HTC 950 RX User manual

v.3

1
Introduction
The HTC 950 RX™ is the most advanced mobile grinder in the world which by denition also makes it the fastest in the
world. Its predecessor, the HTC 800, revolutionised the market in 1992.
Since then, HTC has manufactured over 4,000 grinders, making us the market leader within the eld.
The new HTC 950 RX™ represents a milestone not just for HTC, but also for the entire industry that was started with the
launch of the very rst professional grinder. The HTC 950 RX™ boasts a range of new functions to facilitate working with
the machine while increasing capacity without the need for more personnel. Please read this manual to help you get the
most out of your new grinder.
Sten Jeansson
Managing Director

2
Liability
• Although all possible measures have been taken to ensure the accuracy and completeness of the information pre-
sented in this manual, we do not accept any responsibility or liability for errors or missing information. HTC reserves
the right to alter descriptions in this manual without prior notice.
• This manual is protected by copyright and no part may be copied or in any way used without the express written per-
mission of HTC.
Trademark
The HTC trademark is owned by HTC Sweden AB. Other names and products mentioned in this manual may be registered
trademarks of their respective companies.
© 2004 HTC Sweden AB. Sole rights.

3
Introduction ............................................................................................................................................................................................1
Liability ......................................................................................................................................................................................................2
Trademark................................................................................................................................................................................................2
Warranty....................................................................................................................................................................................................6
The manual..............................................................................................................................................................................................6
Safety ..........................................................................................................................................................................................................7
Vibration and noise...........................................................................................................................................................................8
Machine plate ........................................................................................................................................................................................8
Unpacking the machine.................................................................................................................................................................9
CE marking..............................................................................................................................................................................................9
Declaration of Conformity..........................................................................................................................................................10
HTC 950 RX™...................................................................................................................................................................................... 11
Description of the machine.......................................................................................................................................................12
Function description of machine components ..........................................................................................................13
1. Drive lock:.......................................................................................................................................................................................13
2. Motor box drive:...........................................................................................................................................................................13
3. Electrical cabinet:........................................................................................................................................................................13
4. Weight lock:...................................................................................................................................................................................13
5. Connection, extractor:...............................................................................................................................................................13
6. 32A Connection, elec:................................................................................................................................................................13
7. Control panel: ...............................................................................................................................................................................13
8. Handle:.............................................................................................................................................................................................13
9. Handle locking: ............................................................................................................................................................................13
10. Lifting eye: ...................................................................................................................................................................................13
11. Front cover: .................................................................................................................................................................................13
12. Motor:.............................................................................................................................................................................................13
13. Weight: ..........................................................................................................................................................................................13
14. Grinding cover: ..........................................................................................................................................................................13
15. Water connection:.....................................................................................................................................................................13
16. Weight lock (see item 4) ........................................................................................................................................................13
17. Splash guard: .............................................................................................................................................................................13
Control panel on the machine.................................................................................................................................................14

4
Control description - Control panel....................................................................................................................................15
1. Standby indicator - Power:......................................................................................................................................................15
2. Overload indicator:.....................................................................................................................................................................15
3. Communication error indicator - Com Error:...................................................................................................................15
4. Radio control indicator - Radio Enabled: ..........................................................................................................................15
5. Radio control On/Off:.................................................................................................................................................................15
6. Adjustment of rotational speed of the grinding head - Speed (Grinding Head Speed): ................................15
7. Start/Stop of the rotation of the grinding head - Start/Stop (Grinding Head): ...................................................15
8. Emergency Stop - EM-Stop:....................................................................................................................................................15
9. Ignition switch (Standby):........................................................................................................................................................15
Radio control unit ............................................................................................................................................................................16
Description of controls – Radio control unit..........................................................................................................17
1. OFF/ON, Emergency stop ........................................................................................................................................................17
2. Steering control ...........................................................................................................................................................................17
3. Frequency button ........................................................................................................................................................................17
4. Grinding head rpm......................................................................................................................................................................17
5. Grinding head OFF/ON..............................................................................................................................................................17
6. Battery LED....................................................................................................................................................................................17
7. Radio LED.......................................................................................................................................................................................17
8. Battery..............................................................................................................................................................................................17
9. Speed, motion...............................................................................................................................................................................17
10. Motion, fwd/rev...........................................................................................................................................................................17
11. Adjustment, control..................................................................................................................................................................17
12. Start Radio ...................................................................................................................................................................................17
Operation................................................................................................................................................................................................18
Handle setting....................................................................................................................................................................................18
Wheel locking ....................................................................................................................................................................................19
Grinder weights.................................................................................................................................................................................20
Tools - access of tools ...................................................................................................................................................................21
Grinding tools - Mounting and changing ...............................................................................................................................22
Transport....................................................................................................................................................................................................23
Prepare to start .................................................................................................................................................................................23
Radio or manual control................................................................................................................................................................24
Standby ................................................................................................................................................................................................24

