Stick-slip
Stick-slip means the saddle breaks loose in jerks instead of starting smoothly. It is most obvious at slow feeds and light cuts.
- When the axis starts
- Slow feeds
On site
Hand scraping of machine tool ways
Scraped untilit measures right.
The ways are rescraped by hand on site, with no shipping and no major teardown. Kemal Özyildiz has been doing this work for over 40 years.
Machine tools from 3 tonnes only.
Current workSee current work1/ 3
40+years in the trade
Recently on site at
- BoschBursa / Homburg
- KlingelnbergHückeswagen
- Kapp NilesCoburg
- A. KlinkPforzheim-Eutingen
- HoffmannPforzheim
- ZellerDitzingen
- BEMAKirchheim unter Teck
- Friesenear Coburg
- Prokon:CEnear Coburg
- JFAAschaffenburg
Spotting wear
Signs of worn machine ways
If speed, feed and tooling are right and the chatter marks stay, the cause is under the saddle.
Size drifts along the table
The same setting gives different sizes depending on where on the bed you cut. The error follows the wear on the way.
- Along the travel
- Size error
Chatter marks
On the workpiece
Chatter marks are regular waves on the machined surface, usually in the feed direction. When the saddle runs on a way that has worn hollow, they show up first where it spends most of its time.
The gib no longer adjusts evenly
The gib on a dovetail way takes up the play in one spot and binds in the next. When no setting fits along the whole travel, the way has worn hollow.
- When adjusting the gib
- Dovetail
What I overhaul, and advice
The work happens on the installed machine, from taking the geometry to measuring it again afterward. The machines are surface grinders and cylindrical grinders, milling machines and lathes.
Machine way repair
I measure the way, rework it and measure it again. On beds, saddles and rotary tables.
Go to the service page: Machine way repair
Way scraping
By hand, stroke by stroke. Also on ways that have worn far out of tolerance.
Go to the service page: Way scraping
Machine tool rebuilding
Reworked and set up again until the machine holds its geometry.
Go to the service page: Machine tool rebuildingMachine tool alignment
Back to level and back to geometry after relocation or a new installation.
Go to the service page: Machine tool alignment
Way liner replacement
A new liner on the mating way, then scraped in.
Go to the service page: Way liner replacement
Machine tool inspection report
I record the readings and hand them over. You don’t have to judge the work by looking at the surface.
Go to the service page: Machine tool inspection reportOverhaul
- Scraping guideways on the machine bed and table
- Aligning and leveling the machine bed
- Scraping the mounting surfaces for linear guides
- Lapping hardened guideways on the cross rail
- Scraping surface plates
- Replacing way liners
Advice
- Advice on buying a new machine
- Advice after buying or selling new machines
- Advice on foundation, anchoring and climate control
- Advice before and after relocating a machine
- Inspection report
Machines
Which machine tools are worked on?
Grinders and milling machines, boring mills and lathes. The makes below were under the scraper most recently. The list is not complete.
Surface grinders
- Waldrich Coburg
- ELB-Schliff
- Okamoto
- ABA
- Ziersch
Cylindrical grinders
- Tschudin
- Kellenberger
- Fortuna
- Naxos-Union
- Herkules
Milling machines
- Hermle
- Doosan
- Deckel
- Waldrich Coburg
Boring mills
- TOS
- Union
- Wotan
- Trimill
Lathes
- VDF
- Schaublin
- and other makes
Installation and alignment
Who aligns the machine after relocation?
A rigging company moves the machine into place. It is then aligned with an electronic level and a dial indicator, and whatever can’t be corrected at the feet is scraped on the spot.
Before relocation
Advice on the machine’s new location:
- Foundation and anchoring
- Climate control
- Buying a new machine
After relocation
Alignment on the installed machine:
- Machine bed leveled at its feet
- Geometry measured axis by axis
- Scraped where it is out of tolerance
- Inspection report before and after
Measuring equipment
What I measure with, and what you keep
Every way is spotted and measured with an electronic level and a dial indicator, before the work and after it. The spotting is the gauge.
