work has been "simple" main side > sub-transfer > part > sub finish type work.
How long and slender are you talking?

The part in question is 7.8mm in diameter by 97mm long (0.300"x4" ish). It has a 3mm diameter on one end and a 4mm diameter stepped to 5.5mm on the other with a 25xD, 2mm hole going through the middle (I could maybe get a very small lead in this hole for a centre). There are also a bunch of tightly toleranced grooves to contend with.

I was thinking along the lines of:

Turn 4mm, 5.5mm and 7.8mm diameter up to the first groove, drill hole, bar pull with sub.
Turn remaining 7.8mm diameter and grooves with sub spindle support.
Advance sub and part off, finish back end on sub.
It's going to be fun getting tools in there to do all that, but possible I think/hope! 😕

Would programming a part like above, be a case of using separate setups in Fusion for each advancement of the bar, adjusting your WCS in each setup to reflect the distance you have pulled? All bar pulls would be hand coded in Manual NC?

I've got a collet chuck coming, but only for the main spindle at the moment. I've already bitten the bullet and bought 2 extra radial and 2 double sided axial live tools. That gives me 4 radial, 4 axial - main and 3 axial - sub. It's pointless buying a machine like that and not tooling it up properly!