5
Operating via the control panel - Manual control ...............................................................................................................25
Emergency Stop switch on the grinder ..................................................................................................................................25
Start-up procedure...........................................................................................................................................................................25
Overload...............................................................................................................................................................................................25
Radio control.................................................................................................................................................................................26
Operation via radio control unit – Radio control ................................................................................................................26
Start routine – Radio control .......................................................................................................................................................26
Stop routine – Radio control .......................................................................................................................................................26
Change of radio frequency...........................................................................................................................................................27
Make operation easier...................................................................................................................................................................28
Maintenance.........................................................................................................................................................................................29
Cleaning the machine.....................................................................................................................................................................29
Charging the grinder batteries ...................................................................................................................................................29
Charging the radio control unit batteries...............................................................................................................................29
Spare parts and service...............................................................................................................................................................31
Environment.........................................................................................................................................................................................31
Technical data.....................................................................................................................................................................................32
Frequently asked questions - General:............................................................................................................................34
Fault tracing .........................................................................................................................................................................................35
Electronic error codes..................................................................................................................................................................36
Parts list chassis ..............................................................................................................................................................................40
Parts list Mist Cooler System..................................................................................................................................................42
Parts list handle.................................................................................................................................................................................44
Parts list drive mechanism........................................................................................................................................................46
Parts list grinding head................................................................................................................................................................48
Parts list grinding holder (1x4)...............................................................................................................................................50
Parts list electrical components............................................................................................................................................52

6
Warranty
The warranty only covers manufacturing faults. HTC is not responsible for any damage arising from, or caused by, trans-
port, unpacking or usage. In no case, and under no circumstances will the manufacturer be held responsible for damage or
faults caused by incorrect application, corrosion or due to usage that does not comply with the specications. The manufac-
turer is in no way liable for indirect damages or costs. The manufacturer warranty period is 12 months from commissioning,
although not longer than 18 months from delivery from the factory (General delivery conditions NL92).
Local distributors may have special warranty conditions that are stated in their terms of sale, terms of delivery and warranty
conditions In the event of any uncertainty pertaining to the warranty conditions, please contact your distributor.
The manual
In addition to general functionality, this manual also covers the application and maintenance of the HTC 950 RX™ grinder.
A number of symbols have been used to clearly mark the sections that are of extra importance in the manual, see below. In
order to avoid personal injury and material damage, as far as possible, it is of the utmost importance that you carefully read
and fully understand the texts that accompany these symbols. There are also some practical tips marked with a symbol.
The tips are there to assist you when you use the grinder and help you get the best possible benets from it.
This symbol means Warning! and means risk of personal injury or material damage if the machine and accompanying equipment is
used incorrectly.
If you see this symbol next to a text, read the text extra carefully and do not perform any operation you are unsure of. This is for your
own or for other users’ safety and to avoid damaging the machine or any other equipment.
This symbol means Note! and means risk of possible material damage if the machine and accompanying equipment is used incor-
rectly.
If you see this symbol next to a text, read the text extra carefully and do not perform any operation you are unsure of. This is to avoid
damaging the machine or any other equipment.
This symbol means Tips! and means that you will given tips and advice in the text that follows on facilatory or wear saving measures
for your machine or accompanying equipment.
If you see this symbol next to a text, you should read through the text as it will assist you in your work and extend the service life of the
grinder.