Inspection report
- Electronic level TESA NIVELTRONIC
- Measuring bridge
- Dial indicator
Our work
What does a scraped machine way look like?
Even spotting over the full length, on a bed as on a rotary table. Everything here was photographed on the job, each photo with the part and the step.
Spotting
Rotary table with ring gear
See all workBoth circular ways spotted, contact checked
- Measuring equipment: Spotting blue
- Photographed on the job
Measurement
Boehringer lathe
See all workBed measured, indicator stand on the granite straightedge
- Measuring equipment: Granite straightedge, indicator stand
- Photographed on the job
Measurement
Long bed in the shop
See all workLevel on the straightedge, way measured
- Measuring equipment: NIVELTRONIC
- Photographed on the job
Process
How a job runs, in 3 steps
Three steps, from the phone call to the inspection report. The machine stays where it is.
The video is hosted on YouTube. Only when you start it does your browser connect to YouTube (Google). Your IP address is transmitted, and YouTube may set cookies. More in the privacy policy
Hand scrapingon a machine way.
Length:1 min 55 s
- 01
You describe the machine and what it shows
A call or an email is enough: which machine it is, what it is doing and where it stands.
- 02
Measuring and scraping on the installed machine
The way is spotted and measured, then scraped where the machine stands. There is no shipping and no major teardown.
- 03
Sign-off with measured values
The same geometry is measured again. You get the spotting and the measured values as an inspection report.
years in the trade
40+
About me
Who will scrape your machine, and why me
Kemal. That’s me in the photo, and that’s how you’ll find me at your machine: scraper in hand, where the machine stands.
On site, no shipping
I scrape on the installed machine. There is no shipping and no major teardown.
Measured before and after
Spotting, electronic level and dial indicator. You get the values as an inspection report.
You talk to me
When you call, you talk to the person who will later stand at your machine.
Worldwide and in Mühlacker
I come to you, abroad as well. A bed that is already out I scrape in my workshop.
Frequently asked questions
Questions before the first job
Usually the same ones: whether the machine has to come out, and what you have in hand at the end. Anything not covered here gets settled with a phone call.
1. Does the machine have to be torn down and shipped out for scraping?
No. I scrape on the installed machine, at your plant, anywhere in the world. Nothing gets shipped, and nothing has to be realigned afterward. The way is measured and scraped where it will run later.
2. Scraping or grinding: which is right for worn ways?
To grind a bed, it has to come out and go on a grinder. I scrape it in the machine, clamped and set up the way it will work afterward. The spotting is taken on that machine, not on a fixture.
3. How long is the machine down?
That depends on the machine: how long the ways are, how badly they are worn and what needs doing besides scraping. I give you a reliable duration after the on-site inspection. There is no shipping and no major teardown, because I work on the machine where it stands.
4. How is it measured, and what do I get in writing?
Every way is spotted and measured with an electronic level and a dial indicator, before the work and again at sign-off. You get the spotting and the measured values as an inspection report. I don’t offer laser measurement.
5. How accurate is hand scraping?
Hand scraping can reach 0.0001 mm, which is 0.1 µm. We agree the target value for your machine before the work, and I measure it afterward. The result is in the inspection report you get at sign-off.
6. Which machines do you scrape?
Surface and cylindrical grinders, milling machines, lathes and boring mills. Recent jobs included machines from Waldrich Coburg, Okamoto, Kellenberger, Deckel and TOS. I work on beds, saddles and rotary tables, as well as the way liner on the saddle and leveling from the foundation. I don’t do retrofits. Machine tools from 3 tonnes only.
7. Do you also take a bed or a single saddle that is already out of the machine?
Yes. A bed that is already out is set up on stands in my workshop in Mühlacker and scraped there. It is measured the same way as on an installed machine.
8. How much does it cost to scrape machine ways?
By agreement, for each machine individually. There is no price list. Call and tell me which machine it is, and we’ll talk about the price.
Contact
What is your machine showing?
Machine tools from 3 tonnes only.
- Call+49 172 7791782
- Emailinfoschaberkemal.de
- WorkshopKißlingweg 26, D-75417 Mühlacker