7
Safety
The grinder may only be operated or repaired by personnel who have undergone practical or theoretical training and have read through
this manual.
The instructions in this manual must be observed in order for CE marking to apply.
Only use the machine for grinding or polishing unhewn stone, terrazzo, concrete or any other material specied in this manual.
Do not use the machine in environments where there is a risk of explosion or re.
Wear personal protective equipment at all times - safety boots, ear muffs, protective goggles and protective gloves.
Do not start the machine in folded position. Only start the grinder with the rotating discs facing the oor and with the tools applied.
Be careful when replacing grinding tools as the tools and metal discs can be hot.
Disconnect the power supply from the machine when replacing the grinding tools.
Only lift the machine using the parts specied in this manual.
Do not use the machine on sloping surfaces.
Do not move the machine manually on sloping surfaces as there is a major risk of crushing if the machine starts to roll.
Always tilt the machine after grinding when removing glue or when wet grinding so that the machine does not get stuck to the oor and
destroy machine parts or the oor when restarting.
Always keep the machine in a dry and warm area when it is not being used.
If the machine is kept in a cold area, it must stand in a heated room for two hours prior to use.
Only use the machine with the splash guard tted.
Only use HTC original tools and original spare parts.

8
Vibration and noise
The machine has been tested in accordance with ISO 8662-4 and ISO 11202 with respect to vibration and noise. The mean
value for vibrations is 1.01 m/s² which applies when the grinder accelerates. Sound power level when rough grinding concrete
is 93 dB (mean value). This value varies depending on the choice of tool and type of oor. Always wear ear muffs
Machine plate
Model number and serial number for your machine is shown on the machine plate. This information is required when ordering
spare parts for the grinder. Use the space below to note the model number and serial number of your grinder for future refer-
ence.
MODEL NUMBER _______________________________________________________
SERIAL NUMBER __________________________________________________________
KEY NUMBER _______________________________________________________
Delivery
The following items should be included on delivery. Contact your distributor if anything is missing.
• Grinder
• Radio control
• Splash guard
• Manual
• Key

9
Unpacking the machine
Check carefully if the packaging or the machine has been damaged during delivery. If there are signs of damage,
contact your distributor and report the damage.
Check that the delivery matches your order. Contact your distributor if you have any questions.
Read carefully through the safety instructions and manual before use.
CE marking
CE marking of a product guarantees its free movement within the EU region in line with EU regulations. The CE marking
guarantees that the product meets the various CE directives (EMC directives and other possible requirements in the new
procedures directives). The HTC 950 RX™ grinder has CE marking in accordance with the “Low Voltage Directive” (LVD),
the Machinery Directive and the EMC Directive. The EMC directive stipulates that the electrical equipment must not sub-
ject the surrounding area to electro-magnetic radiation, and that it must also be immune to electromagnetic interference
in the surrounding area.
The following pages include the Manufacturer’s Declaration of Conformity that demonstrates that the HTC 950 RX™
grinder complies with the EMC directives. The HTC 950 RX™ is classied for use in environments such as heavy industry
Class A.

10
Declaration of Conformity
As per the Machinery Directive, 98/37/EG The EMC Directive, 89/336/EEC Low Voltage Directive 73/23/EEC including amend-
ments and as per the CE Marking Directive, 93/68/EEG
Type of equipment Grinder
Make HTC
Trademark HTC 950 RX™
Serial number ___________________
Manufacturer
HTC Sweden AB
Box 69
SE-614 22 Söderköping, Sweden
The product has been CE marked in 2004.
As manufacturer, we declare under our sole responsibility that the product meets the provisions laid down in the Directives
specied above.
Date: 2004-02-12
Sten Jeansson
Managing Director

11
HTC 950 RX™
On the surface it is very similar in appearance to our previ-
ous grinders, but looks deceive. We maintain that the HTC
950 RX™ is “the single most important development for the
oor grinding industry since HTC launched its classic 800
model”.
The HTC 950 RX™ will, due to its unique features, revolu-
tionise our perception of oor grinding.
The HTC 950 RX™ is the result of several years of devel-
opment. This grinder is faster, bigger and more powerful
than its predecessors. Compared to a grinder of the same
size without radio control, it has twice as much capacity
when in operation. Thanks to the radio control, the opera-
tor can move objects that stand in the way of the grinder,
empty the dust extractor and even talk in the telephone
without having to interrupt his work.
The technology and its benets
• What does RX stand for?
R=Radio control – X=Four grinding discs
• Radio control of the grinding unit, i.e. all previous func-
tions and propulsion and steering
• A newly patented drive system with four grinding discs
(previously three) gives the grinder a perfect balance
• Greater motor output of 15 kW
• Integrated system of weights for adjusting grinding
pressure
• Battery operation when moving and loading and un-
loading
• Considerably improved grinding head with increased
service life and reduced maintenance
• The HTC 950 RX™ is included in HTC Superoor
approved equipment which means that it is recom-
mended for production of HTC Superoor™
• Much more efcient and quicker grinding
• The possibility in the future of connecting several
grinding machines that are handled by one operator
as other machines can be run via the HTC 950 RX™
(e.g.
• More even grinding as the drive mechanism ensures
that the machine maintains a constant speed
• The machine is also equipped with EZchange™ which
enables simple tool changing.
• The radio control allows enough time for a single oper-
ator to empty the dust extractor and handle the cables
while the machine is working, which means a longer
effective grinding time/working day.
All in all this means more protable grinding

12
Description of the machine
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1. Drive lock 7. Control panel 13. Weight
2. Motor box drive 8. Handle 14. Grinding cover
3. Electrical cabinet: 9. Handle locking 15. Water connection
4. Weight lock (up position) 10. Lifting eye 16. Weight lock (down position)
5. Connection, extractor 11. Front cover 17. Splash guard
6. 32A Connection, elec 12. Motor
17

13
Function description of machine components
1. Drive lock:
The drive lock locks or releases the machine wheels
from their driving motors in the drive motor box (2).
2. Motor box drive:
The drive motor box holds two driving motors that
drive the wheels of the grinder, providing the driving
lock (1) is not engaged.
3. Electrical cabinet:
The electronics for the grinding head and the battery
for propulsion are located behind the electrical cabinet
cover.
4. Weight lock:
The weight locks are used to lock the balancing
weights (13). The weight lock also doubles as a oor
stop when the machine is tilted backwards when
changing or mounting grinding tools.
5. Connection, extractor:
Connect an external dust extractor to the grinder ex-
tractor here to collect grinding dust when dry grind-
ing.
6. 32A Connection, elec:
Connect 380V mains electricity to this contact
7. Control panel:
The control panel on the machine contains controls
and breakers for operating the oor grinder, along with
control lamps indicating the status of the grinder. See
page 14 for a detailed description.
8. Handle:
The handle can be locked in various positions de-
pending on the operation to be carried out by the oor
grinder.
9. Handle locking:
Spring loaded locks are located on both sides of the
handle cover’s upper and lower side for locking the
handle.
10. Lifting eye:
Attach appropriate lifting tackle to the lifting eye when
lifting the machine.
11. Front cover:
The front cover conceals the pipes between the ex-
tractor (5) and grinding cover (14), and the electrical
connection to the motor (12).
12. Motor:
The motor runs the grinding head that holds the grind-
ing tools.
13. Weight:
The weights can be set in three different positions
(See page 20) depending on the required weight dis-
tribution and grinding pressure.
14. Grinding cover:
The grinding cover conceals the grinding head with
the grinding tools.
15. Water connection:
Connection of water for wet grinding.
16. Weight lock (see item 4)
17. Splash guard:
The splash guard prevents grinding dust from spread-
ing across the oor.

14
Control panel on the machine 123
4
5
6
78
9
1. Standby indicator 4. Radio control indicator 7. Start/Stop of grinding head rotation
2. Overload indicator 5. Radio control On/Off 8. Emergency stop
3. Communication error indicator 6. Adjustment of rotation speed of the grinding head 9. Ignition switch

15
Control description - Control panel
1. Standby indicator - Power:
This lamp indicates the machine is in standby mode
with its systems activated. The position of the key in
the ignition switch (9) determines whether the grinder
is shut off or in standby mode and ready for use.
2. Overload indicator:
This lamp lights when the grinder is using too much
power when processing. Ignoring this warning lamp
will result in the power supply to the grinder being cut
via an overload protection device.
3. Communication error indicator - Com Error:
This lamp is lit when a communications error occurs
between the oor grinder and the radio control unit.
4. Radio control indicator - Radio Enabled:
When the “Radio On/Off” (5) knob is turned to the right
the indicator lamp lights. When the lamp is lit the ma-
chine is ready to be controlled via the radio control
unit. See description page 16.
5. Radio control On/Off:
When the switch for radio control “Radio On/Off” on
the grinder’s control panel is turned to the right, the
“Radio Enabled” lamp lights and the machine is now
ready to be controlled via the radio control unit.
Activating the radio control on the operator panel over-
rides the “Start/Stop” (7) and “Speed” (6) controls on this
panel. Only “On/Off” (5) and the emergency stop “EM-
stop” (8) are now active.
6. Adjustment of rotational speed of the grinding
head - Speed (Grinding Head Speed):
Use this knob to set an appropriate rotation speed
for the grinding head. This is only possible when the
grinding head is started via the “Start/Stop” knob (7).
7. Start/Stop of the rotation of the grinding head -
Start/Stop (Grinding Head):
Use this switch to start or stop the grinding head rota-
tion. Use the “Speed” knob (6) to adjust the rotational
speed.
8. Emergency Stop - EM-Stop:
Only use the Emergency Stop switch, “EM-Stop” in
emergencies when immediate shutdown of the grind-
er is necessary.
As long as the emergency stop switch “EM-Stop” is
pressed in, the machine cannot be started. Reset by
turning the emergency stop 45° so that the switch pops
out again. The machine is now ready to be restarted.
9. Ignition switch (Standby):
Turn the key in the ignition switch to the right to acti-
vate the electrical system of the grinder. The machine
assumes standby mode and is ready for use.

16
Radio control unit
1
2
3
4
5
6
7
8
9
10
11
12
1. OFF/ON, Emergency stop
2. Steering control
3. Frequency button
4. Grinding head rpm
5. Grinding head OFF/ON
6. Battery LED
7. Radio LED
8. Battery
9. Speed, motion
10. Motion, fwd/rev
11. Adjustment, control
12. Start Radio

17
Description of controls – Radio control unit
1. OFF/ON, Emergency stop
OFF/ON and emergency stop; used to switch the hand
controller off and on. Can be used as an emergency
stop. Cuts off radio communication between hand con-
troller and the radio receiver of the machine, causing the
machine to stop immediately. If this button is not pressed,
the hand controller draws current and discharges the bat-
tery. The cap on the emergency stop is a key which can
be removed so that no unauthorised person can use the
machine.
2. Steering control
With this control the operator can make the machine turn
to the right or the left.
3. Frequency button
This button changes the radio control frequency.
4. Grinding head rpm
This potentiometer is used to adjust the rotation speed of
the grinding head of the machine, with the grinding tools.
5. Grinding head OFF/ON
This switch starts or stops the rotation of the grinding
head.
6. Battery LED
This LED lights up red to indicate that the battery needs
charging.
7. Radio LED
This LED ashes green to indicate that the hand controller
is transmitting.
8. Battery
Supplies power to the hand controller.
9. Speed, motion
This potentiometer is used to adjust the speed of the
machine in the current direction of motion.
10. Motion, fwd/rev
This switch is used to set the direction of travel of the
machine.
11. Adjustment, control
This potentiometer is used to adjust any tendency of the
oor grinding machine to turn when operated with the
radio control unit.
12. Start Radio
This button starts radio communication between the hand
controller and the radio receiver of the machine.

18
Operation
The HTC 950 RX™ contains a number of functions that are
important to know prior to operation. Read carefully through
the functions of the various systems to ensure that you fully
understand their purpose, this will ensure your optimal use
of the grinder.
Forwards position: Used when transporting etc.,
when the grinder takes up substantially less space.
Up position: Is ideal when operating via the radio
control unit. Run the mains cable and if necessary
the extractor hose through the handle in this case.
This position also applies when the machine is tilted
backwards when changing grinding tools.
Back position: Always use when operating the grind-
er manually but can also be used when operating via
radio control.
Picture 2. Depending on the type of work task a suitable position
can be set using the HTC 950 RX™ adjustable handle.
Handle setting
Set a suitable working height using the adjustable handle
on the HTC 950 RX™. A handle locking
mechanism is located on both the upper (see picture 1)
and lower side of the handle cover. The handle can be
folded in several different positions (see picture 2.)
Picture 1. Release the handle by moving the two round safety
grips against each other. The handle now drops to the required
xed position. Release the safety grips again to lock.
Back position
Up position
Forwards position